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Home >> Toyota >> 2020 >> Avalon Limited >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 80 (Smart Key System (Keyless Start) - Diagnostic Codes (Hybrid)) >> SMART KEY SYSTEM (for Start Function, HV Model) >> DTC B278D: Malfunction of ID-BOX Recognition [04/2018 - ] >> Procedure

DTC B278D: Malfunction of ID-BOX Recognition [04/2018 - ]: Procedure

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  1. CLEAR DTC 
    1. Clear the DTCs.

      Body Electrical > Smart Key > Clear DTCs 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  2

  2. CHECK DTC OUTPUT 
    1. Check for DTCs.

      Body Electrical > Smart Key > Trouble Codes 

      HINT: 

      Before checking for DTCs, perform the "DTC Output Confirmation Operation" procedure.

      OK

      DTC B278D is not output.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    END 

    Result: 

    NG 

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [04/2018 - 08/2021]  , or refer to  REMOVAL [08/2021 - ]