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Home >> Lexus >> 2017 >> ES 350 >> Repair and Diagnosis >> Electrical >> Starter >> Smart Access System (For Start Function) (Diagnostic Codes & Symptom Tests) >> Smart Access System With Push-Button Start (For Start Function) >> DTC U0100: Lost Communication with ECM / PCM; DTC U0140: Lost Communication with Main Body ECU; DTC U0142: Lost Communication with Main Body ECU; DTC U0155: Lost Communication with Combination Meter (07/2015 -) >> Procedure
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DTC U0100: Lost Communication with ECM / PCM; DTC U0140: Lost Communication with Main Body ECU; DTC U0142: Lost Communication with Main Body ECU; DTC U0155: Lost Communication with Combination Meter (07/2015 -): Procedure

  1. CHECK FOR DTC 
    1. Note any DTCs that are output (Refer to DTC CHECK / CLEAR (07/2015 -) ).

      Result

      Result Proceed to
      w/o Central Gateway ECU A
      w/ Central Gateway ECU B

    Result:  A

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) 

    (Refer to HOW TO PROCEED WITH TROUBLESHOOTING (07/2015 -) )

    Result:  B

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) 

    (Refer to HOW TO PROCEED WITH TROUBLESHOOTING (07/2015 -) )