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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 B2790-46: ID-BOX Calibration / Parameter Memory Failure [11/2023 - ] >> Procedure

DTC B2790-46: ID-BOX Calibration / Parameter Memory Failure [11/2023 - ]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. REPLACE ID CODE BOX (IMMOBILISER CODE ECU) 
    1. Replace the ID code box (immobiliser code ECU) with a new one.

      HINT: 

      Refer to REMOVAL [11/2023 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  2

  2. CLEAR DTC 
    1. Using the GTS, clear the DTCs.

      Body Electrical > Smart Key > Clear DTCs 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  3

  3. REGISTER RECOGNITION CODE 
    1. Register the recognition codes to the ECUs.

      Refer to REGISTRATION [11/2023 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  4

  4. REGISTER ECU COMMUNICATION ID 
    1. Register the ECU communication ID codes.

      Refer to REGISTRATION [11/2023 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  5

  5. CHECK DTC 
    1. Using the GTS, check if DTC is output.

      Body Electrical > Smart Key > Trouble Codes 

      Result

      Result Proceed to
      B2790-46 is output A
      B2790-46 is not output B

    Result: 

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

    Result: 

    END (ID CODE BOX (IMMOBILISER CODE ECU) WAS DEFECTIVE)