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Home >> Toyota >> 2021 >> 4Runner TRD Pro >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Smart Key System (For Start Function) - Diagnostic Codes & Symptom Tests >> SMART KEY SYSTEM (for Start Function) >> DTC U1000: Lost Communication from ECM to TCM; DTC U0140: Lost Communication with Main Body ECU; DTC U0142: Lost Communication With Body Control Module "B"; DTC U0155: Lost Communication with Combination Meter; DTC U1117: Lost Communication with Accessory Gateway [08/2019 - ] >> Procedure
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DTC U1000: Lost Communication from ECM to TCM; DTC U0140: Lost Communication with Main Body ECU; DTC U0142: Lost Communication With Body Control Module "B"; DTC U0155: Lost Communication with Combination Meter; DTC U1117: Lost Communication with Accessory Gateway [08/2019 - ]: Procedure

  1. CHECK FOR DTC 
    1. Note any DTCs that are output.

      Refer to DTC CHECK / CLEAR [08/2019 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

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

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