Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001ANA0
Model Year Start: 2019 Model: Avalon Prod Date Range: [04/2018 -           ]
Title: NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): B1003; ECU Malfunction; 2019 - 2022 MY Avalon [04/2018 -        ]

DTC

B1003

ECU Malfunction

DESCRIPTION

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Note

B1003

ECU Malfunction

A malfunction in the non-volatile storage of the central gateway ECU (network gateway ECU) is detected.

Central gateway ECU (network gateway ECU)

-

PROCEDURE

1.

RECONFIRM DTC OUTPUT

(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 / Central Gateway / Trouble Codes.

Body Electrical > Central Gateway > Trouble Codes

Result

Proceed to

DTC B1003 is not output from the central gateway ECU (network gateway ECU)

A

DTC B1003 is output from the central gateway ECU (network gateway ECU)

B
A

USE SIMULATION METHOD TO CHECK

B

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) 2019 - 2021 MY Avalon Avalon HV [04/2018 - 08/2021]; NETWORKING: NETWORK GATEWAY ECU: REMOVAL 2022 MY Avalon Avalon HV [08/2021 -        ]; NETWORKING: NETWORK GATEWAY ECU: REMOVAL