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Home >> Toyota >> 2007 >> Avalon XLS >> Repair and Diagnosis (Single Page) >> Brakes >> Anti-Lock Brakes >> Brakes - Abs >> Vehicle Stability Control System >> DTC U0073/94 Control Module Communication Bus OFF; DTC U0100/65 Lost Communication with ECM / PCM; DTC U0123/62 Lost Communication with Yaw Rate Sensor Module; DTC U0124/95 Lost Communication with Lateral Acceleration Sensor Module; DTC U0126/63 Lost Communication with Steering Angle Sensor Module >> Inspection Procedure
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Inspection Procedure

  1. CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION) 
    1. Using the intelligent tester, check for any momentary interruption in the wire harness and connector corresponding to a DTC (See CHECK FOR INTERMITTENT PROBLEMS ).

    DATA LIST: ABS/VSC/TRC 

    DATA LIST: ABS/VSC/TRC

    Item Measurement Item / Range (Display) Normal Condition
    EFI COM EFI communication open detection / OPN DET or NORMAL OPN DET: Momentary interruption
    NORMAL: Normal
    STEERING SEN STEERING SEN Steering sensor open detection / OPN DET or NORMAL OPN DET: Momentary interruption
    NORMAL: Normal
    YAWRATE SEN Yaw rate sensor open detection / OPN DET or NORMAL OPN DET: Momentary interruption
    NORMAL: Normal

    OK: 

    There are no momentary interruptions. 

    HINT:

    Perform the above inspection before removing the sensor and connector.

    NG:  Go to step  3

    OK: Go to Next Step 

  2. RECONFIRM DTC 
    1. Record the output DTCs (for ABS, VSC, and CAN communication).

      HINT:

      If the CAN communication system DTC and the relevant sensor DTCs are output simultaneously, troubleshoot the relevant sensor DTCs (for ABS and VSC) after the CAN communication system returns to normal.

    NEXT: REPAIR CAN COMMUNICATION SYSTEM 

  3. REPAIR OR REPLACE HARNESS AND CONNECTOR 
    1. Repair or replace the harness and connector.
    2. Check for any momentary interruption between the skid control ECU and each sensor or ECM (See CHECK FOR INTERMITTENT PROBLEMS ).
    3. Check that there is no momentary interruption.
  4. RECONFIRM DTC 
    1. Clear the DTC.
    2. Start the engine.
    3. Drive the vehicle and turn the steering wheel to the right and left at a speed of 9 mph (15 km/h) or more.
    4. Check that no CAN communication system DTC is output.
    5. If ABS and VSC DTCs are output, record them.

    Result 

    DTC OUTPUT RESULT

    Result Proceed to
    DTC output for the CAN communication system A
    No DTC Is output (ABS and VSC DTCs are output) B
    No DTC Is output (No ABS and VSC DTCs are output) C

    HINT:

    • The CAN communication system must be normal when repairing each sensor DTC (for ABS and VSC).
    • These DTCs may be restored due to a malfunction in the connector terminal connection, etc.

    B: REPAIR CIRCUIT INDICATED BY OUTPUT CODE 

    C: END 

    A: REPAIR CAN COMMUNICATION SYSTEM 

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