Toyota Avalon (XX50): Vehicle Proximity Notification System

Speaker Circuit (B1350)

DESCRIPTION

The vehicle approaching speaker assembly circuit consists of the vehicle approaching speaker controller and vehicle approaching speaker assembly.

This DTC is stored when a malfunction is detected in the vehicle approaching speaker assembly circuit.

WIRING DIAGRAM

PROCEDURE

(a) Remove the vehicle approaching speaker assembly.

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(b) Inspect the vehicle approaching speaker assembly.

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NG

REPLACE VEHICLE APPROACHING SPEAKER ASSEMBLY

OK

(a) Disconnect the G38 vehicle approaching speaker controller connector.

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

Standard Resistance:

OK

REPLACE VEHICLE APPROACHING SPEAKER CONTROLLER

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

Customize Parameters

CUSTOMIZE PARAMETERS

CUSTOMIZE VEHICLE PROXIMITY NOTIFICATION SYSTEM

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) Turn the power switch off.

(2) Connect the Techstream to the DLC3.

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

(4) Turn the Techstream on.

(5) Enter the following menus: Customize Setting / Others.

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

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).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Vehicle Proximity Notification System / Data List.

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

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).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Vehicle Proximity Notification System / Active Test.

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

Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART

Dtc Check / Clear

DTC CHECK / CLEAR

DTC CHECK

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Vehicle Proximity Notification System / Trouble Codes.

(e) Check for DTCs.

DTC CLEAR

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Vehicle Proximity Notification System / Trouble Codes.

(e) Clear the DTCs.

How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

• Use the following procedure to troubleshoot the vehicle proximity notification system.
• *: Use the Techstream.

PROCEDURE

NEXT

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

NEXT

(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.

NEXT

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

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B

GO TO CAN COMMUNICATION SYSTEM

A

(a) Check if the lighting system is functioning normally.

for HV Model with Cornering Light: Click here

for HV Model without Cornering Light: Click here

B

GO TO LIGHTING SYSTEM

A

(a) Using the Techstream, check if the meter/gauge system is functioning normally.

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B

GO TO METER / GAUGE SYSTEM

A

(a) Check whether the hybrid control system is functioning normally.

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B

GO TO HYBRID CONTROL SYSTEM

A

(a) Check for DTCs.

B

GO TO DIAGNOSTIC TROUBLE CODE CHART

A

(a) Refer to Problem Symptoms Table.

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B

GO TO PROBLEM SYMPTOMS TABLE

A

(a) Operation Check.

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(b) Data List / Active Test

Click here

(c) Terminals of ECU

Click here

(d) Inspection

NEXT

NEXT

NEXT

END

Operation Check

OPERATION CHECK

VEHICLE PROXIMITY NOTIFICATION SYSTEM OPERATION CHECK

(a) System operation check (vehicle stopped)

(1) Apply the parking brake.

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

(3) With the brake pedal depressed, confirm that the vehicle proximity notification system does not operate (produce a sound) when the shift lever is moved from P to N.

(4) When the brake pedal is released, confirm that the vehicle proximity notification system operates for approximately 3 seconds (produces a sound).

(b) System operation check (vehicle being driven)

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

(2) Operate the EV drive mode switch and drive the vehicle using EV drive mode.

(3) When the shift lever is moved from P to D, confirm that the vehicle proximity notification system operates (produces a sound) when the vehicle is driven at speeds of 25 km/h (16 mph) or less using EV drive mode.

Parts Location

PARTS LOCATION

ILLUSTRATION

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.

PRECAUTIONS FOR VEHICLE PROXIMITY NOTIFICATION SYSTEM

(a) In the following cases, the volume or tone of the sound might change:

(1) If the vehicle is parked in a very hot or cold environment for an extended period of time (function will return to normal after time passes)

(2) If high pressure water is applied directly to the speaker from the bottom of the vehicle

(3) If the front of the speaker is blocked by mud, snow, ice, etc.

(4) If the entire speaker freezes

(b) In the following cases, it may be difficult to hear the sound from the speaker:

(1) If the environment around the vehicle is very noisy (in a busy intersection or when an emergency vehicle is approaching)

(2) If the listener is behind the vehicle. (Compared to a situation such as when a pedestrian is in front of the vehicle, the sound volume will seem to be lower when the car is reversing. This occurs because the speaker is installed facing the front of the vehicle.)

Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

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.
• Inspect the fuses and relays related to this system before inspecting the suspected areas below.

System Description

SYSTEM DESCRIPTION

VEHICLE PROXIMITY NOTIFICATION SYSTEM

(a) When the vehicle is being driven quietly using the motor only, the vehicle proximity notification system outputs a warning sound from the vehicle approaching speaker assembly to inform pedestrians, cyclists etc., of the approach of the vehicle.

(b) The warning sound is output by the vehicle approaching speaker assembly at a volume level that will not be perceived as noise. Also the pitch of the sound changes in accordance with vehicle speed so that the sound reflects vehicle deceleration and acceleration.

(c) Vehicle proximity notification system operation automatically stops when the vehicle is stopped, the engine starts or the vehicle is driven at 25 km/h (16 mph) or more.

System Diagram

SYSTEM DIAGRAM

Terminals Of Ecu

TERMINALS OF ECU

CHECK VEHICLE APPROACHING SPEAKER CONTROLLER

(a) Disconnect the G38 vehicle approaching speaker controller connector.

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

(c) Connect the G38 vehicle approaching speaker controller connector.

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

(1) Waveform 1

(2) Waveform 2

HINT:

When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows.

(3) Waveform 3

CHECK HYBRID VEHICLE CONTROL ECU

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