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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System Diagram

SYSTEM DIAGRAM Luggage Compartment Door Opener System Communication Table Sender Receiver Signal Line Certification ECU (Smart Key ECU Assembly)* Main Body ECU (Multiplex Network Body ECU) Luggage compartment door lock assembly open operation signal

Inspection

INSPECTION PROCEDURE 1. INSPECT KNOCK CONTROL SENSOR (a) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection Condition Specified Condition 1 - 2 25°C (77°F) 120 to 280 kΩ If the result is not

Toyota Camry (XV70): ECU Malfunction (B1003)

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System Diagram

Inspection