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Home >> Toyota >> 2017 >> 4Runner TRD Pro >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Gauges & Instrument Panels >> Meter / Gauge System - Diagnostic Codes & Symptom Tests >> Meter / Gauge System >> DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0129: Lost Communication with Brake System Control Module; DTC U0131: Lost Communication with Power Steering Control Module; DTC U0140: Lost Communication with Body Control Module; DTC U0151: Lost Communication With Restraints Control Module; DTC U0163: Lost Communication With Navigation Control Module; DTC U023A: Lost Communication with Front Camera Module [08/2019 - ] >> Procedure
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DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0129: Lost Communication with Brake System Control Module; DTC U0131: Lost Communication with Power Steering Control Module; DTC U0140: Lost Communication with Body Control Module; DTC U0151: Lost Communication With Restraints Control Module; DTC U0163: Lost Communication With Navigation Control Module; DTC U023A: Lost Communication with Front Camera Module [08/2019 - ]: Procedure

  1. CONFIRM DTC OUTPUT 
    1. Check for DTCs.

      Refer to DTC CHECK / CLEAR [08/2015 - ]

      RESULT

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

      HINT: 

      If CAN communication system DTC U0100, U0129, U0131, U0140, U0151, U0163 or U023A and another DTC are output at the same time, perform troubleshooting for CAN communication system DTC U0100, U0129, U0131, U0140, U0151, U0163 or U023A first.

    Result: 

    GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2019 - ] 

    Result: 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2019 - ]