PRE-CRASH SAFETY SYSTEM, Diagnostic DTC:U0100, U0125, U0126, U0129, U0140, U0142, U0151, U0235, U1002, U1100, U1104, U1119, U1121

DTC Code DTC Name
U0100 Lost Communication with ECM / PCM "A"
U0125 Lost Communication with Yaw Rate Sensor Module
U0126 Lost Communication with Steering Angle Sensor Module
U0129 Lost Communication with Brake System Control Module
U0140 Lost Communication With J/B ECU
U0142 Lost Communication with Body Control Module "B"
U0151 Lost Communication with Airbag ECU
U0235 Lost Communication with Cruise Control Front Distance Range Sensor
U1002 Lost Communication with Gateway Module
U1100 Lost Communication with Seat Belt Control ECU
U1104 Lost Communication with Driving Support ECU
U1119 Lost Communication with Object Recognition ECU (CAN)
U1121 Lost Communication with Driver Monitor ECU

DESCRIPTION

The driving support ECU uses the millimeter wave radar sensor, driver monitor camera and lane recognition camera 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-crash safety 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-crash safety control.

DTC Code DTC Detection Condition Trouble Area
U0100 The driving support ECU is unable to receive certain data from the ECM for 5 seconds or more.

  • CAN communication system

  • ECM

  • Driving support ECU
U0125 The driving support ECU assembly is unable to receive certain data from the yaw rate sensor for 4 seconds or more.

  • CAN communication system

  • Yaw rate sensor

  • Driving support ECU
U0126 The driving support ECU assembly is unable to receive certain data from the spiral with sensor cable sub-assembly (steering angle sensor) for 5 seconds or more.

  • CAN communication system

  • Spiral cable sub-assembly

  • Driving support ECU
U0129

  • The driving support ECU assembly is unable to receive certain data from the brake actuator assembly (skid control ECU) for 5 seconds or more.

  • The seat belt control ECU does not receive information from the brake actuator assembly for 2.58 seconds or more.

  • CAN communication system

  • Brake actuator assembly (skid control ECU)

  • Seat belt control ECU

  • Driving support ECU
U0140

  • Both conditions are met:


  • The vehicle type information is undetermined.

  • The driving support ECU is unable to receive certain data from the main body ECU (multiplex network body ECU) for 5.6 seconds or more.

  • CAN communication system

  • Main body ECU (multiplex network body ECU)

  • Seat belt control ECU
U0142 The driving support ECU assembly is unable to receive certain data from the main body ECU (multiplex network body ECU) for 14.2 seconds or more.

  • CAN communication system

  • Main body ECU (multiplex network body ECU)

  • Driving support ECU
U0151 The seat belt control ECU is unable to receive certain data from the center airbag sensor assembly for 5.6 seconds or more.

  • CAN communication system

  • Seat belt control ECU

  • Center airbag sensor assembly
U0235 The data sent to the driving support ECU assembly from the millimeter wave radar sensor assembly is abnormal for 2 seconds or more.

  • CAN communication system

  • Millimeter wave radar sensor assembly

  • Driving support ECU
U1002 The driving support ECU assembly detects a problem when communicating with the millimeter wave radar sensor assembly, lane recognition camera sensor assembly, driver monitor ECU assembly and No. 1 night view ECU.

  • CAN communication system

  • Millimeter wave radar sensor assembly

  • Lane recognition camera sensor assembly

  • Driving support ECU
U1100 The driving support ECU assembly is unable to receive certain data from the seat belt control ECU for 4 seconds or more.

  • CAN communication system

  • Seat belt control ECU

  • Driving support ECU
U1104 The driving support ECU assembly data sent to the millimeter wave radar sensor assembly, driver monitor ECU assembly, or seat belt control ECU is lost for 1 second or more.

  • CAN communication system

  • Lane recognition camera sensor assembly

  • Seat belt control ECU

  • Driving support ECU
U1119 The driving support ECU assembly is unable to receive certain data from the lane recognition camera sensor assembly for 2 seconds or more.

  • CAN communication system

  • Lane recognition camera sensor assembly

  • Driving support ECU
U1121* The driving support ECU assembly is unable to receive certain data from the driver monitor ECU assembly for 2 seconds or more.

  • CAN communication system

  • Driver monitor ECU

  • Driving support ECU

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK FOR DTC (CAN COMMUNICATION SYSTEM)


    1. Select "Bus Check" from the "System Select".

      for LHD: Click here

      for RHD: Click here

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

      Result
      Result Proceed to
      CAN communication system DTC is not output A
      CAN communication system DTC is output (for LHD) B
      CAN communication system DTC is output (for RHD) C

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    C

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

    USE SIMULATION METHOD TO CHECK Click here