ROAD SIGN ASSIST SYSTEM, Diagnostic DTC:U0100, U0101, U0123, U0129, U0142, U0155

DTC Code DTC Name
U0100 Lost Communication With ECM/PCM "A"
U0101 Lost Communication With TCM
U0123 Lost Communication with Yaw Rate Sensor Module
U0129 Lost Communication with Brake System Control Module
U0142 Lost Communication with Body Control Module "B"
U0155 Lost Communication with Combination Meter

DESCRIPTION

These DTCs are stored when a communication error occurs between the sensors and ECUs.

DTC No. Detection Item DTC Detection Condition Trouble Area
U0100 Lost Communication With ECM/PCM "A" While the vehicle is being driven at 1 km/h or 1 mph or more, a communication error between the ECM and the forward recognition camera is detected for approximately 5 seconds or more.

  • CAN communication system

  • ECM

  • Forward recognition camera
U0101 Lost Communication With TCM While the vehicle is being driven at 1 km/h or 1 mph or more, a communication error between the ECM and the forward recognition camera is detected for approximately 5 seconds or more.

  • CAN communication system

  • ECM

  • Forward recognition camera
U0123 Lost Communication with Yaw Rate Sensor Module While the vehicle is being driven at 1 km/h or 1 mph or more, a communication error between the yaw rate sensor (airbag ECU assembly) and the forward recognition camera is detected for approximately 5 seconds or more.

  • CAN communication system

  • Yaw rate sensor (Airbag ECU assembly)

  • Forward recognition camera
U0129 Lost Communication with Brake System Control Module 2 seconds after the engine switch is turned on (IG), a communication error between the skid control ECU (brake actuator assembly) and the forward recognition camera is detected for approximately 5 seconds or more.

  • CAN communication system

  • Skid control ECU (Brake actuator assembly)

  • Forward recognition camera
U0142 Lost Communication with Body Control Module "B" 2 seconds after the engine switch is turned on (IG), a communication error between the main body ECU (multiplex network body ECU) and the forward recognition camera is detected for approximately 5 seconds or more.

  • CAN communication system

  • Main body ECU (Multiplex network body ECU)

  • Forward recognition camera
U0155 Lost Communication with Combination Meter 2 seconds after the engine switch is turned on (IG), a communication error between the combination meter assembly and the forward recognition camera is detected for approximately 50 seconds or more.

  • CAN communication system

  • Combination meter assembly

  • Forward recognition camera

PROCEDURE


  1. CHECK FOR DTCs (ROAD SIGN ASSIST SYSTEM)


    1. Clear the DTCs.

      Click here


      Body Electrical > Road Sign Assist > Clear DTCs

    2. Make sure that the DTC detection conditions are met.

      Tech Tips

      If the conditions are not met, the system cannot detect the malfunction.

    3. Check for DTCs.

      Click here


      Body Electrical > Road Sign Assist > Trouble Codes
      Result
      Result Proceed to
      DTC U0100, U0101, U0123, U0129, U0142 and U0155 are not output A
      DTC U0100, U0101, U0123, U0129, U0142 or U0155 is output B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    GO TO CAN COMMUNICATION SYSTEM Click here