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.

      Tip:

      • 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

      Tip:

      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