Pre-Collision System

PRE-COLLISION: PRE-COLLISION SYSTEM: U0122: Lost Communication with Vehicle Dynamics Control Module

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 U0293 - Lost Communication with HV ECU

DTC U1104 - Lost Communication with Driving Support ECU

DTC U1121 - Lost Communication with Driver Monitor ECU

DESCRIPTION

The driving support ECU uses the front millimeter wave radar sensor, driver monitor camera and object recognition camera 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.






INSPECTION PROCEDURE

Refer to CAN communication system DTC U0122 [1][2]CAN Communication System.
Refer to CAN communication system DTC U0123 [1][2]CAN Communication System.
Refer to CAN communication system DTC U0126 [1][2]CAN Communication System.
Refer to CAN communication system DTC U0151 Problem Symptoms Table.
Refer to CAN communication system DTC U0235 CAN Communication System.
Refer to CAN communication system DTC U0293 CAN Communication System.
Refer to CAN communication system DTC U1104 CAN Communication System.
Refer to CAN communication system DTC U1121 CAN Communication System.

PROCEDURE

1. CHECK CAN COMMUNICATION SYSTEM
(a) for Intelligent tester
(1) Select "BUS CHECK" from the "OBD/MOBD MENU" Diagnosis System.
(2) Press "ENTER" on the intelligent tester Diagnosis System.
(b) for Techstream
(1) Select "Bus Check" from the "System Select" Diagnosis System.
(2) Select "Communication Malfunction DTC" from the "Bus Check" screen, and then select "Enter" Diagnosis System.

Result





B -- GO TO CAN COMMUNICATION SYSTEM
A -- USE SIMULATION METHOD TO CHECK