ELECTRONICALLY CONTROLLED BRAKE SYSTEM, Diagnostic DTC:C1203/95

DTC Code DTC Name
C1203/95 ECM Communication Circuit Malfunction

DESCRIPTION

The circuit is used to send TRC and VSC information from the skid control ECU to the power management control ECU, and hybrid control system information from the power management control ECU to the skid control ECU via the CAN communication system.

DTC Code INF Code DTC Detection Condition Trouble Area
C1203/95 -

Any of the following is detected:


  1. No stored information for destination.

  2. No stored information whether on VSC is in operation or not.

  3. Destination information from power management control ECU does not match with stored value.

  • Power management control ECU

  • Main body ECU (Instrument panel junction block)

  • Suspension control ECU

  • Skid control ECU

INSPECTION PROCEDURE

Note

When replacing the skid control ECU, perform initialization and calibration of the linear solenoid valve Click here.

PROCEDURE


  1. PERFORM INITIALIZATION AND CALIBRATION OF LINEAR SOLENOID VALVE


    1. Perform initialization and calibration of the linear solenoid valve Click here.

      Tech Tips

      Before carrying out Perform Initialization and Calibration of Linear Solenoid Valve, C1203/95 will output.


    NEXT

  2. RECONFIRM DTC


    1. Turn the power switch off.

    2. Clear the DTCs Click here.

    3. Turn the power switch on (IG).

    4. Check if the same DTC is recorded Click here.

      Result
      Result Proceed to
      DTC (C1203/95) is output A
      DTC (C1203/95) is not output B

    B

    END

    A

  3. CHECK PART NUMBER


    1. Turn the power switch off.

    2. Check that a proper power management control ECU, main body ECU (instrument panel junction block) and suspension control ECU are installed.

      OK
      Proper ECUs are installed.

    3. Check if the power management control ECU, main body ECU (instrument panel junction block) and suspension control ECU had been replaced before the DTC was recorded.

      OK
      ECU had not been replaced.
      Result
      Result Proceed to
      OK A
      NG (A proper power management control ECU is not installed and/or the power management control ECU had been replaced) B
      NG (A proper main body ECU (instrument panel junction block) is not installed and/or the main body ECU (instrument panel junction block) had been replaced) C
      NG (A proper suspension control ECU is not installed and/or the suspension control ECU had been replaced) D

    B

    REPLACE POWER MANAGEMENT CONTROL ECU

    C

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK) Click here

    D

    REPLACE SUSPENSION CONTROL ECU

    A

  4. CHECK PART NUMBER (SKID CONTROL ECU)


    1. Check that a proper skid control ECU is installed.

      OK
      Proper skid control ECU is installed.

    2. Check if the skid control ECU had been replaced before the DTC was recorded.

      OK
      Skid control ECU had not been replaced.
      Result
      Result Proceed to
      OK A
      NG (The skid control ECU had been replaced) B
      NG (A proper skid control ECU is not installed) C

    B

    PERFORM INITIALIZATION AND CALIBRATION OF LINEAR SOLENOID VALVE Click here

    C

    REPLACE SKID CONTROL ECU Click here

    A

  5. RECONFIRM DTC


    1. Clear the DTCs Click here.

    2. Turn the power switch on (IG).

    3. Check if the same DTC is recorded Click here.

      Result
      Result Proceed to
      DTC (C1203/95) is not output A
      DTC (C1203/95) is output B

    B

    REPLACE SKID CONTROL ECU Click here

    A

    CHECK FOR INTERMITTENT PROBLEMS Click here