DYNAMIC TORQUE CONTROL 4WD/AWD SYSTEM, Diagnostic DTC:U0073/86,U0100/85,U0126/84 and U0129/83

DTC Code DTC Name
U0073/86 Control Module Communication Bus OFF
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 inputs the signals sent from the ECM and skid control ECU (brake actuator assembly), and steering angle sensor (spiral with sensor cable sub-assembly) via the CAN communication system.

  • 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

U0073/86

Control Module Communication Bus OFF

  1. When the following continues for 5 seconds or more:

    • Signals from the 4WD ECU assembly are not received.

  3. When the following occurs 10 times consecutively:

    • A communication malfunction (bus off) occurs one or more times within 0.1 seconds.

  • CAN communication system

  • 4WD ECU assembly

U0100/85

Lost Communication with ECM / PCM "A"

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

    • The voltage of the IG1 terminal 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 voltage of the IG1 terminal is 10 V or more.

    • Communication with the steering angle sensor (spiral with sensor cable sub-assembly) cannot be performed.

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

    • The voltage of the IG1 terminal is 10 V or more.

    • The condition that communication with the steering angle sensor (spiral with sensor cable sub-assembly) cannot be performed occurs once within 5 seconds.

    • Occurs 10 times or more within 60 seconds.

  • CAN communication system

  • 4WD ECU assembly

  • Steering angle sensor (Spiral with sensor cable sub-assembly)

U0129/83

Lost Communication with Brake System Control Module

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

    • The voltage of the IG1 terminal 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. Record the output DTCs (dynamic torque control 4WD/AWD system ).

      Tip:

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

    Result

    Proceed to

    NEXT (for LHD)

    NEXT (for RHD)
    NEXT (for LHD)

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

    Click here

    NEXT (for RHD)

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

    Click here