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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (Smart Key System (For Start, HV) - Diagnostic Codes (1 Of 2)) >> SMART KEY SYSTEM (for Start Function, HV Model) >> DTC B278D-96: ID-BOX Component Internal Failure [11/2023 - ] >> Procedure

DTC B278D-96: ID-BOX Component Internal Failure [11/2023 - ]: Procedure

WARNING: This page is about a different variant/trim than selected.
  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.

      Result

      Result Proceed to
      B278D-96 is not output A
      B278D-96 is output B

    Result: 

    A 

    END 

    Result: 

    B 

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [11/2023 - ] 

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