Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001AYBA
Model Year Start: 2019 Model: Avalon Prod Date Range: [04/2018 -           ]
Title: LIGHTING (EXT): LIGHTING SYSTEM (for Gasoline Model with Cornering Light): U1000; CAN Communication Failure (Message Registry); 2019 - 2022 MY Avalon [04/2018 -        ]

DTC

U1000

CAN Communication Failure (Message Registry)

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)

Detection condition:

  • The engine switch is on (IG).

Malfunction status:

  • CAN communication failure

Malfunction duration:

  • -

Headlight ECU sub-assembly LH

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)

Detection condition:

  • The engine switch is on (IG).

Malfunction status:

  • CAN communication failure

Malfunction duration:

  • -

Headlight ECU sub-assembly RH

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 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) Turn the Techstream on.

(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
A

USE SIMULATION METHOD TO CHECK

B

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH

C

REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH