Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001AYB0
Model Year Start: 2019 Model: Avalon Prod Date Range: [04/2018 -           ]
Title: LIGHTING (EXT): LIGHTING SYSTEM (for Gasoline Model with Cornering Light): B242C,B242D; Right Headlight ECU Malfunction; 2019 - 2022 MY Avalon [04/2018 -        ]

DTC

B242C

Right Headlight ECU Malfunction

DTC

B242D

Left Headlight ECU Malfunction

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

Detection condition:

  • The engine switch is on (IG).

Malfunction status:

  • Headlight ECU sub-assembly RH internal malfunction

Malfunction duration:

  • Maximum 15 minutes

Headlight ECU sub-assembly RH

Headlight ECU sub-assembly RH

B242D

Left Headlight ECU Malfunction

Detection condition:

  • The engine switch is on (IG).

Malfunction status:

  • Headlight ECU sub-assembly LH internal malfunction

Malfunction duration:

  • Maximum 15 minutes

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 2019 - 2022 MY Avalon [04/2018 -        ]; LIGHTING (EXT): LIGHTING SYSTEM (for Gasoline Model with Cornering Light): INITIALIZATION

PROCEDURE

1.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(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

NEXT

2.

CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

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

(c) Wait for at least maximum 15 minutes.

(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
A

USE SIMULATION METHOD TO CHECK

B

REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH

C

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH