DYNAMIC TORQUE CONTROL AWD SYSTEM, Diagnostic DTC:U0100/85, U0126/84, U0129/83

DTC Code DTC Name
U0100/85 Lost Communication with ECM / PCM "A"
U0126/84 Lost Communication with Steering Angle Sensor Module
U0129/83 Lost Communication with Brake System Control Module

DESCRIPTION

The 4WD ECU assembly receives signals from the ECM, skid control ECU (brake actuator assembly) and steering sensor via CAN communication.

When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding sensor.

DTC No. Detection Item DTC Detection Condition Trouble Area
U0100/85 Lost Communication with ECM / PCM "A"

  1. When both of the following continue for 2 seconds or more:


    • The IG1 terminal voltage is 10 V or more.


    • At a vehicle speed of 60 km/h (38 mph) or more, communication with the ECM cannot be performed.

  • CAN communication system

  • 4WD ECU assembly

  • ECM
U0126/84 Lost Communication with Steering Angle Sensor Module

  1. When both of the following continue for 1 second or more:


    • The IG1 terminal voltage is 10 V or more.

    • Communication with the steering sensor cannot be performed.

  2. When all of the following occur 10 times consecutively:


    • The IG1 terminal voltage is 10 V or more.


    • A communication malfunction with the steering sensor occurs once within 5 seconds, 10 times or more within 60 seconds.

  • CAN communication system

  • 4WD ECU assembly

  • Steering sensor
U0129/83 Lost Communication with Brake System Control Module

  1. When the following continues for 3 seconds or more:


    • The IG1 terminal voltage is 10 V or more.


    • Communication with the skid control ECU (brake actuator assembly) cannot be performed.

  • CAN communication system

  • 4WD ECU assembly

  • Skid control ECU (Brake actuator assembly)

PROCEDURE


  1. CHECK FOR DTC


    1. Check for DTCs.

      Click here


      Chassis > Four Wheel Drive > Trouble Codes

    2. Write down any output DTCs.

      Result
      Proceed to
      NEXT

    NEXT

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here