PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:U0122, U0123, U0126, U0140, U0235, U1002, U1100, U1104, U1119

DTC Code DTC Name
U0122 Lost Communication with Vehicle Dynamics Control Module
U0123 Lost Communication with Yaw Rate Sensor Module
U0126 Lost Communication with Steering Angle Sensor Module
U0140 Lost Communication with Main Body ECU
U0235 Lost Communication with Cruise Control Front Distance Range Sensor
U1002 Lost Communication with Gateway Module (Parking Assist Bus)
U1100 Lost Communication with Seat Belt Control ECU
U1104 Lost Communication with Driving Support ECU
U1119 Lost Communication with Object Recognition ECU (CAN)

DESCRIPTION

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

DTC Code DTC Detection Condition Trouble Area
U0122 While the ignition switch is ON, communication stops between the skid control ECU and driving support ECU or seat belt control ECU for 1 second or more.

  • Brake actuator assembly (Skid control ECU)

  • CAN communication system

  • Seat belt control ECU

  • Driving support ECU
U0123 While the ignition switch is ON, communication stops between the yaw rate sensor and driving support ECU for 1 second or more.

  • Yaw rate sensor

  • CAN communication system

  • Driving support ECU
U0126 While the ignition switch is ON, communication stops between the steering angle sensor and driving support ECU for 1 second or more.

  • Steering angle sensor

  • CAN communication system

  • Driving support ECU
U0140 While the ignition switch is ON, communication stops between the main body ECU and seat belt control ECU for 1 second or more.

  • Main body ECU (Instrument panel junction block assembly)

  • CAN communication system

  • Seat belt control ECU
U0235 While the ignition switch is ON, communication stops between the millimeter wave radar sensor and driving support ECU for 1 second or more.

  • Millimeter wave radar sensor assembly

  • CAN communication system

  • Driving support ECU
U1002 While the ignition switch is ON, communication stops between the parking assist bus and driving support ECU for 1 second or more.

  • Parking assist bus

  • CAN communication system

  • Driving support ECU
U1100 While the ignition switch is ON, communication stops between the seat belt control ECU and driving support ECU for 1 second or more.

  • Seat belt control ECU

  • CAN communication system

  • Driving support ECU
U1104 While the ignition switch is ON, communication stops between the driving support ECU and millimeter wave radar sensor, ECM, lane recognition camera sensor or seat belt control ECU for 1 second or more.

  • Driving support ECU

  • CAN communication system

  • Millimeter wave radar sensor assembly

  • ECM

  • Lane recognition camera sensor assembly

  • Seat belt control ECU
U1119 While the ignition switch is ON, communication stops between the lane recognition camera sensor and driving support ECU continues for 1 second or more.

  • Lane recognition camera sensor assembly

  • CAN communication system

  • Driving support ECU

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Select "Bus Check" from the "System Select" screen on the intelligent tester.

    2. Select "Communication Malfunction DTC" from the "Bus Check" screen, and then select "Enter".

      Result
      Result Proceed to
      CAN DTC is not output A
      CAN DTC is output B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    GO TO CAN COMMUNICATION SYSTEM Click here