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DTC B1003: ECU Malfunction [10/2018 - 07/2022]: Procedure

  1. RECONFIRM DTC OUTPUT 
    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 / Central Gateway / Trouble Codes.

      Body Electrical > Central Gateway > Trouble Codes 

      Result

      Result Proceed to
      DTC B1003 is not output from the central gateway ECU (network gateway ECU) A
      DTC B1003 is output from the central gateway ECU (network gateway ECU) B

    Result: 

    A 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - ] 

    Result: 

    B 

    REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU). Refer to  REMOVAL [10/2018 - 07/2022] 

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