PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:U0122, U0123, U0126, U0140, U0151, U1100

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
U0151 Lost Communication with Airbag ECU
U1100 Lost Communication with Seat Belt Control 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-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.

  • Master cylinder solenoid (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 (Multiplex network body ECU)

  • CAN communication system

  • Seat belt control ECU
U0151 While the ignition switch is ON, communication stops between the center airbag sensor assembly and seat belt control ECU for 1 second or more.

  • Center airbag sensor assembly

  • CAN communication system

  • Seat belt control 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

INSPECTION PROCEDURE

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 (for LHD with Entry and Start System) B
      CAN DTC is output (for LHD without Entry and Start System) C
      CAN DTC is output (for RHD with Entry and Start System) D
      CAN DTC is output (for RHD without Entry and Start System) E

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    C

    GO TO CAN COMMUNICATION SYSTEM Click here

    D

    GO TO CAN COMMUNICATION SYSTEM Click here

    E

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

    USE SIMULATION METHOD TO CHECK Click here