ELECTRIC PARKING BRAKE SYSTEM, Diagnostic DTC:C13A6/42

DTC Code DTC Name
C13A6/42 Open or Short in Circuit of Motor

DESCRIPTION

DTC No. Detection Item DTC Detection Condition Trouble Area Memory Note
C13A6/42 Open or Short in Circuit of Motor

Both of following conditions are met:


  1. Engine switch on (IG) or electric parking brake switch (integration control and panel assembly) pulled to lock side with engine switch off.

  2. Power supply voltage and +B voltage are normal, but motor circuit is malfunctioning for approx. 1 to 2 seconds

  • Parking brake actuator assembly

  • Wire harness or connector

  • Parking brake ECU assembly

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

WIRING DIAGRAM

B005A5VE02

CAUTION / NOTICE / HINT

Note


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

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

PROCEDURE


  1. READ VALUE USING GTS (RH ACTUATOR MOTOR MALFUNCTION(OPEN/SHORT) / LH ACTUATOR MOTOR MALFUNCTION(OPEN/SHORT))


    1. Turn the engine switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the engine switch on (IG) and the GTS on.

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

    5. Check the values by referring to the table below.


      Chassis > Electric Parking Brake > Data List
      Tester Display Measurement Item Range Normal Condition
      RH Actuator Motor Malfunction(Open/Short) Parking brake motor RH (parking brake actuator assembly RH) open circuit or short circuit malfunction display Detected Malfunction or No Detected Malfunction No Detected Malfunction
      LH Actuator Motor Malfunction(Open/Short) Parking brake motor LH (parking brake actuator assembly LH) open circuit or short circuit malfunction display Detected Malfunction or No Detected Malfunction No Detected Malfunction

      Chassis > Electric Parking Brake > Data List
      Tester Display
      RH Actuator Motor Malfunction(Open/Short)
      LH Actuator Motor Malfunction(Open/Short)
      Result
      Proceed to
      NEXT

    NEXT

  2. INSPECT PARKING BRAKE WIRE ASSEMBLY

    B00589UC05
    *1 Parking Brake Wire Assembly - -
    *A RH *B LH
    *a Female connector - -

    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 between the wire harnesses or a short to ground.

    3. Inspect the parking brake wire assembly.

      Standard Resistance
      LH
      Tester Connection Condition Specified Condition
      mQ1 (Female connector)-2 - m2-2 (MRL+) Always Below 1 Ω
      mQ1 (Female connector)-4 - m2-1 (MRL-) Always Below 1 Ω
      mQ1 (Female connector)-2 - m2-1 (MRL-) Always 10 kΩ or higher
      mQ1 (Female connector)-4 - m2-2 (MRL+) Always 10 kΩ or higher
      mQ1 (Female connector)-2 - mQ1 (Female connector)-4 Always 10 kΩ or higher
      mQ1 (Female connector)-2 - mQ1 (Female connector)-1 Always 10 kΩ or higher
      mQ1 (Female connector)-2 - mQ1 (Female connector)-3 Always 10 kΩ or higher
      mQ1 (Female connector)-4 - mQ1 (Female connector)-1 Always 10 kΩ or higher
      mQ1 (Female connector)-4 - mQ1 (Female connector)-3 Always 10 kΩ or higher
      RH:
      Tester Connection Condition Specified Condition
      mQ1 (Female connector)-1 - m1-2 (MRR+) Always Below 1 Ω
      mQ1 (Female connector)-3 - m1-1 (MRR-) Always Below 1 Ω
      mQ1 (Female connector)-1 - m1-1 (MRR-) Always 10 kΩ or higher
      mQ1 (Female connector)-3 - m1-2 (MRR+) Always 10 kΩ or higher
      mQ1 (Female connector)-1 - mQ1 (Female connector)-3 Always 10 kΩ or higher
      mQ1 (Female connector)-1 - mQ1 (Female connector)-2 Always 10 kΩ or higher
      mQ1 (Female connector)-1 - mQ1 (Female connector)-4 Always 10 kΩ or higher
      mQ1 (Female connector)-3 - mQ1 (Female connector)-2 Always 10 kΩ or higher
      mQ1 (Female connector)-3 - mQ1 (Female connector)-4 Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE PARKING BRAKE WIRE ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (PARKING BRAKE ECU 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 Q25 parking brake ECU assembly connector.

    4. Disconnect the m1 and/or m2 parking brake actuator assembly connector.

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

      Standard Resistance
      LH
      Tester Connection Condition Specified Condition
      Q25-4 (MRL+) - m2-2 (MRL+) Always Below 1 Ω
      Q25-6 (MRL-) - m2-1 (MRL-) Always Below 1 Ω
      Q25-4 (MRL+) or m2-2 (MRL+) - Body ground Always 10 kΩ or higher
      Q25-6 (MRL-) or m2-1 (MRL-) - Body ground Always 10 kΩ or higher
      RH
      Tester Connection Condition Specified Condition
      Q25-1 (MRR+) - m1-2 (MRR+) Always Below 1 Ω
      Q25-3 (MRR-) - m1-1 (MRR-) Always Below 1 Ω
      Q25-1 (MRR+) or m1-2 (MRR+) - Body ground Always 10 kΩ or higher
      Q25-3 (MRR-) or m1-1 (MRR-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT PARKING BRAKE ACTUATOR ASSEMBLY


    1. Inspect the parking brake actuator assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE PARKING BRAKE ECU ASSEMBLY Click here

    NG

    REPLACE PARKING BRAKE ACTUATOR ASSEMBLY Click here