Lighting (EXT)

LIGHTING (EXT): LIGHTING SYSTEM: U0073,U0100,U0126,U0129,U0142,U1000,U1121: Control Module Communication Bus Off
U1121 - Lost Communication with Driver Seat Module

DESCRIPTION

These DTCs are stored when the self-diagnosis of the headlight swivel ECU determines that the CAN communication system is malfunctioning.





INSPECTION PROCEDURE

PROCEDURE

1. CHECK FOR DTC

(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

(b) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

OK:

DTC output does not occur.

NG -- GO TO CAN COMMUNICATION SYSTEM Diagnosis System

OK -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting