DYNAMIC TORQUE CONTROL AWD SYSTEM, Diagnostic DTC:U0073/86

DTC Code DTC Name
U0073/86 Control Module Communication Bus OFF

DESCRIPTION

The 4WD ECU assembly stores this DTC when a communication malfunction is detected.

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.

  2. 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

CAUTION / NOTICE / HINT

Note

When the 4WD ECU assembly is replaced with a known good one from another vehicle, it is necessary to perform calibration.

Click here

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check for malfunctions in the CAN communication system.

      Click here

      Result
      Result Proceed to
      CAN communication DTCs are not output A
      CAN communication DTCs are output B

    B

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

    A

  2. RECONFIRM DTC


    1. Clear the DTCs.

      Click here


      Chassis > Four Wheel Drive > Clear DTCs

    2. Turn the engine switch off.

    3. Check if the same DTC is output.

      Click here


      Chassis > Four Wheel Drive > Trouble Codes
      Result
      Result Proceed to
      DTC U0073/86 is output A
      DTC U0073/86 is not output B

    A

    REPLACE 4WD ECU ASSEMBLY Click here

    B

    CHECK FOR INTERMITTENT PROBLEMS Click here