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Home >> Lexus >> 2020 >> LS 500 Base, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Smart Access System (For Start) - Diagnostic Codes (1 Of 2) >> SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function) >> DTC B2782: Power Source Control ECU Malfunction [10/2022 - 10/2023] >> Procedure

DTC B2782: Power Source Control ECU Malfunction [10/2022 - 10/2023]: Procedure

  1. CHECK FOR DTC 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Smart Key / Trouble Codes.
    5. Check for DTCs.

      Body Electrical > Smart Access > Trouble Codes 

      Result

      Result Proceed to
      DTC B2785 is not output. A
      DTC B2785 is output. B

    Result: 

    GO TO LIN COMMUNICATION SYSTEM (DTC B2785). Refer to  DTC B2785: Communication Malfunction between ECUs Connected by LIN [10/2022 - 10/2023] 

    Result: 

    See step  2

  2. CLEAR DTC 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Smart Key / Clear DTCs.
    5. Clear the DTCs.

      Body Electrical > Smart Access > Clear DTCs 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  3

  3. CHECK FOR DTC 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Smart Key / Trouble Codes.
    5. Check for DTCs.

      Body Electrical > Smart Access > Trouble Codes 

      Result

      Result Proceed to
      DTC is output A
      DTC is not output B

    Result: 

    REPLACE ID CODE BOX (IMMOBILISER CODE ECU). Refer to  REMOVAL [10/2022 - 10/2023] 

    Result: 

    END