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Home >> Lexus >> 2021 >> ES 350 Luxury >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Smart Access System (For Start) (Except Hybrid) - Diagnostic Codes (2 Of 2) & Symptom Tests >> SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function, Gasoline Model) >> 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 [06/2018 - ] >> Procedure

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 [06/2018 - ]: Procedure

  1. CHECK FOR DTC 
    1. Check for DTCs and note any DTCs that are output.

      Refer to DTC CHECK / CLEAR [06/2018 - 09/2022] , or refer to DTC CHECK / CLEAR [09/2022 - ]

      Result

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      NEXT

    Result: 

    NEXT 

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ]