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Home >> Scion >> 2012 >> iQ >> Repair and Diagnosis (Single Page) >> Brakes >> Anti-Lock Brakes >> Vehicle Stability Control System (Diagnostic Codes & Symptom Tests) >> Vehicle Stability Control System >> DTC U0073: Control Module Communication Bus OFF; DTC U0100: Lost Communication with ECM / PCM; DTC U0123: Lost Communication with Yaw Rate Sensor Module; DTC U0124: Lost Communication with Lateral Acceleration Sensor Module; DTC U0126: Lost Communication with Steering Angle Sensor Module >> Procedure

DTC U0073: Control Module Communication Bus OFF; DTC U0100: Lost Communication with ECM / PCM; DTC U0123: Lost Communication with Yaw Rate Sensor Module; DTC U0124: Lost Communication with Lateral Acceleration Sensor Module; DTC U0126: Lost Communication with Steering Angle Sensor Module: Procedure

  1. RECONFIRM DTC 
    1. Turn the ignition switch off.
    2. Record the output DTCs. Refer to DTC CHECK / CLEAR .
      RESULT

      Result Proceed to
      DTC output A
      DTC not output B

    B → See step   3 

    A → See step   2 

  2. CHECK CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING 
  3. CHECK FOR INTERMITTENT PROBLEMS. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING