Pre-Collision System

PRE-COLLISION: PRE-COLLISION SYSTEM: U0122, U0123, U0126, U0140, U0151, U0235, U1002, U1100, U1104, U1121: Lost Communication with Vehicle Dynamics Control Module
U1121 - Lost Communication with Driver Monitor ECU

DESCRIPTION

These DTCs are stored when a communication malfunction occurs between the sensors and ECUs that detect collisions, or between ECUs that perform pre-collision control.





INSPECTION PROCEDURE

PROCEDURE

1. CHECK FOR DTC (CAN COMMUNICATION SYSTEM)

(a) Clear the DTCs Pre-Collision System.

(b) Check for DTCs Pre-Collision System.

OK:

CAN communication system DTCs are not output.

NG -- GO TO CAN COMMUNICATION SYSTEM Diagnosis System

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