ELECTRONICALLY CONTROLLED BRAKE SYSTEM, Diagnostic DTC:C1451/72

DTC Code DTC Name
C1451/72 Motor Drive Permission Malfunction

DESCRIPTION

If air bleeding has not been performed, the skid control ECU (brake booster with master cylinder assembly) stores DTC C1451/72 to prevent the entry of air due to pump motor operation.

DTC C1451/72 is stored when Invalid Mode is selected, the system will not return to normal until the air bleeding procedure is performed.

DTC No. Detection Item INF Code DTC Detection Condition Trouble Area Note
C1451/72 Motor Drive Permission Malfunction - Air bleeding has not been performed.

  • Brake fluid leaks

  • Air bleeding not performed

 Electronically controlled brake system DTC

PROCEDURE


  1. CHECK BRAKE FLUID LEVEL


    1. Check that the brake fluid level is sufficient.

      OK
      Brake fluid level is sufficient.

      Tech Tips


      • If the fluid level drops, check for fluid leaks, and repair as necessary.

      • If no fluid leaks exist, add and adjust the fluid level.

        Click here

      Result
      Proceed to
      OK
      NG

    NG

    CHECK AND REPAIR BRAKE FLUID LEAKS OR ADD FLUID

    OK

  2. PERFORM AIR BLEEDING


    1. Bleed the air from the brake system.

      Click here

      Tech Tips

      If air bleeding has been performed, this DTC will be cleared.

      Result
      Proceed to
      NEXT

    NEXT

  3. RECONFIRM DTC


    1. Check if the same DTC is output.

      Click here


      Chassis > ABS/VSC/TRC > Trouble Codes
      Result
      Result Proceed to
      DTC C1451/72 is output. A
      DTC C1451/72 is not output. B

    B

    END

    A

  4. CLEAR DTC


    1. Clear the DTCs.

      Click here


      Chassis > ABS/VSC/TRC > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

    END