ELECTRIC PARKING BRAKE SYSTEM, Diagnostic DTC:C13A7/43

DTC Code DTC Name
C13A7/43 Actuator Malfunction

DESCRIPTION

DTC No. Detection Item DTC Detection Condition Trouble Area Memory Note
C13A7/43 Actuator Malfunction

Both of following conditions are met:


  1. Electric parking brake is operating

  2. One of following is detected: Motor lock, gear lock, spinning or repeated slipping

  • Parking brake actuator assembly

  • Rear brake

  • Wire harness or connector

 DTC stored An electric parking brake system malfunction is displayed on the multi-information display.

WIRING DIAGRAM

Click here

CAUTION / NOTICE / HINT

Note


  • This DTC may be stored when the system changes to pad replacement mode, but this is not a malfunction.

  • This DTC may be stored when the parking brake is forcibly released, but this is not a malfunction.

  • Before disconnecting connectors or fuses, turn the engine switch off and wait 20 seconds or more.

  • When replacing the skid control ECU (brake actuator assembly), operate the electric parking brake switch assembly as the parking brake indicator light (red) blinks when the engine switch is first turned on (IG).

PROCEDURE


  1. CHECK DTC


    1. Check for DTCs.

      Click here


      Chassis > ABS/VSC/TRC/EPB > Trouble Codes
      Result
      Result Proceed to
      Only DTC C13A7/43 is output A
      DTCs other than C13A7/43 are output B

    B

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    A

  2. READ VALUE USING GTS (PERMISSION OF RH INTERLOCKING PKB LOCK / PERMISSION OF LH INTERLOCKING PKB LOCK)


    1. Turn the engine switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the engine switch on (IG).

    4. Turn the GTS on.

    5. Enter the following menus: Chassis / Electric Parking Brake / Data List.

    6. Read the Data List according to the display on the GTS.


      Chassis > ABS/VSC/TRC/EPB > Data List
      Tester Display Measurement Item Range Normal Condition
      Permission of RH Interlocking PKB Lock Parking brake actuator assembly RH parking brake lock control permission status OK or NG OK
      Permission of LH Interlocking PKB Lock Parking brake actuator assembly LH parking brake lock control permission status OK or NG OK

      Chassis > ABS/VSC/TRC/EPB > Data List
      Tester Display
      Permission of RH Interlocking PKB Lock
      Permission of LH Interlocking PKB Lock
      Result
      Proceed to
      NEXT

    NEXT

  3. INSPECT PARKING BRAKE WIRE ASSEMBLY

    B005O00C03
    *A RH *B LH
    *a Front view of Parking Brake Wire Assembly *b (to wire harness connector)
    *c (to Parking Brake Actuator Assembly) - -

    1. Remove the parking brake wire assembly.

      Click here

    2. Check the parking brake wire assembly for damage.

      OK
      No damage.

      Tech Tips

      If damaged, there may be a short in the wire harness or a short to ground.

    3. Inspect the parking brake wire assembly.

      Standard Resistance
      RH
      Tester Connection Condition Specified Condition
      oR1-2 (MRR-) - o1-1 (MRR-) Always Below 1 Ω
      oR1-2 (MRR-) - o1-2 (MRR+) Always 10 kΩ or higher
      oR1-2 (MRR-) or o1-1 (MRR-) - Body ground Always 10 kΩ or higher
      oR1-1 (MRR+) - o1-2 (MRR+) Always Below 1 Ω
      oR1-1 (MRR+) - o1-1 (MRR-) Always 10 kΩ or higher
      oR1-1 (MRR+) or o1-2 (MRR+) - Body ground Always 10 kΩ or higher
      LH
      Tester Connection Condition Specified Condition
      oS1-2 (MRL-) - o2-1 (MRL-) Always Below 1 Ω
      oS1-2 (MRL-) - o2-2 (MRL+) Always 10 kΩ or higher
      oS1-2 (MRL-) or o2-1 (MRL-) - Body ground Always 10 kΩ or higher
      oS1-1 (MRL+) - o2-2 (MRL+) Always Below 1 Ω
      oS1-1 (MRL+) - o2-1 (MRL-) Always 10 kΩ or higher
      oS1-1 (MRL+) or o2-2 (MRL+) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE PARKING BRAKE WIRE ASSEMBLY Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) - PARKING BRAKE ACTUATOR ASSEMBLY)


    1. Turn the engine switch off.

    2. Make sure the parking brake wire assembly is securely installed.

    3. Disconnect the A41 skid control ECU (brake actuator assembly) connector.

    4. Disconnect the o1 or o2 parking brake actuator assembly connector.

    5. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      RH
      Tester Connection Condition Specified Condition
      A41-13 (MRR+) - o1-2 (MRR+) Always Below 1 Ω
      A41-12 (MRR-) - o1-1 (MRR-) Always Below 1 Ω
      A41-13 (MRR+) or o1-2 (MRR+) - Body ground Always 10 kΩ or higher
      A41-12 (MRR-) or o1-1 (MRR-) - Body ground Always 10 kΩ or higher
      LH
      Tester Connection Condition Specified Condition
      A41-3 (MRL+) - o2-2 (MRL+) Always Below 1 Ω
      A41-2 (MRL-) - o2-1 (MRL-) Always Below 1 Ω
      A41-3 (MRL+) or o2-2 (MRL+) - Body ground Always 10 kΩ or higher
      A41-2 (MRL-) or o2-1 (MRL-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT REAR BRAKE AND PARKING BRAKE ACTUATOR ASSEMBLY


    1. Enter rear brake pad replacement mode.

      Click here

    2. Turn the engine switch off.

    3. Check that the rotating parts are not seized or the actuator is not spinning freely.


      1. Check that the parking brake actuator assembly is installed properly to the rear brake caliper and that it is not spinning freely.

        For the parking brake actuator assembly removal procedure: Click here

      2. Check that there is no damage to the rotating parts from the parking brake actuator assembly to the rear brake caliper.

      3. Inspect the parking brake actuator assembly and check that it operates correctly.

        Click here

      4. Check that the rear brake caliper threaded part rotates and that the rear disc brake piston moves outward.

        Tech Tips

        For the check procedures, refer to the parking brake forced release method when not using the GTS.

        Click here

      Tech Tips

      Return to normal mode after work is complete.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE PARKING BRAKE ACTUATOR ASSEMBLY Click here

    NG

    REPAIR OR REPLACE NECESSARY PARTS