LIGHTING SYSTEM(w/ Automatic Headlight Beam Level Control System), Diagnostic DTC:U0073, U0100, U0101, U0126, U0129, U0142, U0155, U0242

DTC Code DTC Name
U0073 Control Module Communication Bus Off
U0100 Lost Communication with ECM / PCM "A"
U0101 Lost Communication with TCM
U0126 Lost Communication with Steering Angle Sensor Module
U0129 Lost Communication with Brake System Control Module
U0142 Lost Communication with Body Control Module "B"
U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module
U0242 Lost Communication With Headlamp Control Module "B"

DESCRIPTION

These DTCs are stored if a CAN communication malfunction occurs between the headlight ECU sub-assembly LH and other ECUs.

DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from
U0073 Control Module Communication Bus Off The headlight ECU sub-assembly LH does not send/receive data. CAN communication system Headlight ECU sub-assembly LH
U0100 Lost Communication with ECM / PCM "A" The headlight ECU sub-assembly LH does not receive data from the ECM for approximately 10 seconds or more.

  • CAN communication system

  • ECM

 Headlight ECU sub-assembly LH
U0101 Lost Communication with TCM The headlight ECU sub-assembly LH does not receive data from the ECM for approximately 10 seconds or more.

  • CAN communication system

  • ECM

 Headlight ECU sub-assembly LH
U0126 Lost Communication with Steering Angle Sensor Module The headlight ECU sub-assembly LH does not receive data from the steering sensor for approximately 10 seconds or more.

  • CAN communication system

  • Steering sensor

 Headlight ECU sub-assembly LH
U0129 Lost Communication with Brake System Control Module The headlight ECU sub-assembly LH does not receive data from the skid control ECU (brake actuator assembly) for approximately 10 seconds or more.

  • CAN communication system

  • Skid control ECU (brake actuator assembly)

 Headlight ECU sub-assembly LH
U0142 Lost Communication with Body Control Module "B" The headlight ECU sub-assembly LH does not receive data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more.

  • CAN communication system

  • Main body ECU (multiplex network body ECU)

 Headlight ECU sub-assembly LH
U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module The headlight ECU sub-assembly LH does not receive data from the combination meter assembly for approximately 30 seconds or more.

  • CAN communication system

  • Combination meter assembly

 Headlight ECU sub-assembly LH
U0242 Lost Communication With Headlamp Control Module "B" The headlight ECU sub-assembly LH does not receive data from the headlight ECU sub-assembly RH for approximately 10 seconds or more.

  • CAN communication system

  • Headlight ECU sub-assembly RH

 Headlight ECU sub-assembly LH

PROCEDURE


  1. CLEAR DTC


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / HL AutoLeveling / Trouble Codes.

    5. Clear the DTCs.


      Body Electrical > HL AutoLeveling > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  2. CHECK FOR DTC


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Wait 35 seconds or more.

    4. Turn the GTS on.

    5. Enter the following menus: Body Electrical / HL AutoLeveling / Trouble Codes.

    6. Check for DTCs.


      Body Electrical > HL AutoLeveling > Trouble Codes
      OK
      DTCs are not output.
      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    GO TO CAN COMMUNICATION SYSTEM Click here