VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1203

DTC Code DTC Name
C1203 ECM Communication Circuit Malfunction

DESCRIPTION

The circuit is used to send control information from the skid control ECU (master cylinder solenoid) to the ECM, and engine control information from the ECM to the skid control ECU (master cylinder solenoid) via the CAN communication system.

DTC Code DTC Detection Condition Trouble Area
C1203 The engine/drivetrain specification and/or destination information from the ECM does not match the skid control ECU data. ECM

PROCEDURE


  1. CHECK ENGINE TYPE


    1. Check the engine type.

      Result
      Result Proceed to
      1VD-FTV A
      1UR-FE B
      1GR-FE C
      3UR-FE D

    B

    CHECK DTC (FOR ENGINE CONTROL SYSTEM) Click here

    C

    CHECK DTC (FOR ENGINE CONTROL SYSTEM) Click here

    D

    CHECK DTC (FOR ENGINE CONTROL SYSTEM) Click here

    A

  2. CHECK DTC (FOR ENGINE CONTROL SYSTEM)


    1. Check if the engine control system DTC is output (w/o DPF: See page , w/ DPF: Click here.

      Result
      Result Proceed to
      DTC is output A
      DTC is not output (w/o DPF) B
      DTC is not output (w/ DPF) C

    A

    REPLACE ECM Click here

    B

    GO TO ENGINE CONTROL SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    C

    GO TO ENGINE CONTROL SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

  3. CHECK DTC (FOR ENGINE CONTROL SYSTEM)


    1. Check if the engine control system DTC is output Click here.

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

    A

    REPLACE ECM Click here

    B

    GO TO ENGINE CONTROL SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

  4. CHECK DTC (FOR ENGINE CONTROL SYSTEM)


    1. Check if the engine control system DTC is output Click here.

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

    A

    REPLACE ECM Click here

    B

    GO TO ENGINE CONTROL SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

  5. CHECK DTC (FOR ENGINE CONTROL SYSTEM)


    1. Check if the engine control system DTC is output Click here.

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

    A

    REPLACE ECM Click here

    B

    GO TO ENGINE CONTROL SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here