Toyota Avalon (XX50): Headlight Ecu

Components

COMPONENTS

ILLUSTRATION

*1

HEADLIGHT ECU SUB-ASSEMBLY

*2

HEADLIGHT GASKET

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Non-reusable part

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Installation

INSTALLATION

CAUTION / NOTICE / HINT

HINT:

  • Use the same procedure for the RH side and LH side.
  • The following procedure is for the LH side.

PROCEDURE

1. INSTALL HEADLIGHT GASKET

(a) Install a new headlight gasket.

2. INSTALL HEADLIGHT ECU SUB-ASSEMBLY

NOTICE:

If the headlight ECU sub-assembly has been struck or dropped, replace it with a new one.

(a) Connect the 2 connectors.

(b) Install the connector cover to the headlight ECU sub-assembly.

(c) Install the headlight ECU sub-assembly with the 3 screws.

3. INSTALL HEADLIGHT ASSEMBLY

Click here

Removal

REMOVAL

CAUTION / NOTICE / HINT

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 removal/installation are shown below.

Necessary Procedure After Parts Removed/Installed/Replaced (for Gasoline Model)

Replaced Part or Performed Procedure

Necessary Procedure

Effect/Inoperative Function When Necessary Procedures are not Performed

Link

Front bumper assembly

  • Measurement of ultrasonic sensor detection angle
  • Ultrasonic sensor detection angle registration
  • Intelligent Clearance Sonar System
  • Intuitive Parking Assist System

Front television camera view adjustment

Panoramic View Monitor System

  • Headlight assembly LH
  • Headlight ECU sub-assembly LH

Synchronize the vehicle information

Lighting system (for Gasoline Model with Cornering Light)

Necessary Procedure After Parts Removed/Installed/Replaced (for HV Model)

Replaced Part or Performed Procedure

Necessary Procedure

Effect/Inoperative Function When Necessary Procedures are not Performed

Link

Front bumper assembly

  • Measurement of ultrasonic sensor detection angle
  • Ultrasonic sensor detection angle registration
  • Intelligent Clearance Sonar System
  • Intuitive Parking Assist System

Front television camera view adjustment

Panoramic View Monitor System

  • Headlight assembly LH
  • Headlight ECU sub-assembly LH

Synchronize the vehicle information

Lighting system (for HV Model with Cornering Light)

HINT:

  • Use the same procedure for the RH side and LH side.
  • The following procedure is for the LH side.

PROCEDURE

1. REMOVE HEADLIGHT ASSEMBLY

Click here

2. REMOVE HEADLIGHT ECU SUB-ASSEMBLY

NOTICE:

  • Make sure to replace the headlight gasket with a new one. Failure to do so may cause water ingress.
  • If the headlight ECU sub-assembly has been struck or dropped, replace it with a new one.

(a) Using a T25 "TORX" socket wrench, remove the 3 screws.

(b) Separate the connector cover from the headlight ECU sub-assembly.

(c) Disconnect the 2 connectors to remove the headlight ECU sub-assembly.

3. REMOVE HEADLIGHT GASKET

NOTICE:

Make sure to replace the headlight gasket with a new one. Failure to do so may cause water ingress.

(a) Remove the headlight gasket.

Headlight Dimmer Switch

High Mounted Stop Light Assembly

See More:

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Sfi System: Barometric Pressure Sensor "A" Circuit Short to Ground (P222611,P222615). A/F (O2) Sensor Signal Biased/Stuck Lean Bank 1 Sensor 2 Circuit Current Above Threshold (P227019,P227118). ECM/PCM Engine Off
Barometric Pressure Sensor "A" Circuit Short to Ground (P222611,P222615) DESCRIPTION The atmospheric pressure sensor is built into the ECM. The ECM provides optimal control in response to atmospheric pressure fluctuations. DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note P ...

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual

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