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 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. INF Code DTC Detection Condition Trouble Area
C1451/72 - Air bleeding has not been performed.

  • Brake fluid leaks

  • Air bleeding not performed

INSPECTION PROCEDURE

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 fluid Click here.


    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.


    NEXT

  3. RECONFIRM DTC


    1. Check if the same DTC is output Click here.

      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.


    NEXT

    END