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Home >> Lexus >> 2020 >> ES 300h Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 33 (Lin Communication System (Except Hybrid) - Diagnostic Codes) >> LIN COMMUNICATION SYSTEM (for Gasoline Model) >> DTC B278C: Lost Communication with Power Source Control [06/2018 - ] >> Procedure

DTC B278C: Lost Communication with Power Source Control [06/2018 - ]: Procedure

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  1. CLEAR DTC 
    1. Clear the DTCs.

      Body Electrical > Smart Access > Clear DTCs 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  2

  2. CHECK FOR DTC 
    1. Check for DTCs.

      Body Electrical > Smart Access > Trouble Codes 

      OK

      DTC B278C is not output.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ] 

    Result: 

    NG 

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 

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