DYNAMIC RADAR CRUISE CONTROL SYSTEM, Diagnostic DTC:C1A41

DTC Code DTC Name
C1A41 Brake Request Value Mismatch between ENG / EHV and Driving Support ECU

DESCRIPTION

The skid control ECU receives brake control request signals from the ECM and driving support ECU.

When the request signals received from the ECM and driving support ECU are not consistent, the skid control ECU determines that a malfunction has occurred and sends a malfunction signal to the driving support ECU.

DTC Code DTC Detection Condition Trouble Area
C1A41 While engine switch is on (IG), brake request signal from ECM and driving support ECU is inconsistent for 1 sec.

  • Electronically controlled brake system

  • SFI system

  • ECM

  • Skid control ECU

  • Driving support ECU

PROCEDURE


  1. CHECK FOR DTC (ELECTRONICALLY CONTROLLED BRAKE SYSTEM)


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      OK
      Electronically controlled brake system DTC is not output.

    NG

    GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM Click here

    OK

  2. CHECK FOR DTC (SFI SYSTEM)


    1. Clear the DTCs.


    2. Check for DTCs.


      Result
      Result Proceed to
      DTC is not output A
      DTC is output (for 1UR-FSE) B
      DTC is output (for 1UR-FE) C
      OK
      SFI system DTC is not output.

    B

    GO TO SFI SYSTEM Click here

    C

    GO TO SFI SYSTEM Click here

    A

  3. REPLACE ECM


    1. Replace the ECM.



    NEXT

  4. CHECK FOR DTC (SKID CONTROL ECU)


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      OK
      DTC C1A41 is not output.

    OK

    END (ECM IS DEFECTIVE)

    NG

  5. REPLACE SKID CONTROL ECU


    1. Replace the skid control ECU.



    NEXT

  6. CHECK FOR DTC (DRIVING SUPPORT ECU)


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      OK
      DTC C1A41 is not output.

    OK

    END (SKID CONTROL ECU IS DEFECTIVE)

    NG

    REPLACE DRIVING SUPPORT ECU Click here