VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:U0073, U0100, U0101, U0126

DTC Code DTC Name
U0073 Control Module Communication Bus "A" Off
U0100 Lost Communication with ECM / PCM "A"
U0101 Lost Communication with TCM
U0126 Lost Communication with Steering Angle Sensor Module

DESCRIPTION

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

DTC No. DTC Detection Condition Trouble Area
U0073 The +BS terminal voltage is between 9.6 and 16.5 V and bus off is judged for 0.1 seconds or more. CAN communication system
U0100 The +BS terminal voltage is between 9.6 and 16.5 V, the vehicle speed is 6 km/h (4 mph) or more, and signals cannot be sent to the ECM for 0.5 seconds or more.

  • CAN communication system

  • Skid control ECU

  • ECM
U0123 The +BS terminal voltage is between 9.6 and 16.5 V, the vehicle speed is 6 km/h (4 mph) or more, and signals cannot be sent to the TCM for 0.5 seconds or more.

  • CAN communication system

  • Skid control ECU

  • TCM
U0126 The +BS terminal voltage is between 9.6 and 16.5 V, the vehicle speed is 6 km/h (4 mph) or more, and signals from the steering sensor cannot be received for 0.1 seconds or more.

  • CAN communication system

  • Skid control ECU

  • steering sensor

PROCEDURE


  1. RECONFIRM DTC


    1. Clear the DTCs Click here.

    2. Turn the ignition switch off.

    3. Start the engine.

    4. Drive the vehicle at a speed of 15 km/h (9 mph) or more and turn the steering wheel to the right and left.

    5. Check that no CAN communication system DTC is output Click here.

    6. If VSC system DTCs are output, record them Click here.

      Result
      Result Proceed to
      DTC is not output. A
      DTC is output. B
      CAN communication system DTC is output. C

      Tech Tips

      The CAN communication system must be normal when performing troubleshooting for sensor DTCs (for VSC system).


    A

    CHECK FOR INTERMITTENT PROBLEMS Click here

    B

    REPAIR CIRCUITS INDICATED BY OUTPUT DTCS Click here

    C

    INSPECT CAN COMMUNICATION SYSTEM Click here