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Home >> Lexus >> 2014 >> GS 350 Base, RWD >> Repair and Diagnosis (Single Page) >> Steering >> Manual Steering >> Variable Gear Ratio Steering System (Diagnostic Codes & Symptom Tests) >> Variable Gear Ratio Steering System >> DTC U0100/56: Lost Communication with ECM / PCM "A"; DTC U0125/56: Lost Communication with Yaw Rate Sensor Module; DTC U0126/56: Lost Communication with Steering Angle Sensor Module; DTC U0129/56: Lost Communication with Brake System Control Module; DTC U0131/56: Lost Communication with Power Steering Control Module; DTC U0134/56: Lost Communication with DRS Module [09/2013 - ] >> Procedure
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DTC U0100/56: Lost Communication with ECM / PCM "A"; DTC U0125/56: Lost Communication with Yaw Rate Sensor Module; DTC U0126/56: Lost Communication with Steering Angle Sensor Module; DTC U0129/56: Lost Communication with Brake System Control Module; DTC U0131/56: Lost Communication with Power Steering Control Module; DTC U0134/56: Lost Communication with DRS Module [09/2013 - ]: Procedure

  1. CHECK DTC 
    1. Clear the DTCs. Refer to DTC CHECK / CLEAR [09/2013 - ] .
    2. Check for DTCs. Refer to DTC CHECK / CLEAR [09/2013 - ] .
      RESULT

      Result Proceed to
      DTC is not output A
      DTC is output B

    B → See step   3 

    A → See step   2 

  2. USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2013 - ] 
  3. GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2013 - ]