Toyota Camry (XV70): ECU Malfunction (B1003)

Toyota Camry Repair Manual XV70 (2018-2024) / Power Source, Network / Networking / Can Communication System / ECU Malfunction (B1003)

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 ignition switch to 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

USE SIMULATION METHOD TO CHECK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

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Data List / Active Test

DATA LIST / ACTIVE TEST 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 part

Installation

INSTALLATION PROCEDURE 1. INSTALL STARTER ASSEMBLY (a) Install the starter assembly with the 2 bolts. Torque: 46 N·m {469 kgf·cm, 34 ft·lbf} (b) Connect the engine wire to the terminal 30 with the nut. Torque: 9.8 N·m {100 kgf·cm, 87 in·lbf} (c) Close the terminal cap. (d) Connect the

Toyota Camry (XV70): ECU Malfunction (B1003)

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