Toyota Avalon (XX50): Lighting System(for Hv Model With Cornering Light)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Vehicle Exterior / Lighting (ext) / Lighting System(for Hv Model With Cornering Light)

Automatic High Beam Switch Indicator does not Come ON

DESCRIPTION

When the automatic high beam system is on, the main body ECU (multiplex network body ECU) illuminates the auto high beam switch indicator.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.
Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
Click here

PROCEDURE

1.	PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / Main Body / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > Main Body > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Automatic High Beam Switch Light	Auto high beam switch indicator light	OFF or ON	-

Body Electrical > Main Body > Active Test

Tester Display
Automatic High Beam Switch Light

OK:

Auto high beam switch indicator light illuminates.

USE SIMULATION METHOD TO CHECK

2.	INSPECT AUTO HIGH BEAM SWITCH

(a) Remove the auto high beam switch.

Click here

(b) Inspect the auto high beam switch.

Click here

REPLACE AUTO HIGH BEAM SWITCH

3.	CHECK HARNESS AND CONNECTOR (POWER SOURCE - AUTO HIGH BEAM SWITCH)

(a) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
G31-3 (IND+) - Body ground	Power switch off	11 to 14 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	CHECK HARNESS AND CONNECTOR (AUTO HIGH BEAM SWITCH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Disconnect the G32 main body ECU (multiplex network body ECU) connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
G31-4 (AZBI) - G32-23 (AHID)	Always	Below 1 Ω
G31-4 (AZBI) or G32-23 (AHID) - Body ground	Always	10 kΩ or higher

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

REPAIR OR REPLACE HARNESS OR CONNECTOR

Automatic High Beam System does not Operate or Operation Indicator does not Illuminate

DESCRIPTION

The main body ECU (multiplex network body ECU) controls the automatic high beam system based on signals received from the forward recognition camera.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
Click here
When replacing the forward recognition camera, always replace it with a new one. If a forward recognition camera which was installed to another vehicle is used, the information stored in the forward recognition camera will not match the information from the vehicle. As a result, a DTC may be stored.
If the forward recognition camera has been replaced with a new one, be sure to perform Forward Recognition Camera Learning.
Click here
Before performing troubleshooting, check that the low beam headlights and high beam headlights illuminate correctly.
When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.
When the forward recognition camera cannot correctly detect objects due to inclement weather such as thick fog or other visual obstructions, the automatic high beam indicator may not turn on and consequently the automatic high beam system may not operate.
Before performing troubleshooting, check that the pre-collision system DTCs are not output.
Click here

PROCEDURE

1.	READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Chassis / Front Recognition Camera / Data List.

(e) Read the Data List according to the display on the Techstream.

Chassis > Front Recognition Camera > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
High Temperature Status1	High temperature malfunction status	OFF or ON	OFF: Forward recognition camera high temperature malfunction does not exist ON: Forward recognition camera high temperature malfunction exists	-

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

High Temperature Status1

High temperature malfunction status

OFF or ON

OFF: Forward recognition camera high temperature malfunction does not exist

ON: Forward recognition camera high temperature malfunction exists

Chassis > Front Recognition Camera > Data List

Tester Display
High Temperature Status1

OK:

"OFF" is displayed on the Techstream.

HINT:

If "ON" is displayed, move the vehicle to a cool place and allow the temperature of the forward recognition camera to decrease before continuing with troubleshooting.

END (TEMPORARY SUSPENSION OF AUTOMATIC HIGH BEAM SYSTEM DUE TO HIGH FORWARD RECOGNITION CAMERA TEMPERATURE)

2.	CHECK AUTOMATIC HIGH BEAM INDICATOR LIGHT

(a) Check the operation of the automatic high beam indicator light.

(1) Turn the power switch on (IG).

(2) Turn the light control switch to the AUTO or head position.

(3) Cover the automatic light control sensor to turn the low beam headlights on.

(4) Move the dimmer switch to the high position.

(5) Press the auto high beam switch.

Result	Proceed to
OK (The automatic high beam indicator light and the auto high beam switch indicator illuminate)	A
NG (Automatic high beam indicator light does not illuminate)	B
NG (Auto high beam switch indicator does not illuminate)	C
NG (Automatic high beam indicator light and auto high beam switch indicator do not operate)	D

GO TO STEP 5

GO TO OTHER PROBLEM (Proceed to Automatic High Beam Switch Indicator does not Come ON)

GO TO STEP 6

3.	READ VALUE USING TECHSTREAM

Forward Recognition Camera

(Automatic High Beam Sensor)

Work Light or Equivalent

100 mm or less

(a) Shine a light on the automatic high beam sensor.

HINT:

If troubleshooting is being performed in a bright area, such as outside on a sunny day, it will not be necessary to perform this step.

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / Main Body / Data List.

(f) Read the Data List according to the display on the Techstream.

HINT:

As it may take time for the values in the Data List to change, wait at least 10 seconds before reading the Data List.

Body Electrical > Main Body > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Auto H Beam STS0	Automatic high beam sensor current state	Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin or LIN Err	Condition can be displayed	-

Body Electrical > Main Body > Data List

Tester Display
Auto H Beam STS0

OK:

"Daytime" is displayed on the Techstream.

REPLACE FORWARD RECOGNITION CAMERA

4.	READ VALUE USING TECHSTREAM

*1	Cardboard or Equivalent Object
*a	150 mm or more
*b	3 mm or more

(a) Cover the automatic high beam sensor with an opaque object, such as cardboard.

NOTICE:

Make sure that there is no clearance between the cardboard or equivalent object and the area of the windshield glass in front of the automatic high beam sensor.
If there is any clearance, light may shine on the automatic high beam sensor and the value of the Data List will not change.

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / Main Body / Data List.

(f) Read the Data List according to the display on the Techstream.

HINT:

As it may take time for the values in the Data List to change, wait at least 10 seconds before reading the Data List.

Body Electrical > Main Body > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Auto H Beam STS0	Automatic high beam sensor current state	Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin or LIN Err	Condition can be displayed	-

Body Electrical > Main Body > Data List

Tester Display
Auto H Beam STS0

OK:

"Speed" is displayed on the Techstream.

USE SIMULATION METHOD TO CHECK

REPLACE FORWARD RECOGNITION CAMERA

5.	PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / Combination Meter / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > Combination Meter > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Multi Display All (White)	Multi-information display (White display)	OFF or ON	-

Body Electrical > Combination Meter > Active Test

Tester Display
Multi Display All (White)

OK:

The multi-information display in the combination meter assembly turns on according to the operation of the Active Test.

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

REPLACE COMBINATION METER ASSEMBLY

6.	READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / Main Body / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Main Body > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Auto High Beam Main Switch

Auto high beam switch signal

OFF or ON

OFF: Auto high beam switch not pressed

ON: Auto high beam switch pressed

Body Electrical > Main Body > Data List

Tester Display
Auto High Beam Main Switch

OK:

Normal conditions listed above are displayed.

GO TO STEP 8

7.	READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / Main Body / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Main Body > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Auto H Beam STS0	Automatic high beam sensor current state	Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin or LIN Err	Condition can be displayed	-

Body Electrical > Main Body > Data List

Tester Display
Auto H Beam STS0

OK:

"Daytime" or "Speed" is displayed on the Techstream.

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

REPLACE FORWARD RECOGNITION CAMERA

8.	INSPECT AUTO HIGH BEAM SWITCH

(a) Remove the auto high beam switch.

Click here

(b) Inspect the auto high beam switch.

Click here

REPLACE AUTO HIGH BEAM SWITCH

9.	CHECK HARNESS AND CONNECTOR (AUTO HIGH BEAM SWITCH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND BODY GROUND)

(a) Disconnect the G33 main body ECU (multiplex network body ECU) connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
G31-5 (+B) - G33-26 (AHBI)	Always	Below 1 Ω
G31-5 (+B) or G33-26 (AHBI) - Body ground	Always	10 kΩ or higher
G31-2 (E) - Body ground	Always	Below 1 Ω

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

REPAIR OR REPLACE HARNESS OR CONNECTOR

Automatic High Beam System (B124B)

DESCRIPTION

The main body ECU (multiplex network body ECU) determines the status of the automatic high beam system based on the automatic high beam system signal from the forward recognition camera.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	DTC Output from
B124B	Automatic High Beam System	Malfunction in automatic high beam system	Front camera system Dynamic radar cruise control system Lane departure alert system Pre-collision system Hybrid control system Electronically controlled brake system CAN communication system Forward recognition camera Main body ECU (multiplex network body ECU)	Main body ECU (multiplex network body ECU)

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

The lighting system (for HV Model with Cornering Light) uses the CAN communication system. Inspect the communication functions by following How to Proceed with Troubleshooting. Troubleshoot the automatic high beam system after confirming that the communication systems are functioning properly.
Click here
Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
Click here

HINT:

If the forward recognition camera stores a DTC for a malfunction of any of the following, this DTC will be stored simultaneously.

Speed sensor
Yaw rate sensor
CAN communication system

PROCEDURE

1.	CHECK FOR DTC (HEALTH CHECK)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: System Select / Health Check.

(e) Check for DTCs.

Result	Proceed to
Only DTC B124B is output	A
DTC B124B and other DTCs are output	B

GO TO OTHER DTC CHART

2.	CHECK FRONT CAMERA SYSTEM

(a) Check if a dynamic radar cruise control system, lane departure alert system or pre-collision system warning message is displayed on the multi-information display.

Click here

OK:

No dynamic radar cruise control system, lane departure alert system and pre-collision system warning messages are displayed.

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

GO TO FRONT CAMERA SYSTEM

Automatic High Beam Camera (B124C)

DESCRIPTION

The main body ECU (multiplex network body ECU) detects a high beam headlight illumination request signal of the automatic high beam system from the forward recognition camera.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	DTC Output from
B124C	Automatic High Beam Camera	Malfunction in forward recognition camera	Front camera system	Main body ECU (multiplex network body ECU)

WIRING DIAGRAM

PROCEDURE

1.	CHECK FRONT CAMERA SYSTEM

(a) Check front camera system.

Click here

END

Right Headlight ECU Malfunction (B242C,B242D)

DESCRIPTION

The headlight ECU sub-assembly LH or headlight ECU sub-assembly RH stores a DTC if it detects an internal malfunction.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

B242C

Right Headlight ECU Malfunction

The power switch is on (IG).

Headlight ECU sub-assembly RH internal malfunction

Maximum 15 minutes

Headlight ECU sub-assembly RH

B242D

Left Headlight ECU Malfunction

The power switch is on (IG).

Headlight ECU sub-assembly LH internal malfunction

Maximum 15 minutes

Headlight ECU sub-assembly LH

CAUTION / NOTICE / HINT

NOTICE:

If the headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information the headlight ECU sub-assembly LH.

Click here

PROCEDURE

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.

(e) Clear the DTCs.

Body Electrical > HL AutoLeveling > Clear DTCs Body Electrical > HL AutoLeveling (Sub) > Clear DTCs

2.	CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.

(f) Check for DTCs.

Body Electrical > HL AutoLeveling > Trouble Codes Body Electrical > HL AutoLeveling (Sub) > Trouble Codes

OK:

DTC B242C and B242D are not output.

Result	Proceed to
OK	A
NG (DTC B242C is output)	B
NG (DTC B242D is output)	C

USE SIMULATION METHOD TO CHECK

REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH

Open in IG Circuit (B242E)

DESCRIPTION

The headlight ECU sub-assembly operates using the power source voltage input from the IG terminal and ECUB terminal.

The IG terminal power source voltage is supplied by turning the IG1-NO. 1 relay to ON.

The headlight ECU sub-assembly receives power switch on (IG) signals from the main body ECU (multiplex network body ECU) via CAN communication, compares the power switch on (IG) signal and the power source voltage supply condition of the IG terminal and monitors the result.

HL AutoLeveling

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

B242E

Open in IG Circuit

The power switch is on (IG).

When the IG terminal power source voltage is 0 V (power switch off), IG ON signals from the main body ECU (multiplex network body ECU) via CAN communication are continuously received

10 seconds or more

Headlight ECU sub-assembly LH
Harness or connector

Headlight ECU sub-assembly LH

HL AutoLeveling (Sub)

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

B242E

Open in IG Circuit

The power switch is on (IG).

When the IG terminal power source voltage is 0 V (power switch off), IG ON signals from the main body ECU (multiplex network body ECU) via CAN communication are continuously received

10 seconds or more

Headlight ECU sub-assembly RH
Harness or connector

Headlight ECU sub-assembly RH

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.
If the headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information the headlight ECU sub-assembly LH.
Click here

PROCEDURE

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.

(e) Clear the DTCs.

Body Electrical > HL AutoLeveling > Clear DTCs Body Electrical > HL AutoLeveling (Sub) > Clear DTCs

2.	CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.

(f) Check for DTCs.

Body Electrical > HL AutoLeveling > Trouble Codes Body Electrical > HL AutoLeveling (Sub) > Trouble Codes

OK:

DTC B242E is not output.

Result	Proceed to
OK	A
NG (DTC output from headlight ECU sub-assembly LH)	B
NG (DTC output from headlight ECU sub-assembly RH)	C

USE SIMULATION METHOD TO CHECK

GO TO STEP 5

3.	INSPECT HEADLIGHT ECU SUB-ASSEMBLY LH (IG TERMINAL VOLTAGE)

*a	Front view of wire harness connector (to Headlight ECU Sub-assembly LH)

(a) Disconnect the A8 headlight ECU sub-assembly LH connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
A8-4 (IG) - Body ground	Power switch on (IG)	11 to 14 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	CHECK HARNESS AND CONNECTOR (HEADLIGHT ECU SUB-ASSEMBLY LH - BODY GROUND)

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
A8-12 (GND) - Body ground	Always	Below 1 Ω

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.	INSPECT HEADLIGHT ECU SUB-ASSEMBLY RH (IG TERMINAL VOLTAGE)

*a	Front view of wire harness connector (to Headlight ECU Sub-assembly RH)

(a) Disconnect the A9 headlight ECU sub-assembly RH connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
A9-4 (IG) - Body ground	Power switch on (IG)	11 to 14 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.	CHECK HARNESS AND CONNECTOR (HEADLIGHT ECU SUB-ASSEMBLY RH - BODY GROUND)

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
A9-12 (GND) - Body ground	Always	Below 1 Ω

REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH

REPAIR OR REPLACE HARNESS OR CONNECTOR

Open in B Power Line (B242F)

DESCRIPTION

The headlight ECU sub-assembly operates using the power source voltage input from the IG terminal and ECUB terminal.

The power source voltage of the ECUB terminal is supplied when the main body ECU (multiplex network body ECU) turns the ECUB power supply relay (H-LP LH relay and H-LP RH relay) to ON.

The headlight ECU sub-assembly compares the power source voltage supply condition of the IG terminal and ECUB terminal and monitors the result.

HL AutoLeveling

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

B242F

Open in B Power Line

The power switch is on (IG).

No power source voltage supplied to ECUB terminal while power source voltage being supplied to IG terminal

10 seconds or more

Headlight ECU sub-assembly LH
Harness or connector
H-LP LH relay
Instrument panel junction block assembly
Main body ECU (multiplex network body ECU)

Headlight ECU sub-assembly LH

HL AutoLeveling (Sub)

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

B242F

Open in B Power Line

The power switch is on (IG).

No power source voltage supplied to ECUB terminal while power source voltage being supplied to IG terminal

10 seconds or more

Headlight ECU sub-assembly RH
Harness or connector
H-LP RH relay
Main body ECU (multiplex network body ECU)

Headlight ECU sub-assembly RH

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.
Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
Click here
If the headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information the headlight ECU sub-assembly LH.
Click here

PROCEDURE

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.

(e) Clear the DTCs.

Body Electrical > HL AutoLeveling > Clear DTCs Body Electrical > HL AutoLeveling (Sub) > Clear DTCs

2.	CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.

(f) Check for DTCs.

Body Electrical > HL AutoLeveling > Trouble Codes Body Electrical > HL AutoLeveling (Sub) > Trouble Codes

OK:

DTC B242F is not output.

Result	Proceed to
OK	A
NG (DTC output from headlight ECU sub-assembly LH)	B
NG (DTC output from headlight ECU sub-assembly RH)	C

USE SIMULATION METHOD TO CHECK

GO TO STEP 10

3.	INSPECT HEADLIGHT ECU SUB-ASSEMBLY LH (ECUB TERMINAL VOLTAGE)

*a	Front view of wire harness connector (to Headlight ECU Sub-assembly LH)

(a) Disconnect the A8 headlight ECU sub-assembly LH connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
A8-13 (ECUB) - Body ground	Power switch on (IG)	9.5 to 14 V

GO TO STEP 5

4.	CHECK HARNESS AND CONNECTOR (HEADLIGHT ECU SUB-ASSEMBLY LH - BODY GROUND)

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
A8-12 (GND) - Body ground	Always	Below 1 Ω

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.	INSPECT H-LP LH RELAY

(a) Inspect the H-LP LH relay.

Click here

REPLACE H-LP LH RELAY

6.	CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - HEADLIGHT ECU SUB-ASSEMBLY LH)

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
5 (H-LP LH relay) - A8-13 (ECUB)	Always	Below 1 Ω
5 (H-LP LH relay) or A8-13 (ECUB) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.	CHECK HARNESS AND CONNECTOR (POWER SOURCE - H-LP LH RELAY)

(a) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
1 (H-LP LH relay) - Body ground	Power switch off	11 to 14 V
3 (H-LP LH relay) - Body ground	Power switch off	11 to 14 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.	CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

(a) Disconnect the 4F instrument panel junction block assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
2 (H-LP LH relay) - 4F-31	Always	Below 1 Ω
2 (H-LP LH relay) or 4F-31 - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

9.	INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

Component without harness connected

(Instrument Panel Junction Block Assembly)

(a) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

Click here

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
4F-31 - MB-15 (HRLY)	Always	Below 1 Ω

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

10.	INSPECT HEADLIGHT ECU SUB-ASSEMBLY RH (ECUB TERMINAL VOLTAGE)

*a	Front view of wire harness connector (to Headlight ECU Sub-assembly RH)

(a) Disconnect the A9 headlight ECU sub-assembly RH connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
A9-13 (ECUB) - Body ground	Power switch on (IG)	9.5 to 14 V

GO TO STEP 12

11.	CHECK HARNESS AND CONNECTOR (HEADLIGHT ECU SUB-ASSEMBLY RH - BODY GROUND)

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
A9-12 (GND) - Body ground	Always	Below 1 Ω

REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH

REPAIR OR REPLACE HARNESS OR CONNECTOR

12.	INSPECT H-LP RH RELAY

(a) Inspect the H-LP RH relay.

Click here

REPLACE H-LP RH RELAY

13.	CHECK HARNESS AND CONNECTOR (H-LP RH RELAY - HEADLIGHT ECU SUB-ASSEMBLY RH)

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
5 (H-LP RH relay) - A9-13 (ECUB)	Always	Below 1 Ω
5 (H-LP RH relay) or A9-13 (ECUB) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

14.	CHECK HARNESS AND CONNECTOR (POWER SOURCE - H-LP RH RELAY)

(a) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
1 (H-LP RH relay) - Body ground	Power switch off	11 to 14 V
3 (H-LP RH relay) - Body ground	Power switch off	11 to 14 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

15.	CHECK HARNESS AND CONNECTOR (H-LP RH RELAY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Disconnect the G33 main body ECU (multiplex network body ECU) connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
2 (H-LP RH relay) - G33-12 (HRY2)	Always	Below 1 Ω
2 (H-LP RH relay) or G33-12 (HRY2) - Body ground	Always	10 kΩ or higher

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

REPAIR OR REPLACE HARNESS OR CONNECTOR

Left Low Beam Fan Malfunction (B243D,B243E)

DESCRIPTION

The headlight ECU sub-assembly operates the low beam fan to cool the headlight LED unit in order to prevent the headlight LED unit from overheating.

Illuminates the low beam headlights and continuously operates the low beam fan.

The headlight ECU sub-assembly monitors the pulse signals from the FANP terminal when the low beam fans are operating.

HINT:

If B243D or B243E is output, the headlight ECU sub-assembly performs low beam headlight dimming control.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

B243D

Left Low Beam Fan Malfunction

All of the following conditions are met:
- Power switch on (IG)
- Low beam headlights on

Fan speed signals from the low beam fan of less than 2550 rpm are continuously detected

4 seconds or more

Headlight ECU sub-assembly LH
Headlight assembly LH

Headlight ECU sub-assembly LH

B243E

Right Low Beam Fan Malfunction

All of the following conditions are met:
- Power switch on (IG)
- Low beam headlights on

Fan speed signals from the low beam fan of less than 2550 rpm are continuously detected

4 seconds or more

Headlight ECU sub-assembly RH
Headlight assembly RH

Headlight ECU sub-assembly RH

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

If the headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information the headlight ECU sub-assembly LH.
Click here
If the headlight assembly LH has been replaced, it is necessary to synchronize the vehicle information the headlight ECU sub-assembly LH.
Click here

PROCEDURE

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.

(e) Clear the DTCs.

Body Electrical > HL AutoLeveling > Clear DTCs Body Electrical > HL AutoLeveling (Sub) > Clear DTCs

2.	CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.

(f) Check for DTCs.

Body Electrical > HL AutoLeveling > Trouble Codes Body Electrical > HL AutoLeveling (Sub) > Trouble Codes

OK:

DTC B243D and B243E are not output.

Result	Proceed to
OK	A
NG (DTC B243D is output)	B
NG (DTC B243E is output)	C

USE SIMULATION METHOD TO CHECK

GO TO STEP 6

3.	CHECK HEADLIGHT ASSEMBLY LH

(a) Remove each headlight ECU sub-assembly, interchange the headlight assembly LH with RH and connect the connectors.

Click here

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.

(e) Clear the DTCs.

Body Electrical > HL AutoLeveling > Clear DTCs Body Electrical > HL AutoLeveling (Sub) > Clear DTCs

5.	CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.

(f) Check for DTCs.

Body Electrical > HL AutoLeveling > Trouble Codes Body Electrical > HL AutoLeveling (Sub) > Trouble Codes

Result	Proceed to
DTC B243D is output	A
DTC B243E is output	B

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH

REPLACE HEADLIGHT ASSEMBLY LH

6.	CHECK HEADLIGHT ASSEMBLY RH

(a) Remove each headlight ECU sub-assembly, interchange the headlight assembly RH with LH and connect the connectors.

Click here

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.

(e) Clear the DTCs.

Body Electrical > HL AutoLeveling > Clear DTCs Body Electrical > HL AutoLeveling (Sub) > Clear DTCs

8.	CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.

(f) Check for DTCs.

Body Electrical > HL AutoLeveling > Trouble Codes Body Electrical > HL AutoLeveling (Sub) > Trouble Codes

Result	Proceed to
DTC B243E is output	A
DTC B243D is output	B

REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH

REPLACE HEADLIGHT ASSEMBLY RH

Light Sensor Circuit (B1244)

DESCRIPTION

The automatic light control sensor detects ambient light. The sensor creates an electrical signal based on the amount of light detected, and sends the signal to the main body ECU (multiplex network body ECU). The main body ECU (multiplex network body ECU) turns on or off the headlights and taillights according to the signal.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

B1244

Light Sensor Circuit

The power switch is on (IG).

Either of the following conditions is met:
- Malfunction in automatic light control sensor
- Open or short in automatic light control sensor circuit

5 seconds or more

Automatic light control sensor
Harness or connector
Main body ECU (multiplex network body ECU)

Main body ECU (multiplex network body ECU)

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Before replacing the main body ECU (multiplex network body ECU), refer to Registration.

Click here

PROCEDURE

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / Main Body / Trouble Codes.

(e) Clear the DTCs.

Body Electrical > Main Body > Clear DTCs

2.	CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / Main Body / Trouble Codes.

(f) Check for DTCs.

Body Electrical > Main Body > Trouble Codes

OK:

DTC B1244 is not output.

USE SIMULATION METHOD TO CHECK

3.	READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / Main Body / Data List.

(e) According to the display on the Techstream, read the Data List and check that the value of Light Sensor Illuminance changes while performing the following:

(1) Cover the automatic light control sensor with an opaque object.

(2) Slowly move the opaque object to uncover and then cover the automatic light control sensor.

Body Electrical > Main Body > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Light Sensor Illuminance	Light control sensor illuminance	0 to 8191 lx or SensorFail	Value is output according to ambient light level	-

Body Electrical > Main Body > Data List

Tester Display
Light Sensor Illuminance

OK:

The value changes according to the amount the automatic light control sensor is covered.

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

4.	CHECK HARNESS AND CONNECTOR (AUTOMATIC LIGHT CONTROL SENSOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Disconnect the G23 automatic light control sensor connector.

(b) Disconnect the G33 main body ECU (multiplex network body ECU) connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
G23-1 (CLTB) - G33-23 (CLTB)	Always	Below 1 Ω
G23-4 (CLTS) - G33-24 (CLTS)	Always	Below 1 Ω
G23-2 (CLTE) - G33-25 (CLTE)	Always	Below 1 Ω
G23-1 (CLTB) or G33-23 (CLTB) - Body ground	Always	10 kΩ or higher
G23-4 (CLTS) or G33-24 (CLTS) - Body ground	Always	10 kΩ or higher
G23-2 (CLTE) or G33-25 (CLTE) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.	INSPECT MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

*a	Component with harness connected (Main Body ECU (Multiplex Network Body ECU))

(a) Connect the G33 main body ECU (multiplex network body ECU) connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
G33-23 (CLTB) - G33-25 (CLTE)	Power switch off	Below 1 V
G33-23 (CLTB) - G33-25 (CLTE)	Power switch on (IG)	11 to 14 V

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

6.	INSPECT AUTOMATIC LIGHT CONTROL SENSOR

(a) Inspect the automatic light control sensor.

Click here

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

REPLACE AUTOMATIC LIGHT CONTROL SENSOR

Steering Position Sensor (B2414)

DESCRIPTION

The headlight ECU sub-assembly LH receives steering angle signals from the steering sensor via CAN communication and performs light control.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

B2414

Steering Position Sensor

The power switch is on (IG).

Sensor malfunction signals are continuously received from the steering sensor

10 seconds or more

Electronically controlled brake system

Headlight ECU sub-assembly LH

WIRING DIAGRAM

PROCEDURE

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / HL AutoLeveling / Trouble Codes.

(e) Clear the DTCs.

Body Electrical > HL AutoLeveling > Clear DTCs

2.	CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / HL AutoLeveling / Trouble Codes.

(f) Check for DTCs.

Body Electrical > HL AutoLeveling > Trouble Codes

OK:

DTC B2414 is not output.

USE SIMULATION METHOD TO CHECK

GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM

Vehicle Speed Sensor (B2415)

DESCRIPTION

The headlight ECU sub-assembly LH receives speed signals from the skid control ECU (brake booster with master cylinder assembly) via CAN communication and performs light control.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

B2415

Vehicle Speed Sensor

The power switch is on (IG).

Wheel speed sensor invalid signals are continuously received from the skid control ECU (brake booster with master cylinder assembly)

10 seconds or more

Electronically controlled brake system

Headlight ECU sub-assembly LH

WIRING DIAGRAM

PROCEDURE

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / HL AutoLeveling / Trouble Codes.

(e) Clear the DTCs.

Body Electrical > HL AutoLeveling > Clear DTCs

2.	CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / HL AutoLeveling / Trouble Codes.

(f) Check for DTCs.

Body Electrical > HL AutoLeveling > Trouble Codes

OK:

DTC B2415 is not output.

USE SIMULATION METHOD TO CHECK

GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM

Headlight LH Circuit (B2439,B243A)

DESCRIPTION

The headlight ECU sub-assembly LH and headlight ECU sub-assembly RH internally boost the power supply voltage to ensure a constant supplied current for the low beam LED of their respective headlight.

By monitoring the LED power supply voltage, abnormal current and malfunctions can be detected.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

B2439

Headlight LH Circuit

All of the following conditions are met:
- Power switch on (IG)
- Low beam headlights on

Malfunction status:

Headlight assembly malfunction
Open/short in low beam circuit

10 seconds or more

Headlight ECU sub-assembly LH
Headlight assembly LH

Headlight ECU sub-assembly LH

B243A

Headlight RH Circuit

All of the following conditions are met:
- Power switch on (IG)
- Low beam headlights on

Malfunction status:

Headlight assembly malfunction
Open/short in low beam circuit

10 seconds or more

Headlight ECU sub-assembly RH
Headlight assembly RH

Headlight ECU sub-assembly RH

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

If the headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information the headlight ECU sub-assembly LH.
Click here
If the headlight assembly LH has been replaced, it is necessary to synchronize the vehicle information the headlight ECU sub-assembly LH.
Click here

PROCEDURE

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.

(e) Clear the DTCs.

Body Electrical > HL AutoLeveling > Clear DTCs Body Electrical > HL AutoLeveling (Sub) > Clear DTCs

2.	CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.

(f) Check for DTCs.

Body Electrical > HL AutoLeveling > Trouble Codes Body Electrical > HL AutoLeveling (Sub) > Trouble Codes

OK:

DTC B2439 and B243A are not output.

Result	Proceed to
OK	A
NG (DTC B2439 is output)	B
NG (DTC B243A is output)	C

USE SIMULATION METHOD TO CHECK

GO TO STEP 6

3.	CHECK HEADLIGHT ASSEMBLY LH

(a) Remove each headlight ECU sub-assembly, interchange the headlight assembly LH with RH and connect the connectors.

Click here

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.

(e) Clear the DTCs.

Body Electrical > HL AutoLeveling > Clear DTCs Body Electrical > HL AutoLeveling (Sub) > Clear DTCs

5.	CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.

(f) Check for DTCs.

Body Electrical > HL AutoLeveling > Trouble Codes Body Electrical > HL AutoLeveling (Sub) > Trouble Codes

Result	Proceed to
DTC B2439 is output	A
DTC B243A is output	B

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH

REPLACE HEADLIGHT ASSEMBLY LH

6.	CHECK HEADLIGHT ASSEMBLY RH

(a) Remove each headlight ECU sub-assembly, interchange the headlight assembly RH with LH and connect the connectors.

Click here

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.

(e) Clear the DTCs.

Body Electrical > HL AutoLeveling > Clear DTCs Body Electrical > HL AutoLeveling (Sub) > Clear DTCs

8.	CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.

(f) Check for DTCs.

Body Electrical > HL AutoLeveling > Trouble Codes Body Electrical > HL AutoLeveling (Sub) > Trouble Codes

Result	Proceed to
DTC B243A is output	A
DTC B2439 is output	B

REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH

REPLACE HEADLIGHT ASSEMBLY RH

Variation Code not Written (B2451)

DESCRIPTION

The headlight ECU sub-assembly LH stores this DTC if the vehicle specifications have not been stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

B2451

Variation Code not Written

The power switch is on (IG).

Vehicle specifications have not been stored

Headlight ECU sub-assembly LH

CAUTION / NOTICE / HINT

NOTICE:

If the headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information the headlight ECU sub-assembly LH.

Click here

PROCEDURE

1.	SYNCHRONIZE VEHICLE INFORMATION

(a) Synchronize the vehicle information.

Click here

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / HL AutoLeveling / Trouble Codes.

(e) Clear the DTCs.

Body Electrical > HL AutoLeveling > Clear DTCs

3.	CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / HL AutoLeveling / Trouble Codes.

(e) Check for DTCs.

Body Electrical > HL AutoLeveling > Trouble Codes

OK:

DTC B2451 is not output.

HINT:

If the headlight ECU sub-assembly LH stores DTC B2451 even though the vehicle information has been synchronized, the headlight ECU sub-assembly LH may be malfunctioning.

END (VEHICLE SPECIFICATIONS WERE NOT STORED)

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH

Left Headlight ECU Variation Error (B2456)

DESCRIPTION

This DTC is stored if the headlight ECU sub-assembly LH for another destination is installed.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

B2456

Left Headlight ECU Variation Error

The power switch is on (IG).

Vehicle specification information received via CAN communication is continuously mismatched

Hybrid vehicle control ECU
Main body ECU (multiplex network body ECU)
Headlight ECU sub-assembly LH

Headlight ECU sub-assembly LH

CAUTION / NOTICE / HINT

NOTICE:

If the headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information the headlight ECU sub-assembly LH.
Click here
Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
Click here
Before replacing the hybrid vehicle control ECU, refer to Registration.
Click here

PROCEDURE

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / HL AutoLeveling / Trouble Codes.

(e) Clear the DTCs.

Body Electrical > HL AutoLeveling > Clear DTCs

2.	CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / HL AutoLeveling / Trouble Codes.

(e) Check for DTCs.

Body Electrical > HL AutoLeveling > Trouble Codes

OK:

DTC B2456 is not output.

USE SIMULATION METHOD TO CHECK

3.	CHECK HYBRID VEHICLE CONTROL ECU

(a) Check if the part number of the hybrid vehicle control ECU installed to the vehicle is correct.

OK:

Part number is correct.

REPLACE HYBRID VEHICLE CONTROL ECU

4.	CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

(a) Check if the part number of the main body ECU (multiplex network body ECU) installed to the vehicle is correct.

OK:

Part number is correct.

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

Back-up Light Circuit

DESCRIPTION

The hybrid vehicle control ECU controls the back-up lights via the BKUP LP relay.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.
Before replacing the hybrid vehicle control ECU, refer to Registration.
Click here

PROCEDURE

1.	CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

(e) Check for DTCs.

Powertrain > Hybrid Control > Trouble Codes

Result	Proceed to
Hybrid control system DTCs are not output	A
Hybrid control system DTCs are output	B

GO TO HYBRID CONTROL SYSTEM

2.	CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - BODY GROUND)

(a) Disconnect the 4D instrument panel junction block assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
4D-3 - Body ground	Always	Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

(a) Disconnect the 4F instrument panel junction block assembly connector.

(b) Disconnect the A24 hybrid vehicle control ECU connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
A24-2 (BL) - 4F-19	Always	Below 1 Ω
A24-2 (BL) or 4F-19 - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	CHECK HYBRID VEHICLE CONTROL ECU (OUTPUT VOLTAGE)

*a	Component with harness connected (Instrument Panel Junction Block Assembly)

(a) Connect the A24 hybrid vehicle control ECU connector.

(b) Connect the 4D and 4F instrument panel junction block assembly connectors.

Standard Voltage:

Tester Connection	Condition	Specified Condition
4F-19 - Body ground	Power switch off, reverse (R) not selected	Below 1 V
4F-19 - Body ground	Power switch on (IG), reverse (R) selected	11 to 14 V

REPLACE HYBRID VEHICLE CONTROL ECU

5.	INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (OUTPUT VOLTAGE)

*a	Component with harness connected (Instrument Panel Junction Block Assembly)

(a) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
4H-10 - Body ground	Power switch off, reverse (R) not selected	Below 1 V
4H-10 - Body ground	Power switch on (IG), reverse (R) selected	11 to 14 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

Cornering Light Circuit

DESCRIPTION

The headlight ECU sub-assembly controls the cornering lights.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

If the headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information the headlight ECU sub-assembly LH.
Click here
If the headlight assembly LH has been replaced, it is necessary to synchronize the vehicle information the headlight ECU sub-assembly LH.
Click here

PROCEDURE

1.	CHECK LIGHTS

(a) Check the illumination of each cornering lights.

Result	Proceed to
LH side cornering light does not illuminate	A
RH side cornering light does not illuminate	B

GO TO STEP 5

2.	PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / HL AutoLeveling / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > HL AutoLeveling > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Cornering Light/Front Side Illuminate Light	Cornering light/front side illuminate light	OFF or ON	-

Body Electrical > HL AutoLeveling > Active Test

Tester Display
Cornering Light/Front Side Illuminate Light

OK:

Cornering light turn on.

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

3.	CHECK HEADLIGHT ASSEMBLY LH

(a) Remove each headlight ECU sub-assembly, interchange the headlight assembly LH with RH and connect the connectors.

Click here

4.	CHECK OPERATION (CORNERING LIGHT)

(a) Check that the cornering light operates normally.

Click here

OK:

Cornering light operates normally.

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH

REPLACE HEADLIGHT ASSEMBLY LH

5.	PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / HL AutoLeveling (Sub) / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > HL AutoLeveling (Sub) > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Cornering Light/Front Side Illuminate Light	Cornering light/front side illuminate light	OFF or ON	-

Body Electrical > HL AutoLeveling (Sub) > Active Test

Tester Display
Cornering Light/Front Side Illuminate Light

OK:

Cornering light turn on.

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

6.	CHECK HEADLIGHT ASSEMBLY RH

(a) Remove each headlight ECU sub-assembly, interchange the headlight assembly RH with LH and connect the connectors.

Click here

7.	CHECK OPERATION (CORNERING LIGHT)

(a) Check that the cornering light operates normally.

Click here

OK:

Cornering light operates normally.

REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH

REPLACE HEADLIGHT ASSEMBLY RH

Customize Parameters

CUSTOMIZE PARAMETERS

CUSTOMIZE LIGHTING SYSTEM (EXT) (for HV Model with Cornering Light)

NOTICE:

When the customer requests a change in a function, first make sure that the function can be customized.
Be sure to make a note of the current settings before customizing.
When troubleshooting a function, first make sure that the function is set to the default setting.

HINT:

The following items can be customized.

(a) Customizing with the Techstream

(1) Connect the Techstream to the DLC3.

(2) Turn the power switch on (IG).

(3) Turn the Techstream on.

(4) Enter the following menus: Customize Setting / Light Control or Warning.

(5) Select the setting by referring to the table below.

Light Control

Tester Display	Description	Default	Setting	ECU
Disp Ex ON Sen	Changes the ambient brightness level required to dim the lights such as the indicator lights of the combination meter, A/C indicator light and clock.*A	NORMAL	000:NORMAL,001:DARK2,010:DARK1,011:LIGHT1,100:LIGHT2	Main Body ECU (Multiplex Network Body ECU)
Disp Ex OFF Sen	Changes the ambient brightness level required to cancel the dimming of the lights such as the indicator lights of the combination meter, A/C indicator light and clock.*B	NORMAL	000:NORMAL,001:DARK2,010:DARK1,011:LIGHT1,100:LIGHT2	Main Body ECU (Multiplex Network Body ECU)
Light Auto OFF Delay	Keeps the headlights on for a certain period of time after turning the power switch off and closing all of doors with the low beam headlights on.	30 s	00:OFF,01:30 s,10:60 s,11:90 s	Main Body ECU (Multiplex Network Body ECU)
Sensitivity	Adjusts the sensitivity of the automatic light control system.*C	Normal	000:Normal,001:Dark2,010:Dark1,011:Light1,100:Light2	Main Body ECU (Multiplex Network Body ECU)
DRL Function	Turns the DRL function on/off.*	ON	0:OFF,1:ON	Main Body ECU (Multiplex Network Body ECU)
Light up Clearance Lights at Door Unlock Function	Turns on the parking lights and the taillights for 15 seconds when a door unlock operation is performed.	ON	0:OFF,1:ON	Main Body ECU (Multiplex Network Body ECU)
Headlight in Conjunction with Wiper	Turns the low beam headlights on/off according to wiper operation.	ON	0:OFF,1:ON	Main Body ECU (Multiplex Network Body ECU)
Tail Remind Buzzer Function	Sounds a buzzer when the driver door is opened with the light control switch in the tail or head position.	ON	0:OFF,1:ON	Main Body ECU (Multiplex Network Body ECU)

*: for vehicles with customize setting "DRL Function"

HINT:

The sensitivity adjustment may be difficult to confirm. Check by driving the vehicle.

Warning

Tester Display	Description	Default	Setting	ECU
Lane Change Flashing Times Adjust	Function to change the lane change flashing times.	3	$00:OFF,$01:3,$02:4,$03:5,$04:6,$05:7	Combination Meter Assembly

(b) Customizing with the multi-display

(1) Turn the power switch on (IG).

(2) Enter the following menus: MENU / Setup / Vehicle / Vehicle Customization / Lights Settings.

(3) Select the setting by referring to the table below.

Display	Default	Content	Setting	Relevant ECU
Headlights Auto-on Sensitivity	0	Adjusts the sensitivity of the automatic light control system.*A	-2, -1, 0, +1 or +2	Main Body ECU (Multiplex Network Body ECU)
Headlights Auto-off Timer	30 sec.	Keeps the headlights on for a certain period of time after turning the power switch off and closing all of doors with the low beam headlights on.	Off, 30 sec., 60 sec. or 90 sec.	Main Body ECU (Multiplex Network Body ECU)
Daytime Running Lights*	On	Turns the DRL function on/off.	On or Off	Main Body ECU (Multiplex Network Body ECU)

*: for vehicles with customize setting "Daytime Running Lights"

HINT:

The sensitivity adjustment may be difficult to confirm. Check by driving the vehicle.

Data List / Active Test

DATA LIST / ACTIVE TEST

DATA LIST

NOTICE:

In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

HINT:

Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus:

(1) for Main Body: Body Electrical / Main Body / Data List.

(2) for HL AutoLeveling: Body Electrical / HL AutoLeveling / Data List.

(3) for HL AutoLeveling (Sub): Body Electrical / HL AutoLeveling (Sub) / Data List.

(4) for Steering Angle Sensor: Chassis / Steering Angle Sensor / Data List.

(5) for Combination Meter: Body Electrical / Combination Meter / Data List.

(6) for Front Recognition Camera: Chassis / Front Recognition Camera / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Main Body > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Auto High Beam Main Switch	Auto high beam switch signal	OFF or ON	OFF: Auto high beam switch not pressed ON: Auto high beam switch pressed	-
Head Light SW (Head)	Light control switch head position signal	OFF or ON	OFF: Light control switch not in head position ON: Light control switch in head position	-
Insolation Amount of Solar Sensor RH	Solar sensor RH condition	0 to 51100 or SensorFail	Condition can be displayed	-
Insolation Amount of Solar Sensor LH	Solar sensor LH condition	0 to 51100 or SensorFail	Condition can be displayed	-
Light Sensor Illuminance	Light control sensor illuminance	0 to 8191 lx or SensorFail	Value is output according to ambient light level	-
Light Sensor Connection Status	Light control sensor connection status	OFF or ON	OFF: Automatic light control sensor has not been connected ON: Automatic light control sensor connected or has been connected	-
Headlight Lighting Function	ECU which controls the lighting system	Main Body or Lighting Sys ECU	Main Body: Lighting system controlled by main body ECU (multiplex network body ECU) Lighting Sys ECU: Lighting system is controlled by headlight ECU sub-assembly	-
Sensitivity	Sensitivity of the automatic light control system	Light2, Light1, Normal, Dark1 or Dark2	Customize setting displayed	-
DRL Function	Setting of the DRL function on/off	OFF or ON	Customize setting displayed	for vehicles with customize setting "DRL Function"
Headlight in Conjunction with Wiper	Wiper-linked low beam headlight control	OFF or ON	Customize setting displayed	-
Disp Ex ON Sen	Ambient brightness level required to dim display lights (combination meter, navigation display, etc.)	Light2, Light1, Normal, Dark1 or Dark2	Customize setting displayed	-
Disp Ex OFF Sen	Ambient brightness level required to cancel dimming display lights (combination meter, navigation display, etc.)	Light2, Light1, Normal, Dark1 or Dark2	Customize setting displayed	-
Light Auto OFF Delay	Light auto OFF delay	Off, 30 s, 60 s or 90 s	Customize setting displayed	-
Auto H Beam STS0	Automatic high beam sensor current state	Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin or LIN Err	Condition can be displayed*	If the value of this item is not as specified, the automatic high beam sensor system may be malfunctioning.
Auto H Beam STS1	Automatic high beam sensor state past 1	Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin or LIN Err	Condition can be displayed*	Although this item is displayed on the Techstream, it is not applicable to this vehicle.
Auto H Beam STS2	Automatic high beam sensor state past 2	Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin or LIN Err	Condition can be displayed*	Although this item is displayed on the Techstream, it is not applicable to this vehicle.
Auto H Beam STS3	Automatic high beam sensor state past 3	Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin or LIN Err	Condition can be displayed*	Although this item is displayed on the Techstream, it is not applicable to this vehicle.
Auto H Beam STS4	Automatic high beam sensor state past 4	Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin or LIN Err	Condition can be displayed*	Although this item is displayed on the Techstream, it is not applicable to this vehicle.
Auto H Beam STS5	Automatic high beam sensor state past 5	Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin or LIN Err	Condition can be displayed*	Although this item is displayed on the Techstream, it is not applicable to this vehicle.
Auto H Beam STS6	Automatic high beam sensor state past 6	Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin or LIN Err	Condition can be displayed*	Although this item is displayed on the Techstream, it is not applicable to this vehicle.
Auto H Beam STS7	Automatic high beam sensor state past 7	Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin or LIN Err	Condition can be displayed*	Although this item is displayed on the Techstream, it is not applicable to this vehicle.
Light up Clearance Lights at Door Unlock Function	Setting of the welcome light illumination control customize setting	OFF or ON	Customize setting displayed	-
Tail Remind Buzzer Function	Setting of the tail remind buzzer function on/off	OFF or ON	Customize setting displayed	-
The Number of DTC	Number of trouble codes	0 to 255	Number of stored DTCs displayed	-

HINT:

*: The details of each value of the Range are as follows:

Display Value	Condition	Control Condition	Diagnostic Note
Undetec	Automatic high beam sensor being initialized	Control suspended (low beam headlights illuminated)	-
CAM NA	Automatic high beam sensor temporarily disabled due to high temperature, unclear image (due to dirt, fog, etc.), etc.	Control suspended (low beam headlights illuminated)	-
No sens	No lights detected	High beam headlights illuminated	Only when vehicle speed within operation speed range
Hlight	Headlights of oncoming vehicle, etc. detected	Low beam headlights illuminated	Only when vehicle speed within operation speed range
Taillgt	Taillights preceding vehicle, etc. detected	Low beam headlights illuminated	Only when vehicle speed within operation speed range
Speed	No lights detected and vehicle speed below operation speed	Low beam headlights illuminated	-
Daytime	Bright light detected	Low beam headlights illuminated	-
Village	Streetlights, etc. detected	Low beam headlights illuminated	Only when vehicle speed within operation speed range
Delay	Changing between low beams and high beams	Changing between low beams and high beams	Only when vehicle speed within operation speed range
SAE Mod	Not applicable	-	-
Malfunc
Aim Lmt
Undefin
LIN Err

Body Electrical > HL AutoLeveling > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Headlight Low Beam State	Low beam headlight state	OFF or ON	OFF: Low beam headlights off ON: Low beam headlights on	-
Headlight High Beam State	High beam headlight state	OFF or ON	OFF: High beam headlights off ON: High beam headlights on	-
+B	Headlight ECU sub-assembly LH IG power supply voltage value	0.00 to 19.75 V	11.00 to 14.00 V	-
Front Right Wheel Speed Value	Front right wheel speed	0.00 to 260.00 km/h (162.00 mph)	Condition can be displayed	-
Front Left Wheel Speed Value	Front left wheel speed	0.00 to 260.00 km/h (162.00 mph)	Condition can be displayed	-
Vehicle Speed	Vehicle speed	0.00 to 260.00 km/h (162.00 mph)	Condition can be displayed	-
Steering Sensor Signal	Steering sensor signal value	-384.0 to 382.5 deg	Changes according to the operation of the steering wheel	Turning left: Increases Turning right: Decreases
Steering Sensor Center Position	Steering sensor center position	-3072.0 to 3070.5 deg	0.0 deg (tires straight ahead)	-
+B Voltage Value	Headlight ECU sub-assembly LH +B power supply voltage value	0.00 to 19.75 V	11.00 to 14.00 V	-
Leveling Motor Target Position	Headlight leveling motor target position	0.0 to 102.3 %	10.0 to 90.0 %	Although this item is displayed on the Techstream, it is not applicable to this vehicle.
Steering Sensor Initialization Status	Steering sensor initialization state	Incomplete or Completed	Incomplete: Steering sensor zero point calibration incomplete Completed: Steering sensor zero point calibration complete	-
Clearance Light State	Parking light state	OFF or ON	OFF: Parking lights off ON: Parking lights on	-
Right Cornering Light/Front Side Illuminate Light State	Cornering light RH/front side illumination light RH state	OFF or ON	OFF: Cornering light RH/front side illumination light RH off ON: Cornering light RH/front side illumination light RH on	-
Left Cornering Light/Front Side Illuminate Light State	Cornering light LH/front side illumination light LH state	OFF or ON	OFF: Cornering light LH/front side illumination light LH off ON: Cornering light LH/front side illumination light LH on	-
DRL Operating State	Daytime running light state	OFF or ON	OFF: Daytime running lights off ON: Daytime running lights on	-
Number Of Trouble Codes	Number of trouble codes	0 to 255	Number of stored DTCs displayed	-

Body Electrical > HL AutoLeveling (Sub) > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Front Window Washer Switch	Windshield wiper switch assembly (washer switch) condition	OFF or ON	OFF: Windshield wiper switch assembly (washer switch) off ON: Windshield wiper switch assembly (washer switch) on	-
Headlight Cleaner Switch	Headlight cleaner switch condition	OFF or ON	OFF: Headlight cleaner switch off ON: Headlight cleaner switch on	Although the item is displayed on the Techstream, it is not applicable to the vehicle.
Headlight Low Beam State	Low beam headlight state	OFF or ON	OFF: Low beam headlights off ON: Low beam headlights on	-
Headlight High Beam State	High beam headlight state	OFF or ON	OFF: High beam headlights off ON: High beam headlights on	-
Clearance Light State	Parking light state	OFF or ON	OFF: Parking lights off ON: Parking lights on	-
DRL State(DRL Operating State)	Daytime running light state	OFF or ON	OFF: Daytime running lights off ON: Daytime running lights on	-
+B	Headlight ECU sub-assembly RH IG power supply voltage value	0.00 to 19.75 V	11.00 to 14.00 V	-
+B Voltage Value	Headlight ECU sub-assembly RH +B power supply voltage value	0.00 to 19.75 V	11.00 to 14.00 V	-
Number Of Trouble Codes	Number of trouble codes	0 to 255	Number of stored DTCs displayed	-

Chassis > Steering Angle Sensor > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Light OFF Switch	Light control switch DRL OFF position signal	OFF or ON	OFF: Light control switch not in DRL OFF position ON: Light control switch in DRL OFF position	-
Auto Light Switch	Light control switch AUTO position signal	OFF or ON	OFF: Light control switch not in AUTO position ON: Light control switch in AUTO position	-
Head Light Switch (Tail)	Light control switch tail position signal	OFF or ON	OFF: Light control switch in neither tail nor head position ON: Light control switch in tail or head position	-
Head Light Switch (Head)	Light control switch head position signal	OFF or ON	OFF: Light control switch not in head position ON: Light control switch in head position	-
High Beam Main Switch	Dimmer switch high position signal	OFF or ON	OFF: Dimmer switch not in high position ON: Dimmer switch in high position	-
Passing Light Switch	Dimmer switch high flash position (pass) signal	OFF or ON	OFF: Dimmer switch not in high flash position ON: Dimmer switch in high flash position	-
Auto High Beam Main Switch	Auto high beam switch signal	OFF or ON	OFF: Auto high beam switch off ON: Auto high beam switch on	Although the item is displayed on the Techstream, it is not applicable to the vehicle.
Turn Signal Switch (Right)	Turn signal switch (right turn position) signal	OFF or ON	OFF: Turn signal switch not in right turn position ON: Turn signal switch in right turn position	-
Turn Signal Switch (Left)	Turn signal switch (left turn position) signal	OFF or ON	OFF: Turn signal switch not in left turn position ON: Turn signal switch in left turn position	-
Cornering Light/Front Side Illuminate Light Switch	Turn signal switch (full turn) signal	OFF or ON	OFF: Turn signal switch not in left or right turn position ON: Turn signal switch in left or right full turn position	-
Front Fog Light Switch	Front fog light switch signal	OFF or ON	OFF: Front fog light switch off ON: Front fog light switch on	Although the item is displayed on the Techstream, it is not applicable to the vehicle.
Rear Fog Light/Bad Weather Switch	Rear fog light switch signal	OFF or ON	OFF: Rear fog light switch off ON: Rear fog light switch on	Although the item is displayed on the Techstream, it is not applicable to the vehicle.
Automatic Light Equipped Info	Automatic light control system specification information	Unknown, With or Without	Unknown: Specification not stored With: Automatic light control system equipped Without: Automatic light control system not equipped	-
Bad Weather Mode Equipped Info	Bad weather specification information	Unknown, Without or With	Unknown: Specification not stored Without: Bad weather specification not equipped With: Bad weather specification equipped	Although the item is displayed on the Techstream, it is not applicable to the vehicle.
The Number of DTCs	Number of trouble codes	0 to 255	Number of stored DTCs displayed	-

Body Electrical > Combination Meter > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Turn Signal Switch (Left)	Turn signal switch (left) signal	OFF or ON	OFF: Turn signal switch not in left turn position ON: Turn signal switch in left turn position	Although this item is displayed on the Techstream, it is not applicable to this vehicle.
Turn Signal Switch (Right)	Turn signal switch (right) signal	OFF or ON	OFF: Turn signal switch not in right turn position ON: Turn signal switch in right turn position	Although this item is displayed on the Techstream, it is not applicable to this vehicle.
Turn Switch Signal (Full Turn)	Turn signal switch (full turn) signal	OFF or ON	OFF: Turn signal switch not in left or right turn position ON: Turn signal switch in left or right turn position	Although this item is displayed on the Techstream, it is not applicable to this vehicle.
Hazard Flasher Switch	Hazard warning signal switch signal	OFF or ON	OFF: Hazard warning signal switch off ON: Hazard warning signal switch on	-
Lane Change Flashing Times Adjust	Condition of the lane change flashing times	OFF, 3, 4, 5, 6 or 7	Customize setting displayed	-

Chassis > Front Recognition Camera > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

High Temperature Status1

High temperature malfunction status

OFF or ON

OFF: Forward recognition camera high temperature malfunction does not exist

ON: Forward recognition camera high temperature malfunction exists

ACTIVE TEST

HINT:

Using the Techstream to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests.

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus:

(1) for Main Body: Body Electrical / Main Body / Active Test.

(2) for HL AutoLeveling: Body Electrical / HL AutoLeveling / Active Test.

(3) for HL AutoLeveling (Sub): Body Electrical / HL AutoLeveling (Sub) / Active Test.

(4) for Combination Meter: Body Electrical / Combination Meter / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > Main Body > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Daytime Running Light	Daytime running lights	OFF or ON	-
Taillight Relay	Taillight relay	OFF or ON	-
Headlight Relay	Low beam headlights	OFF or ON	-
Head Light Hi	High beam headlights	OFF or ON	-
Rear Fog Light Relay	Rear fog lights	OFF or ON	Although this item is displayed on the Techstream, it is not applicable to this vehicle.
Automatic High Beam Switch Light	Auto high beam switch indicator light	OFF or ON	-

Body Electrical > HL AutoLeveling > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Drive The Leveling Motor	Headlight leveling motor upward or downward operation	Stop, Down or Up	Although this item is displayed on the Techstream, it is not applicable to this vehicle.
Headlight Leveling Indicator	"Headlight System Malfunction Visit Your Dealer" display	OFF or ON	-
Clearance Light	Parking lights	OFF or ON	-
Headlight Low Beam	Low beam headlights	OFF or ON	-
Headlight High Beam	High beam headlights	OFF or ON	-
Daytime Running Light	Daytime running lights	OFF or ON	-
Cornering Light/Front Side Illuminate Light	Cornering light/front side illuminate light	OFF or ON	-

Body Electrical > HL AutoLeveling (Sub) > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Headlight Cleaner	Operate headlight cleaner motor and pump assembly	OFF or ON	Although this item is displayed on the Techstream, it is not applicable to this vehicle.
Clearance Light	Parking lights	OFF or ON	-
Headlight Low Beam	Low beam headlights	OFF or ON	-
Headlight High Beam	High beam headlights	OFF or ON	-
Daytime Running Light	Daytime running lights	OFF or ON	-
Cornering Light/Front Side Illuminate Light	Cornering light/front side illumination light	OFF or ON	-

Body Electrical > Combination Meter > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Multi Display All (White)	Multi-information display (White display)	OFF or ON	-

Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART

Lighting System (for HV Model with Cornering Light)

DTC No.	Detection Item	DTC Output from
B1244	Light Sensor Circuit	Main body ECU (multiplex network body ECU)
B124B	Automatic High Beam System	Main body ECU (multiplex network body ECU)
B124C	Automatic High Beam Camera	Main body ECU (multiplex network body ECU)
B2414	Steering Position Sensor	Headlight ECU sub-assembly LH
B2415	Vehicle Speed Sensor	Headlight ECU sub-assembly LH
B242C	Right Headlight ECU Malfunction	Headlight ECU sub-assembly RH
B242D	Left Headlight ECU Malfunction	Headlight ECU sub-assembly LH
B242E	Open in IG Circuit	Headlight ECU sub-assembly LH
B242E	Open in IG Circuit	Headlight ECU sub-assembly RH
B242F	Open in B Power Line	Headlight ECU sub-assembly LH
B242F	Open in B Power Line	Headlight ECU sub-assembly RH
B2439	Headlight LH Circuit	Headlight ECU sub-assembly LH
B243A	Headlight RH Circuit	Headlight ECU sub-assembly RH
B243D	Left Low Beam Fan Malfunction	Headlight ECU sub-assembly LH
B243E	Right Low Beam Fan Malfunction	Headlight ECU sub-assembly RH
B2451	Variation Code not Written	Headlight ECU sub-assembly LH
B2456	Left Headlight ECU Variation Error	Headlight ECU sub-assembly LH
U0073	Control Module Communication Bus Off	Headlight ECU sub-assembly LH
U0073	Control Module Communication Bus OFF	Headlight ECU sub-assembly RH
U0100	Lost Communication With ECM/PCM "A"	Main body ECU (multiplex network body ECU)
U0101	Lost Communication with TCM	Headlight ECU sub-assembly LH
U0101	Lost Communication with TCM	Main body ECU (multiplex network body ECU)
U0120	Lost Communication With Starter / Generator Control Module	Main body ECU (multiplex network body ECU)
U0126	Lost Communication with Steering Angle Sensor Module	Headlight ECU sub-assembly LH
U0126	Lost Communication with Steering Angle Sensor Module	Main body ECU (multiplex network body ECU)
U0126	Lost Communication with Steering Angle Sensor Module	Headlight ECU sub-assembly RH
U0129	Lost Communication with Brake System Control Module	Headlight ECU sub-assembly LH
U0129	Lost Communication with Brake System Control Module	Main body ECU (multiplex network body ECU)
U0142	Lost Communication with Body Control Module "B"	Headlight ECU sub-assembly LH
U0142	Lost Communication with Body Control Module "B"	Headlight ECU sub-assembly RH
U0151	Lost Communication with Restraints Control Module	Main body ECU (multiplex network body ECU)
U0155	Lost Communication with Instrument Panel Cluster (IPC) Control Module	Headlight ECU sub-assembly LH
U0155	Lost Communication with Instrument Panel Cluster (IPC) Control Module	Main body ECU (multiplex network body ECU)
U0155	Lost Communication with Instrument Panel Cluster (IPC) Control Module	Headlight ECU sub-assembly RH
U0163	Lost Communication with Navigation Control Module	Main body ECU (multiplex network body ECU)
U0164	Lost Communication with HVAC Control Module	Main body ECU (multiplex network body ECU)
U0182	Lost Communication with AFS	Main body ECU (multiplex network body ECU)
U0182	Lost Communication With Lighting Control Module Front	Headlight ECU sub-assembly RH
U0199	Lost Communication with "Door Control Module A"	Main body ECU (multiplex network body ECU)
U0200	Lost Communication with "Door Control Module B"	Main body ECU (multiplex network body ECU)
U0208	Lost Communication with "Seat Control Module A"	Main body ECU (multiplex network body ECU)
U023A	Lost Communication With Image Processing Module "A"	Main body ECU (multiplex network body ECU)
U0242	Lost Communication With Headlamp Control Module "B"	Headlight ECU sub-assembly LH
U0293	Lost Communication with Hybrid Vehicle Control System	Headlight ECU sub-assembly LH
U0293	Lost Communication With Hybrid Powertrain Control Module	Main body ECU (multiplex network body ECU)
U0327	Software Incompatibility with Vehicle Security Control Module	Main body ECU (multiplex network body ECU)
U1000	CAN Communication Failure (Message Registry)	Headlight ECU sub-assembly LH
U1000	CAN Communication Failure (Message Registry)	Headlight ECU sub-assembly RH
U1106	Lost Communication with Electric Parking Brake Module	Main body ECU (multiplex network body ECU)
U1115	Lost Communication with Tilt & Telescopic Module	Main body ECU (multiplex network body ECU)
U1117	Lost Communication with Accessory Gateway	Main body ECU (multiplex network body ECU)

Dtc Check / Clear

DTC CHECK / CLEAR

CHECK FOR DTC (MAIN BODY)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / Main Body / Trouble Codes.

Body Electrical > Main Body > Trouble Codes

(e) Check for DTCs.

CHECK FOR DTC (HL AUTOLEVELING)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / HL AutoLeveling / Trouble Codes.

Body Electrical > HL AutoLeveling > Trouble Codes

(e) Check for DTCs.

CHECK FOR DTC (HL AUTOLEVELING (SUB))

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / HL AutoLeveling (Sub) / Trouble Codes.

Body Electrical > HL AutoLeveling (Sub) > Trouble Codes

(e) Check for DTCs.

CLEAR DTC (MAIN BODY)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / Main Body / Trouble Codes.

Body Electrical > Main Body > Clear DTCs

(e) Clear the DTCs.

CLEAR DTC (HL AUTOLEVELING)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / HL AutoLeveling / Trouble Codes.

Body Electrical > HL AutoLeveling > Clear DTCs

(e) Clear the DTCs.

CLEAR DTC (HL AUTOLEVELING (SUB))

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / HL AutoLeveling (Sub) / Trouble Codes.

Body Electrical > HL AutoLeveling (Sub) > Clear DTCs

(e) Clear the DTCs.

Freeze Frame Data

FREEZE FRAME DATA

FREEZE FRAME DATA

(a) Whenever a lighting system (for HV Model with Cornering Light) DTC is stored, the headlight ECU sub-assembly stores the current vehicle state as freeze frame data.

CHECK FREEZE FRAME DATA

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus:

(1) Body Electrical / HL AutoLeveling / Trouble Codes.

Body Electrical > HL AutoLeveling > Trouble Codes

(2) Body Electrical / HL AutoLeveling (Sub) / Trouble Codes.

Body Electrical > HL AutoLeveling (Sub) > Trouble Codes

(e) Select a DTC to display its freeze frame data.

Body Electrical > HL AutoLeveling

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
+B	Headlight ECU sub-assembly LH IG power supply voltage value	0.00 to 19.75 V	11.00 to 14.00 V	-
+B Voltage Value	Headlight ECU sub-assembly LH +B power supply voltage value	0.00 to 19.75 V	11.00 to 14.00 V	-
Headlight Low Beam State	Low beam headlight state	OFF or ON	OFF: Low beam headlights off ON: Low beam headlights on	-
Headlight High Beam State	High beam headlight state	OFF or ON	OFF: High beam headlights off ON: High beam headlights on	-
Steering Sensor Signal	Steering sensor signal value	-384.0 to 382.5 deg	Changes according to the operation of the steering wheel	Turning left: Increases Turning right: Decreases
Front Right Wheel Speed Value	Front right wheel speed	0.00 to 260.00 km/h (162.00 mph)	Condition can be displayed	-
Front Left Wheel Speed Value	Front left wheel speed	0.00 to 260.00 km/h (162.00 mph)	Condition can be displayed	-
Vehicle Acceleration	Vehicle acceleration	-445.64 to 445.63 m/s2	Condition can be displayed	-
Clearance Light State	Parking light state	OFF or ON	OFF: Parking lights off ON: Parking lights on	-
Right Cornering Light/Front Side Illuminate Light State	Cornering light RH/front side illumination light RH state	OFF or ON	OFF: Cornering light RH/front side illumination light RH off ON: Cornering light RH/front side illumination light RH on	-
Left Cornering Light/Front Side Illuminate Light State	Cornering light LH/front side illumination light LH state	OFF or ON	OFF: Cornering light LH/front side illumination light LH off ON: Cornering light LH/front side illumination light LH on	-
DRL Operating State	Daytime running light state	OFF or ON	OFF: Daytime running lights off ON: Daytime running lights on	-
Number Of Trouble Codes	Number of trouble codes	0 to 255	Number of stored DTCs displayed	-

Body Electrical > HL AutoLeveling (Sub)

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
+B	Headlight ECU sub-assembly RH IG power supply voltage value	0.00 to 19.75 V	11.00 to 14.00 V	-
+B Voltage Value	Headlight ECU sub-assembly RH +B power supply voltage value	0.00 to 19.75 V	11.00 to 14.00 V	-
Headlight Low Beam State	Low beam headlight state	OFF or ON	OFF: Low beam headlights off ON: Low beam headlights on	-
Headlight High Beam State	High beam headlight state	OFF or ON	OFF: High beam headlights off ON: High beam headlights on	-
Clearance Light State	Parking light state	OFF or ON	OFF: Parking lights off ON: Parking lights on	-
DRL State(DRL Operating State)	Daytime running light state	OFF or ON	OFF: Daytime running lights off ON: Daytime running lights on	-
Number Of Trouble Codes	Number of trouble codes	0 to 255	Number of stored DTCs displayed	-

CLEAR FREEZE FRAME DATA

NOTICE:

Clearing the DTCs will also clear the freeze frame data.

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus:

(1) Body Electrical / HL AutoLeveling / Clear DTCs.

Body Electrical > HL AutoLeveling > Clear DTCs

(2) Body Electrical / HL AutoLeveling (Sub) / Clear DTCs.

Body Electrical > HL AutoLeveling (Sub) > Clear DTCs

Front Side Marker Light Circuit

DESCRIPTION

When the light control switch is in the tail or head position, the main body ECU (multiplex network body ECU) sends an illumination request signal to the headlight ECU sub-assembly LH/RH to illuminate the front side marker lights.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

If the headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information the headlight ECU sub-assembly LH.
Click here
If the headlight assembly LH has been replaced, it is necessary to synchronize the vehicle information the headlight ECU sub-assembly LH.
Click here

PROCEDURE

1.	CHECK LIGHTS

(a) Check the illumination of each front side marker lights.

Result	Proceed to
LH side front side marker light does not illuminate	A
RH side front side marker light does not illuminate	B

GO TO STEP 5

2.	PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / HL AutoLeveling / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > HL AutoLeveling > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Clearance Light	Parking lights	OFF or ON	-

Body Electrical > HL AutoLeveling > Active Test

Tester Display
Clearance Light

OK:

Front side marker light illuminate.

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

3.	CHECK HEADLIGHT ASSEMBLY LH

(a) Remove each headlight ECU sub-assembly, interchange the headlight assembly LH with RH and connect the connectors.

Click here

4.	CHECK OPERATION (FRONT SIDE MARKER LIGHT)

(a) Check that the front side marker light operates normally.

OK:

Front side marker light operates normally.

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH

REPLACE HEADLIGHT ASSEMBLY LH

5.	PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / HL AutoLeveling (Sub) / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > HL AutoLeveling (Sub) > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Clearance Light	Parking lights	OFF or ON	-

Body Electrical > HL AutoLeveling (Sub) > Active Test

Tester Display
Clearance Light

OK:

Front side marker light illuminate.

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

6.	CHECK HEADLIGHT ASSEMBLY RH

(a) Remove each headlight ECU sub-assembly, interchange the headlight assembly RH with LH and connect the connectors.

Click here

7.	CHECK OPERATION (FRONT SIDE MARKER LIGHT)

(a) Check that the front side marker light operates normally.

OK:

Front side marker light operates normally.

REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH

REPLACE HEADLIGHT ASSEMBLY RH

Hazard Warning Switch Circuit

DESCRIPTION

The combination meter assembly receives the hazard warning signal switch (radio and display receiver assembly) on signal and controls the operation of the hazard warning lights.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

PROCEDURE

1.	READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / Combination Meter / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Combination Meter > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Hazard Flasher Switch

Hazard warning signal switch signal

OFF or ON

OFF: Hazard warning signal switch off

ON: Hazard warning signal switch on

Body Electrical > Combination Meter > Data List

Tester Display
Hazard Flasher Switch

OK:

Normal conditions listed above are displayed.

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

2.	INSPECT HAZARD WARNING SIGNAL SWITCH (RADIO AND DISPLAY RECEIVER ASSEMBLY)

(a) Remove the hazard warning signal switch (radio and display receiver assembly).

Click here

(b) Inspect the hazard warning signal switch (radio and display receiver assembly).

Click here

REPLACE HAZARD WARNING SIGNAL SWITCH (RADIO AND DISPLAY RECEIVER ASSEMBLY)

3.	CHECK HARNESS AND CONNECTOR (HAZARD WARNING SIGNAL SWITCH (RADIO AND DISPLAY RECEIVER ASSEMBLY) - COMBINATION METER ASSEMBLY AND BODY GROUND)

(a) Disconnect the G15 combination meter assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
G20-7 (TB) - G15-3 (HAZ)	Always	Below 1 Ω
G20-7 (TB) or G15-3 (HAZ) - Body ground	Always	10 kΩ or higher
G20-6 (GND) - Body ground	Always	Below 1 Ω

REPLACE COMBINATION METER ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

Headlight Dimmer Switch Circuit

DESCRIPTION

The steering sensor receives the following switch information:

Light control switch in DRL OFF, tail, head or AUTO position
Dimmer switch in high, low or high flash (pass) position

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Before replacing the main body ECU (multiplex network body ECU), refer to Registration.

Click here

PROCEDURE

1.	READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Chassis / Steering Angle Sensor / Data List.

(e) Read the Data List according to the display on the Techstream.

Chassis > Steering Angle Sensor > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Light OFF Switch	Light control switch DRL OFF position signal	OFF or ON	OFF: Light control switch not in DRL OFF position ON: Light control switch in DRL OFF position	-
Auto Light Switch	Light control switch AUTO position signal	OFF or ON	OFF: Light control switch not in AUTO position ON: Light control switch in AUTO position	-
Head Light Switch (Tail)	Light control switch tail position signal	OFF or ON	OFF: Light control switch in neither tail nor head position ON: Light control switch in tail or head position	-
Head Light Switch (Head)	Light control switch head position signal	OFF or ON	OFF: Light control switch not in head position ON: Light control switch in head position	-
High Beam Main Switch	Dimmer switch high position signal	OFF or ON	OFF: Dimmer switch not in high position ON: Dimmer switch in high position	-
Passing Light Switch	Dimmer switch high flash position (pass) signal	OFF or ON	OFF: Dimmer switch not in high flash position ON: Dimmer switch in high flash position	-

Chassis > Steering Angle Sensor > Data List

Tester Display
Light OFF Switch
Auto Light Switch
Head Light Switch (Tail)
Head Light Switch (Head)
High Beam Main Switch
Passing Light Switch

OK:

Normal conditions listed above are displayed.

GO TO STEP 5

2.	READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / Main Body / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Main Body > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Head Light SW (Head)

Light control switch head position signal

OFF or ON

OFF: Light control switch not in head position

ON: Light control switch in head position

Body Electrical > Main Body > Data List

Tester Display
Head Light SW (Head)

OK:

Normal conditions listed above are displayed.

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

3.	INSPECT STEERING SENSOR

Component without harness connected

(Steering Sensor)

(a) Remove the steering sensor.

Click here

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
G48-7 (HEAD) - z4-4 (H)	Always	Below 1 Ω

REPLACE STEERING SENSOR

4.	CHECK HARNESS AND CONNECTOR (STEERING SENSOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Disconnect the G33 main body ECU (multiplex network body ECU) connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
G48-7 (HEAD) - G33-16 (HEAD)	Always	Below 1 Ω
G48-7 (HEAD) or G33-16 (HEAD) - Body ground	Always	10 kΩ or higher

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.	INSPECT TURN SIGNAL SWITCH

(a) Remove the turn signal switch.

Click here

(b) Inspect the turn signal switch.

Click here

REPLACE TURN SIGNAL SWITCH

6.	INSPECT STEERING WHEEL SWITCH HOUSING

(a) Remove the steering wheel switch housing.

Click here

(b) Inspect the steering wheel switch housing.

Click here

REPLACE STEERING SENSOR

REPLACE STEERING WHEEL SWITCH HOUSING

High Beam Headlight Circuit

DESCRIPTION

The headlight ECU sub-assembly controls the high beam headlights.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

If the headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information the headlight ECU sub-assembly LH.
Click here
If the headlight assembly LH has been replaced, it is necessary to synchronize the vehicle information the headlight ECU sub-assembly LH.
Click here

PROCEDURE

1.	CHECK LIGHTS

(a) Check the illumination of each high beam lights.

Result	Proceed to
LH side high beam light does not illuminate	A
RH side high beam light does not illuminate	B

GO TO STEP 5

2.	PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / HL AutoLeveling / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > HL AutoLeveling > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Headlight High Beam	High beam headlights	OFF or ON	-

Body Electrical > HL AutoLeveling > Active Test

Tester Display
Headlight High Beam

OK:

High beam headlight turn on.

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

3.	CHECK HEADLIGHT ASSEMBLY LH

(a) Remove each headlight ECU sub-assembly, interchange the headlight assembly LH with RH and connect the connectors.

Click here

4.	CHECK OPERATION (HIGH BEAM HEADLIGHT)

(a) Check that the high beam headlight operates normally.

OK:

High beam headlight operates normally.

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH

REPLACE HEADLIGHT ASSEMBLY LH

5.	PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / HL AutoLeveling (Sub) / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > HL AutoLeveling (Sub) > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Headlight High Beam	High beam headlights	OFF or ON	-

Body Electrical > HL AutoLeveling (Sub) > Active Test

Tester Display
Headlight High Beam

OK:

High beam headlight turn on.

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

6.	CHECK HEADLIGHT ASSEMBLY RH

(a) Remove each headlight ECU sub-assembly, interchange the headlight assembly RH with LH and connect the connectors.

Click here

7.	CHECK OPERATION (HIGH BEAM HEADLIGHT)

(a) Check that the high beam headlight operates normally.

OK:

High beam headlight operates normally.

REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH

REPLACE HEADLIGHT ASSEMBLY RH

How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

Use the following procedure to troubleshoot the lighting system (for HV Model with Cornering Light).
*: Use the Techstream.

PROCEDURE

1.	VEHICLE BROUGHT TO WORKSHOP

2.	CUSTOMER PROBLEM ANALYSIS

HINT:

In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.

The following 5 items are important points for problem analysis:

What	Vehicle model, system name
When	Date, time, occurrence frequency
Where	Road conditions
Under what conditions?	Driving conditions, weather conditions
How did it happen?	Problem symptoms

PRE-CHECK

(a) Measure the auxiliary battery voltage with the power switch off.

Standard Voltage:

11 to 14 V

If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.

(b) Check the fuses and relays.

(c) Check the connector connections and terminals to make sure that there are no abnormalities such as loose connections, deformation, etc.

4.	CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

(a) Using the Techstream, check for CAN communication system DTCs.

Click here

Result	Proceed to
CAN DTCs are not output	A
CAN DTCs are output	B

GO TO CAN COMMUNICATION SYSTEM

5.	CHECK FOR DTC*

(a) Check for DTCs.

Body Electrical > Main Body > Trouble Codes Body Electrical > HL AutoLeveling > Trouble Codes Body Electrical > HL AutoLeveling (Sub) > Trouble Codes

Result	Proceed to
DTCs are not output	A
DTCs are output	B

GO TO DIAGNOSTIC TROUBLE CODE CHART

6.	PROBLEM SYMPTOMS TABLE

(a) Refer to Problem Symptoms Table.

Click here

Result	Proceed to
Fault is not listed in Problem Symptoms Table	A
Fault is listed in Problem Symptoms Table	B

GO TO PROBLEM SYMPTOMS TABLE

7.	OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Operation Check.

Click here

(b) Terminals of ECU.

Click here

(d) On-vehicle Inspection.

(e) Inspection.

8.	ADJUST, REPAIR OR REPLACE

9.	CONFIRMATION TEST

END

Initialization

INITIALIZATION

NOTICE:

The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed or replaced during headlight ECU sub-assembly LH removal/installation are shown below.

Replaced Part or Performed Procedure	Necessary Procedures	Proceed to
Headlight ECU sub-assembly LH or headlight assembly LH	Synchronize the vehicle information	SYNCHRONIZE VEHICLE INFORMATION
Battery terminal is disconnected and connected.	Steering sensor zero point calibration

If the steering sensor zero point calibration is not performed, the cornering lights may not operate correctly.
A new headlight ECU sub-assembly LH cannot operate until the vehicle information is registered.
Even if the headlight ECU sub-assembly RH is replaced with a new one, it is not necessary to synchronize the vehicle information.
The lighting system (for HV Model with Cornering Light) uses the CAN communication system. First, confirm that there are no malfunctions in the CAN communication system. Refer to the How to Proceed with Troubleshooting procedure.
Click here

SYNCHRONIZE VEHICLE INFORMATION (When using the TECHSTREAM)

NOTICE:

If synchronization fails, make sure to turn the power switch off then back on (IG) before performing synchronization again.

(a) Turn the power switch off.

(b) Connect the Techstream to the DLC3.

(d) Check that the "Headlight Auto Leveling System Unavailable Visit Your Dealer" warning message is displayed on the multi-information display.

(e) Enter the following menus: Body Electrical / HL AutoLeveling / Utility / ECU Information Sync.

Body Electrical > HL AutoLeveling > Utility

Tester Display
ECU Information Sync

(f) Check the display on the Techstream and press "Next".

(g) Check that the "Headlight System Malfunction Visit Your Dealer" warning message continuously blinks 6 times at 2 Hz on the multi-information display.

HINT:

If the "Headlight System Malfunction Visit Your Dealer" warning message does not start blinking on the multi-information display after perform the procedure again.

(h) Press "Exit".

(i) Turn the power switch off.

NOTICE:

If synchronization fails, make sure to turn the power switch off then back on (IG) before performing synchronization again.

SYNCHRONIZE VEHICLE INFORMATION (When not using the TECHSTREAM)

(a) Turn the power switch on (IG).

(b) Check that the "Headlight Auto Leveling System Unavailable Visit Your Dealer" warning message is displayed on the multi-information display.

(c) Using the headlight dimmer switch, turn the low beam headlights on and off 8 times within 20 seconds after turning the power switch on (IG).

NOTICE:

If the low beam headlights illuminate when the power switch is on (IG), shine a light on the automatic light control sensor to turn the low beam headlights off before operating the headlight dimmer switch.

HINT:

If this step cannot be completed within 20 seconds, turn the power switch off. Then, turn the power switch on (IG) and restart the procedure.

(d) Check that the "Headlight System Malfunction Visit Your Dealer" warning message continuously blinks 6 times at 2 Hz on the multi-information display.

HINT:

If the "Headlight System Malfunction Visit Your Dealer" warning message does not start blinking on the multi-information display after perform the procedure again.

(e) Turn the power switch off.

Operation Check

OPERATION CHECK

AUTOMATIC LIGHT CONTROL SYSTEM OPERATION CHECK

NOTICE:

Make sure that the customize settings are set to default when performing the automatic light control system operation check.

Click here

(a) Turn the power switch on (IG).

(b) Turn the light control switch to the AUTO position.

(d) Check that the taillights and low beam headlights come on.

(e) Uncover the automatic light control sensor.

(f) Check that the low beam headlights and taillights turn off.

LIGHT AUTO TURN-OFF SYSTEM OPERATION CHECK

NOTICE:

Make sure that the customize settings are set to default when performing the light auto turn-off system operation check.

Click here

(a) When the taillights are on (low beam headlights are not on)

(1) Close all of the doors.

(2) Turn the power switch on (IG).

(3) Turn the taillights on.

(4) Turn the power switch off.

(5) Open the driver door.

(6) Check that all of the lights turn off immediately.

(b) When the low beam headlights are on

(1) Close all of the doors.

(2) Turn the power switch on (IG).

(3) Turn the low beam headlights on.

(4) Turn the power switch off.

(5) Open any of the doors.

(6) Close the door.

(7) Check that all of the lights turn off after 30 seconds (delay function).

HINT:

Before the lights turn off, if the lock button on the key is pushed after all of the doors are locked, all of the lights will turn off immediately.

DAYTIME RUNNING LIGHT SYSTEM OPERATION CHECK

NOTICE:

Make sure that the customize settings are set to default when performing the daytime running light system operation check.

Click here

(a) Turn the power switch on (READY).

(b) Turn the light control switch to the tail or AUTO position (with the low beam headlights not turned on via the automatic light control system).

(d) Check that the daytime running lights come on.

NOTICE:

Make sure that the customize settings are set to default when performing the wiper-linked low beam headlight control system operation check.

Click here

WIPER-LINKED LOW BEAM HEADLIGHT CONTROL SYSTEM OPERATION CHECK

(a) Turn the power switch on (IG).

(b) Shine a light on the automatic light control sensor.*

HINT:

*: If troubleshooting is being performed in a bright area, such as outside on a sunny day, it will not be necessary to perform this step.

(d) Operate the front wipers for 10 seconds or more (except MIST or washer-linked wiper operation) and check that the low beam headlights*1 or high beam headlights*2 illuminate.

*1: Dimmer switch high position
*2: Dimmer switch not high position

WELCOME LIGHT ILLUMINATION CONTROL OPERATION CHECK

NOTICE:

When operation of the alarm memory function is requested, welcome light illumination control will not operate.
Make sure that the customize settings are set to their default when performing the welcome light illumination control operation check.
Click here

(a) Turn the power switch off.

(b) Turn the light control switch to the AUTO position.

(d) Close and lock all of the doors.

(e) Unlock all of the doors using the wireless door unlock or entry door unlock function.

(f) Check that the taillights, parking lights, front side marker lights and license plate lights illuminate for 15 seconds.

CORNERING LIGHT CONTROL OPERATION CHECK

(a) Turn the power switch on (IG).

(b) Turn the light control switch to the head position.

(c) Perform the following operations while driving the vehicle at 150 km/h (93 mph) or less and check that the cornering lights operate appropriately.

Operate the left turn signal switch and check that the cornering light LH illuminates.*
Operate the right turn signal switch and check that the cornering light RH illuminates.*
Turn the steering wheel 25 degrees or more to the left and check that the cornering light LH illuminates. Turn the steering wheel to an angle of 10 degrees or less and check that the cornering light LH turns off.*
Turn the steering wheel 25 degrees or more to the right and check that the cornering light RH illuminates. Turn the steering wheel to an angle of 10 degrees or less and check that the cornering light RH turns off.*
Move the shift lever to R and check that the cornering light LH and cornering light RH illuminate.

NOTICE:

When disconnecting the cable from the auxiliary battery terminal, if the steering angle sensor steering neutral point is not stored, the cornering lights may not operate as listed above in *. When disconnecting the cable from the auxiliary battery terminal, perform the confirmation driving pattern to store the steering angle sensor steering neutral point.

Click here

*a	Automatic High Beam Indicator Light on Combination Meter Assembly
*b	Auto High Beam Switch Indicator

AUTOMATIC HIGH BEAM SYSTEM OPERATION CHECK

(a) Check the operation of the automatic high beam indicator light.

(1) Turn the power switch on (IG).

(2) Turn the light control switch to the AUTO or head position.

(3) Move the dimmer switch to the high position.

(4) Press the auto high beam switch (indicator illuminates).

HINT:

If the auto high beam switch is turned on when the light control switch is not in the AUTO or head position, or the dimmer switch is not in the high position, "Auto High Beam Ready Turn ON High Beam to Activate" will be displayed on the multi-information display.

(5) Check that the automatic high beam indicator illuminates.

NOTICE:

When the forward recognition camera cannot correctly detect objects due to inclement weather such as thick fog or other visual obstructions, the automatic high beam indicator may not turn on and consequently the automatic high beam system may not operate.

(b) Check the operation of the automatic high beam function.

(1) At night, when driving the vehicle with the automatic high beam system in standby mode, check that the high beams automatically turn on after a short delay when all of the following conditions are met:

The vehicle speed is more than approximately 34 km/h (21 mph).
The area in front of the vehicle is dark.
There are no oncoming vehicles with headlights on.
There are no preceding vehicles with taillights on.
There are few streetlights along the street ahead.

(2) At night, when driving the vehicle with the high beams turned on by the automatic high beam system, check that the automatic high beam system turns off the high beams and returns to standby mode when any of the following conditions are met:

The vehicle speed is less than approximately 27 km/h (17 mph).
The level of ambient light is higher than a specified threshold.
There are oncoming vehicles with headlights on.
There are preceding vehicles with taillights on.
Light from streetlights ahead is higher than a specified threshold.

Parking Light/Daytime Running Light Circuit

DESCRIPTION

Parking light function:

When the main body ECU (multiplex network body ECU) receives the light control switch position signal, it sends an illumination request signal to the headlight ECU sub-assembly LH/RH and illuminates the parking lights.

Daytime running light function:

When the operation conditions of the daytime running lights are met, the main body ECU (multiplex network body ECU) sends an illumination request signal to the headlight ECU sub-assembly LH/RH and illuminates the daytime running lights.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

If the headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information the headlight ECU sub-assembly LH.
Click here
If the headlight assembly LH has been replaced, it is necessary to synchronize the vehicle information the headlight ECU sub-assembly LH.
Click here

PROCEDURE

1.	CHECK LIGHTS

(a) Check the illumination of each parking lights and daytime running lights.

Result	Proceed to
LH side parking light and daytime running light does not illuminate	A
RH side parking light and daytime running light does not illuminate	B

GO TO STEP 5

2.	PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / HL AutoLeveling / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > HL AutoLeveling > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Clearance Light	Parking lights	OFF or ON	-
Daytime Running Light	Daytime running lights	OFF or ON	-

Body Electrical > HL AutoLeveling > Active Test

Tester Display
Clearance Light

Body Electrical > HL AutoLeveling > Active Test

Tester Display
Daytime Running Light

OK:

Parking lights and daytime running lights illuminate.

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

3.	CHECK HEADLIGHT ASSEMBLY LH

(a) Remove each headlight ECU sub-assembly, interchange the headlight assembly LH with RH and connect the connectors.

Click here

4.	CHECK OPERATION (PARKING LIGHTS AND DAYTIME RUNNING LIGHTS)

(a) Check the operation of the parking lights and daytime running lights.

OK:

The parking lights and daytime running lights operate normally.

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH

REPLACE HEADLIGHT ASSEMBLY LH

5.	PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / HL AutoLeveling (Sub) / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > HL AutoLeveling (Sub) > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Clearance Light	Parking lights	OFF or ON	-
Daytime Running Light	Daytime running lights	OFF or ON	-

Body Electrical > HL AutoLeveling (Sub) > Active Test

Tester Display
Clearance Light

Body Electrical > HL AutoLeveling (Sub) > Active Test

Tester Display
Daytime Running Light

OK:

Parking lights and daytime running lights illuminate.

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

6.	CHECK HEADLIGHT ASSEMBLY RH

(a) Remove each headlight ECU sub-assembly, interchange the headlight assembly RH with LH and connect the connectors.

Click here

7.	CHECK OPERATION (PARKING LIGHTS AND DAYTIME RUNNING LIGHTS)

(a) Check the operation of the parking lights and daytime running lights.

OK:

The parking lights and daytime running lights operate normally.

REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH

REPLACE HEADLIGHT ASSEMBLY RH

Parts Location

PARTS LOCATION

ILLUSTRATION

*1	SIDE TURN SIGNAL LIGHT ASSEMBLY LH	*2	SIDE TURN SIGNAL LIGHT ASSEMBLY RH
*3	HEADLIGHT ASSEMBLY LH - HEADLIGHT ECU SUB-ASSEMBLY LH	*4	HEADLIGHT ASSEMBLY RH - HEADLIGHT ECU SUB-ASSEMBLY RH
*5	FORWARD RECOGNITION CAMERA	*6	PARKING BRAKE ECU (BRAKE ACTUATOR ASSEMBLY)
*7	SKID CONTROL ECU (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY)	*8	NO. 1 ENGINE ROOM RELAY BLOCK AND NO. 1 JUNCTION BLOCK ASSEMBLY - H-LP LH RELAY - H-LP RH RELAY - H-LP LH FUSE - H-LP RH FUSE - DC/DC FUSE

ILLUSTRATION

*1	CENTER STOP LIGHT SET	*2	LICENSE PLATE LIGHT ASSEMBLY RH
*3	LICENSE PLATE LIGHT ASSEMBLY LH	*4	REAR COMBINATION LIGHT ASSEMBLY RH
*5	REAR COMBINATION LIGHT ASSEMBLY LH	*6	REAR LIGHT ASSEMBLY RH
*7	REAR LIGHT ASSEMBLY LH	*8	REAR COMBINATION LIGHT SOCKET AND WIRE
*9	REAR LIGHT CORD	*10	OUTER MIRROR CONTROL ECU ASSEMBLY RH
*11	OUTER MIRROR CONTROL ECU ASSEMBLY LH	-	-

ILLUSTRATION

*1	AUTO HIGH BEAM SWITCH	*2	AUTOMATIC LIGHT CONTROL SENSOR
*3	HAZARD WARNING SIGNAL SWITCH (RADIO AND DISPLAY RECEIVER ASSEMBLY)	*4	TURN SIGNAL SWITCH
*5	STOP LIGHT SWITCH ASSEMBLY	*6	STEERING WHEEL SWITCH HOUSING
*7	HYBRID VEHICLE CONTROL ECU	*8	STEERING SENSOR
*9	AIRBAG ECU ASSEMBLY	*10	MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
*11	DLC3	*12	COMBINATION METER ASSEMBLY
*13	INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - TAIL RELAY - BKUP LP RELAY - TAIL FUSE - BKUP LP FUSE - ECU-IG1 NO. 3 FUSE - ECU-B NO. 2 FUSE - ECU-DCC NO. 2 FUSE - HAZ FUSE - METER-IG2 FUSE - STOP FUSE	-	-

Precaution

PRECAUTION

PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL

NOTICE:

When disconnecting the cable from the negative (-) auxiliary battery terminal, initialize the following systems after the cable is reconnected.

System Name	See Procedure
Lane Departure Alert System (w/ Steering Control)
Intelligent Clearance Sonar System
Parking Assist Monitor System
Panoramic View Monitor System
Pre-collision System
Lighting System (for HV Model with Cornering Light)

PRECAUTIONS FOR LIGHTING SYSTEM

(a) If the headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information the headlight ECU sub-assembly LH.

Click here

(b) If the headlight assembly LH has been replaced, it is necessary to synchronize the vehicle information the headlight ECU sub-assembly LH.

Click here

PRECAUTION FOR AUTOMATIC HIGH BEAM SYSTEM

(a) General Description

The automatic high beam system is a system that helps ensure visibility by automatically turning the high beam headlights on and off. Additionally, due to control limitations of the automatic high beam system, it may be necessary to manually turn the high beam headlights on and off. For safety reasons, make sure to turn the high beam headlights on and off manually according to the driving conditions.

(b) Conditions Unsuitable for Using Automatic High Beam System

Under the following conditions, the automatic high beam system might not detect other vehicles or lights correctly, or the high beam headlights might cause glare or flash pedestrians or the occupants of other vehicles. Manual operation should be considered.

Factor	Condition
Weather/Climate	When driving in bad weather (rain, snow, fog, sandstorms, etc.).
Front windshield	When the windshield glass is not clear (ice, snow or frost on the glass). When the windshield glass is dirty (sand, mud, water stains or bugs on the glass). When the windshield glass is cracked. When the windshield glass is fogged-up. When the windshield glass has a film attached. When an object on the instrument panel reflects off of the windshield glass. When any other abnormal conditions exist with the windshield glass.
Forward recognition camera	When the forward recognition camera is deformed. When the forward recognition camera is dirty. When any other abnormal conditions exist with the forward recognition camera.
Nearby vehicles or lights	When lights similar to headlights or taillights are in the vicinity of the vehicle. When a nearby vehicle has no lights or its lights are off. When a vehicle in front has misaligned lights, or its lights are changing color. When a vehicle in front has extremely dirty headlights or taillights.
Road conditions	When driving in areas where the conditions often change between bright and dark. When driving on hilly roads. When driving on winding roads or around sharp curves. When driving on bumpy roads (cobblestone paving, gravel roads, rough unpaved roads, etc.). When highly reflective objects are in front of the vehicle (mirrors, road signs, etc.).
Own vehicle	When the headlights are damaged, deformed or dirty. When the vehicle posture is abnormal (posture has changed due to the vehicle being fully loaded, a trailer being towed, road conditions, etc.). When the vehicle has other malfunctions or has been modified.
Automatic high beam system	Malfunction: When the automatic high beam indicator light on the combination meter assembly is off and "Headlight System Malfunction Visit Your Dealer" is displayed on the multi-information display. Others: When the automatic high beam system does not seem to be turning the high beam headlights on and off properly. When the automatic high beam system is frequently turning the high beam headlights on and off. When the glare from the high beam headlights would disturb pedestrians or the drivers of other vehicles.

PRECAUTION FOR FRONT CAMERA SYSTEM

Click here

Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

NOTICE:

Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
Click here
If the headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information the headlight ECU sub-assembly LH.
Click here
If the headlight assembly LH has been replaced, it is necessary to synchronize the vehicle information the headlight ECU sub-assembly LH.
Click here
When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

HINT:

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.

Headlight

Symptom	Suspected Area	Link
Left low beam headlight does not illuminate	Headlight ECU sub-assembly LH
Left low beam headlight does not illuminate	Headlight assembly LH
Right low beam headlight does not illuminate	Headlight ECU sub-assembly RH
Right low beam headlight does not illuminate	Headlight assembly RH
Both left and right low beam headlights do not illuminate	Headlight dimmer switch circuit
Both left and right low beam headlights do not illuminate	Main body ECU (Multiplex network body ECU)
Left high beam headlight does not illuminate	High beam headlight circuit
Left high beam headlight does not illuminate	Headlight assembly LH
Right high beam headlight does not illuminate	High beam headlight circuit
Right high beam headlight does not illuminate	Headlight assembly RH
Both left and right high beam headlights do not illuminate	Headlight dimmer switch circuit
Both left and right high beam headlights do not illuminate	Main body ECU (Multiplex network body ECU)
High Flash (passing function) does not operate (high beam headlights are normal)	Headlight dimmer switch circuit
	Main body ECU (Multiplex network body ECU)
Left low beam headlight and high beam headlight do not illuminate	Headlight ECU sub-assembly LH
Right low beam headlight and high beam headlight do not illuminate	Headlight ECU sub-assembly RH

Parking Light/Daytime Running Light

Symptom	Suspected Area	Link
Left parking light/daytime running light does not illuminate	Parking light/daytime running light circuit
	Headlight ECU sub-assembly LH
Right parking light/daytime running light does not illuminate	Parking light/daytime running light circuit
	Headlight ECU sub-assembly RH
Both left and right parking lights do not illuminate	Headlight dimmer switch circuit
Both left and right parking lights do not illuminate	Main body ECU (Multiplex network body ECU)
Both left and right daytime running lights do not illuminate	Check customize settings
	Headlight dimmer switch circuit
	Main body ECU (Multiplex network body ECU)

Cornering Light

Symptom	Suspected Area	Link
Left cornering light does not illuminate	Check operating conditions
	Cornering light circuit
	Headlight ECU sub-assembly LH
Right cornering light does not illuminate	Check operating conditions
	Cornering light circuit
	Headlight ECU sub-assembly RH

Front Side Marker Light

Symptom	Suspected Area	Link
Left front side marker light does not illuminate	Front side marker light circuit
Left front side marker light does not illuminate	Headlight ECU sub-assembly LH
Right front side marker light does not illuminate	Front side marker light circuit
Right front side marker light does not illuminate	Headlight ECU sub-assembly RH
Both left and right front side marker lights do not illuminate	Headlight dimmer switch circuit
	Main body ECU (Multiplex network body ECU)

Taillight

Symptom	Suspected Area	Link
Left or right taillight (rear combination light assembly) does not illuminate	Rear combination light assembly
	Rear combination light socket and wire
	Harness or connector	-
Left or right taillight (rear light assembly) does not illuminate	Rear light assembly
	Rear light cord
	Harness or connector	-
All of the taillights, license plate lights and rear side marker lights do not illuminate	Headlight dimmer switch circuit
	Taillight relay circuit
	Main body ECU (Multiplex network body ECU)

Rear Side Marker Light

Symptom	Suspected Area	Link
Left or right rear side marker light does not illuminate	Rear combination light assembly
Left or right rear side marker light does not illuminate	Rear combination light socket and wire

License Plate Light

Symptom	Suspected Area	Link
License plate light does not illuminate	License plate light assembly
License plate light does not illuminate	Harness or connector	-

Stop Light

Symptom	Suspected Area	Link
Left or right stop light (rear combination light assembly) does not illuminate	Rear combination light assembly
	Rear combination light socket and wire
	Harness or connector	-
Left or right stop light (rear light assembly) does not illuminate	Rear light assembly
	Rear light cord
	Harness or connector	-
All of the stop lights do not illuminate	STOP fuse	-
	Stop light switch assembly
	Harness or connector	-

High Mounted Stop Light

Symptom	Suspected Area	Link
High mounted stop light does not illuminate	Center stop light set
High mounted stop light does not illuminate	Harness or connector	-

Back-up Light

Symptom	Suspected Area	Link
Left or right back-up light does not illuminate	Rear light assembly
	Rear light cord
	Harness or connector	-
Both left and right back-up lights do not illuminate	Back-up light circuit

Turn Signal Light

Symptom	Suspected Area	Link
Left or right front turn signal light does not operate	Headlight ECU sub-assembly
	Headlight assembly
	Harness or connector	-
Left or right rear turn signal light does not operate	Rear combination light assembly
	Rear combination light socket and wire
	Rear light assembly
	Rear light cord
	Harness or connector	-
Left or right side turn signal light does not operate	Side turn signal light assembly
	Outer rear view mirror assembly
	Outer mirror control ECU assembly
	Harness or connector	-
Turn signal lights do not operate in one direction	Turn signal switch circuit
Turn signal lights do not operate in one direction	Meter/gauge system
All turn signal lights do not operate	Turn signal switch circuit
All turn signal lights do not operate	Combination meter assembly
All turn signal lights do not flash at the correct speed	Combination meter assembly

Hazard Warning Signal Light

Symptom	Suspected Area	Link
Hazard warning signal lights do not operate	Hazard warning switch circuit
Hazard warning signal lights do not operate	Combination meter assembly

Automatic Light Control System

Symptom	Suspected Area	Link
Automatic light control system does not operate	Headlight dimmer switch circuit
Automatic light control system does not operate	Main body ECU (Multiplex network body ECU)

Light Auto Turn-off System

Symptom	Suspected Area	Link
Light auto turn-off system does not operate	Headlight dimmer switch circuit
	IG signal circuit
	Front door courtesy switch circuit
	Main body ECU (Multiplex network body ECU)

Remote Operation Function (w/ Telematics System)

Symptom	Suspected Area	Link
Lights do not operate using remote operation function (lighting system is normal)	Telematics system

Wiper-linked Low Beam Headlight Control System

Symptom	Suspected Area	Link
Wiper-linked low beam headlight control system does not operate	Check customize settings
	Main body ECU (Multiplex network body ECU)

Welcome Light Illumination Control

Symptom	Suspected Area	Link
Welcome light illumination control does not operate	Check customize settings
Welcome light illumination control does not operate	Main body ECU (Multiplex network body ECU)

Automatic High Beam System

Symptom	Suspected Area	Link
Automatic high beam system does not operate or automatic high beam indicator does not illuminate (low beam headlights and high beam headlights are normal)	Check millimeter wave radar sensor assembly
	Check Data List (High Temperature Status1)
	Check automatic high beam indicator light
	Check Data List (Auto H Beam STS0)
	Perform Active Test (Multi Display All (White))
	Auto high beam switch
	Harness or connector
	Combination meter assembly
	Forward recognition camera
	Main body ECU (Multiplex network body ECU)
Auto high beam switch indicator does not come ON	Refer to "Automatic High Beam Switch Indicator does not Come ON"

System Diagram

SYSTEM DIAGRAM

HEADLIGHT ASSEMBLY CIRCUIT

Taillight Relay Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) controls the operation of the TAIL relay.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.
Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
Click here

PROCEDURE

1.	PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / Main Body / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > Main Body > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Taillight Relay	Taillight relay	OFF or ON	-

Body Electrical > Main Body > Active Test

Tester Display
Taillight Relay

OK:

Taillights illuminate.

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

2.	CHECK HARNESS AND CONNECTOR (POWER SOURCE - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

(a) Disconnect the 4K instrument panel junction block assembly connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
4K-1 - Body ground	Power switch off	11 to 14 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

Component without harness connected

(Instrument Panel Junction Block Assembly)

(a) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

Click here

(b) Connect a positive (+) lead from the auxiliary battery to terminal 4K-1.

(d) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
4H-30 - Auxiliary battery negative (-) terminal	Always	11 to 14 V

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

Terminals Of Ecu

TERMINALS OF ECU

CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

(a) Disconnect the instrument panel junction block assembly and main body ECU (multiplex network body ECU) connectors.

(b) Measure the voltage and resistance according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
4D-3 - Body ground	LA - Body ground	Ground	Always	Below 1 Ω
4F-1 - Body ground	LG - Body ground	Auxiliary battery power supply	Power switch off	11 to 14 V
4K-1 - Body ground	W - Body ground	Auxiliary battery power supply	Power switch off	11 to 14 V

(d) Measure the voltage and resistance, and check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
4F-19 - Body ground	BE - Body ground	BKUP LP relay drive output	Power switch off, reverse (R) not selected	Below 1 V
4F-19 - Body ground	BE - Body ground	BKUP LP relay drive output	Power switch on (IG), reverse (R) selected	11 to 14 V
4F-31 - Body ground	V - Body ground	H-LP LH relay drive output	Power switch on (IG) or within 15 seconds after power switch turned off Taillights on	Below 1 V
4F-31 - Body ground	V - Body ground	H-LP LH relay drive output	15 seconds or more after power switch turned off Taillights off	11 to 14 V
4H-10 - Body ground	LG - Body ground	Back-up lights drive output	Power switch off, reverse (R) not selected	Below 1 V
4H-10 - Body ground	LG - Body ground	Back-up lights drive output	Power switch on (IG), reverse (R) selected	11 to 14 V
4H-30 - Body ground	LA-B - Body ground	Taillights, rear side marker lights and license plate lights drive output	Taillights on	11 to 14 V
4H-30 - Body ground	LA-B - Body ground		Taillights off	Below 1 V
G32-19 (GND2) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
G32-23 (AHID) - Body ground	BE - Body ground	Auto high beam switch indicator drive output	Power switch on (IG), auto high beam switch on	Below 1 V
G32-23 (AHID) - Body ground	BE - Body ground	Auto high beam switch indicator drive output	Power switch on (IG), auto high beam switch off	11 to 14 V
G33-12 (HRY2) - Body ground	BE - Body ground	H-LP RH relay drive output	Power switch on (IG) or within 15 seconds after power switch turned off Taillights on	Below 1 V
G33-12 (HRY2) - Body ground	BE - Body ground	H-LP RH relay drive output	15 seconds or more after power switch turned off Taillights off	11 to 14 V
G33-16 (HEAD) - Body ground	LG - Body ground	Light control switch head position input	Light control switch in head position	Below 1 V
G33-16 (HEAD) - Body ground	LG - Body ground	Light control switch head position input	Light control switch not in head position	11 to 14 V
G33-23 (CLTB) - G33-25 (CLTE)	BE - GR	Automatic light control sensor power supply output	Power switch off	Below 1 V
G33-23 (CLTB) - G33-25 (CLTE)	BE - GR	Automatic light control sensor power supply output	Power switch on (IG)	11 to 14 V
G33-24 (CLTS) - Body ground	R - Body ground	Automatic light control sensor signal input	Power switch off	Below 1 V
G33-24 (CLTS) - Body ground	R - Body ground	Automatic light control sensor signal input	Power switch on (IG)	Pulse generation (See waveform 1)
G33-26 (AHBI) - Body ground	B - Body ground	Auto high beam switch signal input	Auto high beam switch on	Below 1 V
G33-26 (AHBI) - Body ground	B - Body ground	Auto high beam switch signal input	Auto high beam switch off	11 to 14 V

(1) Waveform 1

Item	Content
Tester Connection	G33-24 (CLTS) - Body ground
Tool setting	2 V/DIV., 10 ms./DIV.
Condition	Power switch on (IG)

HINT:

The communication waveform changes according to the surrounding brightness.

CHECK HEADLIGHT ECU SUB-ASSEMBLY LH

(a) Disconnect the A8 headlight ECU sub-assembly LH connector.

(b) Measure the voltage and resistance on the wire harness side connector according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
A8-4 (IG) - Body ground	B - Body ground	Ignition power supply	Power switch off	Below 1 V
A8-4 (IG) - Body ground	B - Body ground	Ignition power supply	Power switch on (IG)	11 to 14 V
A8-12 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
A8-13 (ECUB) - Body ground	B - Body ground	Auxiliary battery power supply	15 seconds or more after power switch turned off Taillights off	Below 1 V
A8-13 (ECUB) - Body ground	B - Body ground	Auxiliary battery power supply	Power switch on (IG) or within 15 seconds after power switch turned off Taillights on	9.5 to 14 V

HINT:

Since the A8 headlight ECU sub-assembly LH connector is a waterproof type connector, the voltage and pulses cannot be checked directly. The values listed are for reference only.
Since the B and C headlight ECU sub-assembly LH connectors are connected inside the headlight assembly, the voltage and pulses cannot be checked directly. The values listed are for reference only.

(d) Measure the voltage and check of pulses according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
A8-11 (TNS) - Body ground	LA-LG - Body ground	Front turn signal light signal input	Power switch on (IG), front turn signal light off	Below 1 V
A8-11 (TNS) - Body ground	LA-LG - Body ground	Front turn signal light signal input	Power switch on (IG), front turn signal light blinking	11 to 14 V ←→ Below 1 V
A8-23 (CANL) - Body ground	W - Body ground	CAN communication line	Power switch off	Below 1 V
A8-23 (CANL) - Body ground	W - Body ground	CAN communication line	Power switch on (IG)	Pulse generation
A8-24 (CANH) - Body ground	P - Body ground	CAN communication line	Power switch off	Below 1 V
A8-24 (CANH) - Body ground	P - Body ground	CAN communication line	Power switch on (IG)	Pulse generation
B-2 (LOLED2) - B-3 (LOLED1)	-	Low beam headlights drive output	Low beam headlights off	Below 1 V
B-2 (LOLED2) - B-3 (LOLED1)	-	Low beam headlights drive output	Low beam headlights on	19.2 to 27.9 V
B-6 (HILED2) - B-5 (HILED1)	-	Low beam headlights drive output	Low beam headlights off	Below 1 V
B-6 (HILED2) - B-5 (HILED1)	-	Low beam headlights drive output	Low beam headlights on	15.5 to 24.0 V
B-4 (FANB) - B-14 (FANG)	-	Headlight fan power source	Low beam headlights off	Below 1 V
B-4 (FANB) - B-14 (FANG)	-	Headlight fan power source	Low beam headlights on	4.75 to 5.25 V
B-10 (DRL/CLL+) - B-1 (DRL/CLL-)	-	Parking lights/daytime running lights power source	Parking lights and daytime running lights off	Below 1 V
B-10 (DRL/CLL+) - B-1 (DRL/CLL-)	-	Parking lights/daytime running lights power source	Parking lights and daytime running lights on	11 to 14 V
B-15 (FANP) - B-14 (FANG)	-	Headlight fan control signal input	Low beam headlights off	Below 1 V
B-15 (FANP) - B-14 (FANG)	-	Headlight fan control signal input	Low beam headlights on	Pulse generation
B-16 (PWM1) - B-1 (DRL/CLL-)	-	Parking lights/daytime running lights control signal output	Parking lights and daytime running lights off	Below 1 V
B-16 (PWM1) - B-1 (DRL/CLL-)	-	Parking lights/daytime running lights control signal output	Parking lights and daytime running lights on	Pulse generation
B-18 (FSML+) - B-12 (FSML-)	-	Front side marker light drive output	Front side marker light off	Below 1 V
B-18 (FSML+) - B-12 (FSML-)	-	Front side marker light drive output	Front side marker light on	11 to 14 V
B-19 (HI_SOL+) - B-11 (HI_SOL-)	-	Cornering light power source	Cornering light off	Below 1 V
B-19 (HI_SOL+) - B-11 (HI_SOL-)	-	Cornering light power source	Cornering light on	11 to 14 V
B-20 (TURN+) - B-13 (TURN-)	-	Front turn signal light signal output	Power switch on (IG), front turn signal light off	Below 1 V
B-20 (TURN+) - B-13 (TURN-)	-	Front turn signal light signal output	Power switch on (IG), front turn signal light blinking	11 to 14 V ←→ Below 1 V
C-6 (ADD+) - C-1 (ADD-)	-	High beam headlights drive output	High beam headlights off	Below 1 V
C-6 (ADD+) - C-1 (ADD-)	-	High beam headlights drive output	High beam headlights on	11 to 14 V
C-12 (PWM2) - B-11 (HI_SOL-)	-	Cornering light control signal output	Cornering light off	Below 1 V
C-12 (PWM2) - B-11 (HI_SOL-)	-	Cornering light control signal output	Cornering light on	Pulse generation

CHECK HEADLIGHT ECU SUB-ASSEMBLY RH

(a) Disconnect the A9 headlight ECU sub-assembly RH connector.

(b) Measure the voltage and resistance on the wire harness side connector according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
A9-4 (IG) - Body ground	B - Body ground	Ignition power supply	Power switch off	Below 1 V
A9-4 (IG) - Body ground	B - Body ground	Ignition power supply	Power switch on (IG)	11 to 14 V
A9-12 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
A9-13 (ECUB) - Body ground	R - Body ground	Auxiliary battery power supply	15 seconds or more after power switch turned off Taillights off	Below 1 V
A9-13 (ECUB) - Body ground	R - Body ground	Auxiliary battery power supply	Power switch on (IG) or within 15 seconds after power switch turned off Taillights on	9.5 to 14 V

HINT:

Since the A9 headlight ECU sub-assembly RH connector is a waterproof type connector, the voltage and pulses cannot be checked directly. The values listed are for reference only.
Since the B and C headlight ECU sub-assembly RH connectors are connected inside the headlight assembly, the voltage and pulses cannot be checked directly. The values listed are for reference only.

(d) Measure the voltage and check of pulses according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
A9-11 (TNS) - Body ground	LA-G - Body ground	Front turn signal light signal input	Power switch on (IG), front turn signal light off	Below 1 V
A9-11 (TNS) - Body ground	LA-G - Body ground	Front turn signal light signal input	Power switch on (IG), front turn signal light blinking	11 to 14 V ←→ Below 1 V
A9-23 (CANL) - Body ground	W - Body ground	CAN communication line	Power switch off	Below 1 V
A9-23 (CANL) - Body ground	W - Body ground	CAN communication line	Power switch on (IG)	Pulse generation
A9-24 (CANH) - Body ground	L - Body ground	CAN communication line	Power switch off	Below 1 V
A9-24 (CANH) - Body ground	L - Body ground	CAN communication line	Power switch on (IG)	Pulse generation
B-2 (LOLED2) - B-3 (LOLED1)	-	Low beam headlights drive output	Low beam headlights off	Below 1 V
B-2 (LOLED2) - B-3 (LOLED1)	-	Low beam headlights drive output	Low beam headlights on	19.2 to 27.9 V
B-6 (HILED2) - B-5 (HILED1)	-	Low beam headlights drive output	Low beam headlights off	Below 1 V
B-6 (HILED2) - B-5 (HILED1)	-	Low beam headlights drive output	Low beam headlights on	15.5 to 24.0 V
B-4 (FANB) - B-14 (FANG)	-	Headlight fan power source	Low beam headlights off	Below 1 V
B-4 (FANB) - B-14 (FANG)	-	Headlight fan power source	Low beam headlights on	4.75 to 5.25 V
B-10 (DRL/CLL+) - B-1 (DRL/CLL-)	-	Parking lights/daytime running lights power source	Parking lights and daytime running lights off	Below 1 V
B-10 (DRL/CLL+) - B-1 (DRL/CLL-)	-	Parking lights/daytime running lights power source	Parking lights and daytime running lights on	11 to 14 V
B-15 (FANP) - B-14 (FANG)	-	Headlight fan control signal input	Low beam headlights off	Below 1 V
B-15 (FANP) - B-14 (FANG)	-	Headlight fan control signal input	Low beam headlights on	Pulse generation
B-16 (PWM1) - B-1 (DRL/CLL-)	-	Parking lights/daytime running lights control signal output	Parking lights and daytime running lights off	Below 1 V
B-16 (PWM1) - B-1 (DRL/CLL-)	-	Parking lights/daytime running lights control signal output	Parking lights and daytime running lights on	Pulse generation
B-18 (FSML+) - B-12 (FSML-)	-	Front side marker light drive output	Front side marker light off	Below 1 V
B-18 (FSML+) - B-12 (FSML-)	-	Front side marker light drive output	Front side marker light on	11 to 14 V
B-19 (HI_SOL+) - B-11 (HI_SOL-)	-	Cornering light power source	Cornering light off	Below 1 V
B-19 (HI_SOL+) - B-11 (HI_SOL-)	-	Cornering light power source	Cornering light on	11 to 14 V
B-20 (TURN+) - B-13 (TURN-)	-	Front turn signal light signal output	Power switch on (IG), front turn signal light off	Below 1 V
B-20 (TURN+) - B-13 (TURN-)	-	Front turn signal light signal output	Power switch on (IG), front turn signal light blinking	11 to 14 V ←→ Below 1 V
C-6 (ADD+) - C-1 (ADD-)	-	High beam headlights drive output	High beam headlights off	Below 1 V
C-6 (ADD+) - C-1 (ADD-)	-	High beam headlights drive output	High beam headlights on	11 to 14 V
C-12 (PWM2) - B-11 (HI_SOL-)	-	Cornering light control signal output	Cornering light off	Below 1 V
C-12 (PWM2) - B-11 (HI_SOL-)	-	Cornering light control signal output	Cornering light on	Pulse generation

CHECK COMBINATION METER ASSEMBLY

Click here

CHECK FORWARD RECOGNITION CAMERA

Click here

CHECK STEERING SENSOR

Click here

CHECK HYBRID VEHICLE CONTROL ECU

Click here

Turn Signal Switch Circuit

DESCRIPTION

The steering sensor receives the turn signal switch information and controls the turn signal lights.

WIRING DIAGRAM

PROCEDURE

1.	READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Chassis / Steering Angle Sensor / Data List.

(e) Read the Data List according to the display on the Techstream.

Chassis > Steering Angle Sensor > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Turn Signal Switch (Right)

Turn signal switch (right turn position) signal

OFF or ON

OFF: Turn signal switch not in right turn position

ON: Turn signal switch in right turn position

Turn Signal Switch (Left)

Turn signal switch (left turn position) signal

OFF or ON

OFF: Turn signal switch not in left turn position

ON: Turn signal switch in left turn position

Cornering Light/Front Side Illuminate Light Switch

Turn signal switch (full turn) signal

OFF or ON

OFF: Turn signal switch not in left or right turn position

ON: Turn signal switch in left or right full turn position

Chassis > Steering Angle Sensor > Data List

Tester Display
Turn Signal Switch (Right)
Turn Signal Switch (Left)
Cornering Light/Front Side Illuminate Light Switch

OK:

Normal conditions listed above are displayed.

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

2.	INSPECT TURN SIGNAL SWITCH

(a) Remove the turn signal switch.

Click here

(b) Inspect the turn signal switch.

Click here

REPLACE TURN SIGNAL SWITCH

3.	INSPECT STEERING WHEEL SWITCH HOUSING

(a) Remove the steering wheel switch housing.

Click here

(b) Inspect the steering wheel switch housing.

Click here

REPLACE STEERING SENSOR

REPLACE STEERING WHEEL SWITCH HOUSING

Control Module Communication Bus Off (U0073,U0101,U0126,U0129,U0142,U0155,U0242,U0293)

DESCRIPTION

These DTCs are stored if a CAN communication malfunction occurs between the headlight ECU sub-assembly LH and other ECUs.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	DTC Output from
U0073	Control Module Communication Bus Off	The headlight ECU sub-assembly LH does not send/receive data.	CAN communication system	Headlight ECU sub-assembly LH
U0101	Lost Communication with TCM	The headlight ECU sub-assembly LH does not receive data from the hybrid vehicle control ECU for approximately 10 seconds or more.	CAN communication system Hybrid vehicle control ECU	Headlight ECU sub-assembly LH
U0126	Lost Communication with Steering Angle Sensor Module	The headlight ECU sub-assembly LH does not receive data from the steering sensor for approximately 10 seconds or more.	CAN communication system Steering sensor	Headlight ECU sub-assembly LH
U0129	Lost Communication with Brake System Control Module	The headlight ECU sub-assembly LH does not receive data from the skid control ECU (brake booster with master cylinder assembly) for approximately 10 seconds or more.	CAN communication system Skid control ECU (brake booster with master cylinder assembly)	Headlight ECU sub-assembly LH
U0142	Lost Communication with Body Control Module "B"	The headlight ECU sub-assembly LH does not receive data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more.	CAN communication system Main body ECU (multiplex network body ECU)	Headlight ECU sub-assembly LH
U0155	Lost Communication with Instrument Panel Cluster (IPC) Control Module	The headlight ECU sub-assembly LH does not receive data from the combination meter assembly for approximately 30 seconds or more.	CAN communication system Combination meter assembly	Headlight ECU sub-assembly LH
U0242	Lost Communication With Headlamp Control Module "B"	The headlight ECU sub-assembly LH does not receive data from the headlight ECU sub-assembly RH for approximately 10 seconds or more.	CAN communication system Headlight ECU sub-assembly RH	Headlight ECU sub-assembly LH
U0293	Lost Communication with Hybrid Vehicle Control System	The headlight ECU sub-assembly LH does not receive data from the hybrid vehicle control ECU for approximately 10 seconds or more.	CAN communication system Hybrid vehicle control ECU	Headlight ECU sub-assembly LH

PROCEDURE

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / HL AutoLeveling / Trouble Codes.

(e) Clear the DTCs.

Body Electrical > HL AutoLeveling > Clear DTCs

2.	CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / HL AutoLeveling / Trouble Codes.

(f) Check for DTCs.

Body Electrical > HL AutoLeveling > Trouble Codes

OK:

DTCs are not output.

USE SIMULATION METHOD TO CHECK

GO TO CAN COMMUNICATION SYSTEM

Control Module Communication Bus OFF (U0073,U0126,U0142,U0155,U0182)

DESCRIPTION

These DTCs are stored if a CAN communication malfunction occurs between the headlight ECU sub-assembly RH and other ECUs.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	DTC Output from
U0073	Control Module Communication Bus OFF	The headlight ECU sub-assembly RH does not send/receive data.	CAN communication system	Headlight ECU sub-assembly RH
U0126	Lost Communication with Steering Angle Sensor Module	The headlight ECU sub-assembly RH does not receive data from the steering sensor for approximately 10 seconds or more.	CAN communication system Steering sensor	Headlight ECU sub-assembly RH
U0142	Lost Communication with Body Control Module "B"	The headlight ECU sub-assembly RH does not receive data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more.	CAN communication system Main body ECU (multiplex network body ECU)	Headlight ECU sub-assembly RH
U0155	Lost Communication with Instrument Panel Cluster (IPC) Control Module	The headlight ECU sub-assembly RH does not receive data from the combination meter assembly for approximately 30 seconds or more.	CAN communication system Combination meter assembly	Headlight ECU sub-assembly RH
U0182	Lost Communication With Lighting Control Module Front	The headlight ECU sub-assembly RH does not receive data from the headlight ECU sub-assembly LH for approximately 10 seconds or more.	CAN communication system Headlight ECU sub-assembly LH	Headlight ECU sub-assembly RH

PROCEDURE

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / HL AutoLeveling (Sub) / Trouble Codes.

(e) Clear the DTCs.

Body Electrical > HL AutoLeveling (Sub) > Clear DTCs

2.	CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / HL AutoLeveling (Sub) / Trouble Codes.

(f) Check for DTCs.

Body Electrical > HL AutoLeveling (Sub) > Trouble Codes

OK:

DTCs are not output.

USE SIMULATION METHOD TO CHECK

GO TO CAN COMMUNICATION SYSTEM

Lost Communication With ECM/PCM "A" (U0100,...,U1117)

DESCRIPTION

These DTCs are stored if a CAN communication malfunction occurs between the main body ECU (multiplex network body ECU) and other ECUs.

PROCEDURE

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / Main Body / Trouble Codes.

(e) Clear the DTCs.

Body Electrical > Main Body > Clear DTCs

2.	CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / Main Body / Trouble Codes.

(f) Check for DTCs.

Body Electrical > Main Body > Trouble Codes

OK:

DTCs are not output.

USE SIMULATION METHOD TO CHECK

GO TO CAN COMMUNICATION SYSTEM

CAN Communication Failure (Message Registry) (U1000)

DESCRIPTION

The headlight ECU sub-assembly LH or headlight ECU sub-assembly RH stores this DTC if it detects an internal malfunction related to the CAN communication system.

HL AutoLeveling

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

U1000

CAN Communication Failure (Message Registry)

The power switch is on (IG).

CAN communication failure

Headlight ECU sub-assembly LH

HL AutoLeveling (Sub)

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

U1000

CAN Communication Failure (Message Registry)

The power switch is on (IG).

CAN communication failure

Headlight ECU sub-assembly RH

CAUTION / NOTICE / HINT

NOTICE:

If the headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information the headlight ECU sub-assembly LH.

Click here

PROCEDURE

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.

(e) Clear the DTCs.

Body Electrical > HL AutoLeveling > Clear DTCs Body Electrical > HL AutoLeveling (Sub) > Clear DTCs

2.	CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.

(e) Check for DTCs.

Body Electrical > HL AutoLeveling > Trouble Codes Body Electrical > HL AutoLeveling (Sub) > Trouble Codes

OK:

DTC U1000 is not output.

Result	Proceed to
OK	A
NG (DTC output from headlight ECU sub-assembly LH)	B
NG (DTC output from headlight ECU sub-assembly RH)	C

USE SIMULATION METHOD TO CHECK

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH

REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH

Lighting System(for Gasoline Model Without Cornering Light)

Lighting System(for Hv Model Without Cornering Light)

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