Pre-Collision System

DTC U0100 Lost Communication with ECM/PCM "A"
DTC U0122 Lost Communication with Vehicle Dynamics Control Module
DTC U0123 Lost Communication with Yaw Rate Sensor Module
DTC U0126 Lost Communication with Steering Angle Sensor Module
DTC U0140 Lost Communication with Main Body ECU
DTC U0151 Lost Communication with Airbag ECU
DTC U0235 Lost Communication with Cruise Control Front Distance Range Sensor
DTC U1104 Lost Communication with Driving Support ECU

DESCRIPTION

DTC Detection Condition (Part 1):

DTC Detection Condition (Part 2):

The driving support ECU uses the front millimeter wave radar sensor to detect obstacles in front of and behind the vehicle, and detect the direction that the driver's head is facing. Based on this information, the driving support ECU sends pre-collision control operation signals.

This DTC is output when a communication malfunction occurs between the sensors and ECUs that detect collisions, or between ECUs that perform the pre-collision control.

Step 1:

INSPECTION PROCEDURE
For the inspection procedure(s) of the specific U-code(s), please refer to the CAN Communication System; Diagnosis System at Information Bus; Testing and Inspection, for additional information. Initial Inspection and Diagnostic Overview