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Home >> Lexus >> 2007 >> SC 430 >> Repair and Diagnosis >> Brakes >> Traction Control >> Brake Control >> Vehicle Stability Control System >> DTC U0073/42 Control Module Communication Bus OFF; DTC U0100/65 Lost Communication with ECM / PCM >> Inspection Procedure
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Inspection Procedure

HINT:

This circuit uses the CAN communication system. Therefore, if there are any malfunctions in the communication circuit, one or more DTCs in the CAN communication system will be output.

  1. RECONFIRM DTC 
    1. Clear the DTC.
    2. Start the engine.
    3. Drive the vehicle at a speed of 15 km/h (9 mph) and turn the steering wheel to the right and left.
    4. Check that no CAN communication system DTC is output.
    5. If ABS and VSC DTCs are output, record them.

      Result 

      RESULT CHART

      Result Proceed to
      DTC is output for CAN communication system A (see PROBLEM SYMPTOMS TABLE )
      DTC is output (ABS and VSC DTCs are output) B (see DIAGNOSTIC TROUBLE CODE CHART  )
      DTC is not output C

    B: REPAIR DTCS CIRCUITS INDICATED BY OUTPUT 

    C: END 

    A:  GO to CAN COMMUNICATION SYSTEM