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 U1100: Lost Communication with Seat Belt Control ECU [12/2015 - 11/2017]: Description

The driving support ECU uses the millimeter wave radar sensor to detect obstacles in front of the vehicle. Based on this information, the driving support ECU sends pre-collision control operation signals. These DTCs are stored when a communication malfunction occurs between the sensors and ECUs that detect collisions, or between ECUs that perform the pre-collision control.

DTC No.	DTC Detection Condition	Trouble Area
U0122	When the ignition switch is ON, a communication error between the skid control ECU and the driving support ECU is detected for approximately. 5 seconds. When the ignition switch is ON, a communication error between the skid control ECU assembly and the seat belt control ECU is detected for approximately. 3 seconds.	Brake actuator (skid control ECU) CAN communication system Seat belt control ECU Driving support ECU
U0123	When the ignition switch is ON, a communication error between the yaw rate sensor and the driving support ECU is detected for approximately. 1 second.	Yaw rate sensor CAN communication system Driving support ECU
U0126	When the ignition switch is ON, a communication error between the steering sensor and the driving support ECU is detected for approximately. 1 second.	Steering angle sensor CAN communication system Driving support ECU
U0140	While ignition switch is ON, communication stop between main body ECU and seat belt control ECU continues for 6 seconds or more.	Main body ECU CAN communication system Seat belt control ECU
U0151	While ignition switch is ON, communication stop between center airbag sensor and seat belt control ECU continues for 6 seconds or more.	Center airbag sensor assembly CAN communication system Seat belt control ECU
U1100	When the ignition switch is ON, a communication error between the seat belt control ECU and the driving support ECU is detected for approximately. 9 seconds.	Seat belt control ECU CAN communication system Driving support ECU