ELECTRIC PARKING BRAKE SYSTEM, Diagnostic DTC:C13A8/44

DTC Code DTC Name
C13A8/44 Tension Sensor Malfunction

DESCRIPTION

The tension sensor is built into the parking brake with bracket actuator assembly. It detects the tension value of the parking brake cable and outputs the value to the parking brake ECU assembly.

DTC No. Detection Item DTC Detection Condition Trouble Area Memory Note
C13A8/44 Tension Sensor Malfunction

All of following conditions are met:


  1. Engine switch is on (IG), or when engine switch is off, electric parking brake switch assembly lock control is operating.

  2. Tension sensor output value is abnormal; difference between output values of 2 tension sensors; or tension sensor power supply voltage is abnormal.

  3. Problem occurs for Approximately 1 second.

  • Parking brake with bracket 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

B000W3NE01

CAUTION / NOTICE / HINT

Note


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

  • The electric parking brake may still operate up to 20 seconds after the engine switch is turned off. Before disconnecting connectors or fuses, turn the engine switch off and wait 20 seconds or more.

  • Cable tension may fall below the prescribed value and C13A8/44 may be stored when the parking brake is forcibly released, but this is not a malfunction.

  • If the parking brake ECU assembly or parking brake with bracket actuator assembly is replaced, perform the "Reset Memory" and "Acquire Tension Sensor Zero Point" procedures.

    Click here

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTC.

      Click here


      Chassis > Electric Parking Brake > Clear DTCs

    2. Turn the engine switch off.

      Result
      Proceed to
      NEXT

    NEXT

  2. CHECK DTC


    1. Turn the engine switch on (IG).

    2. Operate the electric parking brake.

    3. Check for DTC.

      Click here


      Chassis > Electric Parking Brake > Trouble Codes
      Result
      Result Proceed to
      DTC C13A8/44 is output A
      DTC C13A8/44 is not output B

    B

    USE SIMULATION METHOD TO CHECK Click here

    A

  3. CHECK HARNESS AND CONNECTOR (PARKING BRAKE ECU ASSEMBLY - PARKING BRAKE WITH BRACKET ACTUATOR ASSEMBLY)


    1. Turn the engine switch off.

    2. Disconnect the X66 and X67 parking brake ECU assembly connectors.

    3. Disconnect the X68 parking brake with bracket actuator assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      X66-3 (GND1) - Body ground Always Below 1 Ω
      X67-8 (TSEN) - X68-5 (TSEN) Always Below 1 Ω
      X67-8 (TSEN) or X68-5 (TSEN) - Body ground Always 10 kΩ or higher
      X67-6 (TSN2) - X68-10 (TSN2) Always Below 1 Ω
      X67-6 (TSN2) or X68-10 (TSN2) - Body ground Always 10 kΩ or higher
      X67-7 (VT) - X68-6 (VT) Always Below 1 Ω
      X67-7 (VT) or X68-6 (VT) - Body ground Always 10 kΩ or higher
      X67-14 (TGND) - X68-1 (TGND) Always Below 1 Ω
      X67-14 (TGND) or X68-1 (TGND) - Body ground Always 10 kΩ or higher
      X67-10 (SG) - X68-2 (SG) Always Below 1 Ω
      X67-10 (SG) or X68-2 (SG) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK PARKING BRAKE ECU ASSEMBLY (VT VOLTAGE)


    1. Turn the engine switch off.

    2. Connect the parking brake ECU assembly connector.

    3. Connect the parking brake with bracket actuator assembly connector.

    4. Turn the engine switch on (IG).

    5. B000TQKC12
      *a

      Component with harness connected

      (Parking Brake ECU Assembly)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      X67-7 (VT) - X67-14 (TGND) Engine switch on (IG) 4.75 to 5.25 V
      Result
      Proceed to
      OK
      NG

    NG

    CHECK PARKING BRAKE ECU ASSEMBLY (VT VOLTAGE) Click here

    OK

  5. CHECK PARKING BRAKE ECU ASSEMBLY (TSEN, TSN2 - TGND)


    1. B000TQKC13
      *a

      Component with harness connected

      (Parking Brake ECU Assembly)

      Measure the voltage between the terminals below.

      Tester Connection Switch Condition
      (A) X67-6 (TSN2) - X67-14 (TGND) Engine switch on (IG)
      (B) X67-8 (TSEN) - X67-14 (TGND) Engine switch on (IG)

      Tech Tips

      Take a note of the measurements.

    2. Turn the engine switch off.

    3. Connect the GTS to the DLC3.

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

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

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

      Tech Tips

      This procedure is performed to compare the difference between the actual voltage and the voltage recognized by the ECU.

      Electric Parking Brake
      Tester Display Measurement Item Range Switch Condition Normal Condition
      (1) Tension1 Voltage Tension sensor 1 voltage display

      min.: 0.000 V

      max.: 5.000 V

      		 Engine switch on (IG) Voltage (A) +/- 0.2 V is 0.3 to 4.7 V
      (2) Tension2 Voltage Tension sensor 2 voltage display

      min.: 0.000 V

      max.: 5.000 V

      		 Engine switch on (IG) Voltage (B) +/- 0.2 V is 0.3 to 4.7 V
      (3) Invalid Tension Sensor Comp Tension sensor comparison invalid display Enable or Disable Engine switch on (IG) Enable

      Chassis > Electric Parking Brake > Data List
      Tester Display
      Tension1 Voltage
      Tension2 Voltage
      Invalid Tension Sensor Comp
      OK
      Values are as shown in normal condition.
      Result
      Result Proceed to
      (1), (2) or (3) are NG A
      (1), (2) and (3) are OK B

    B

    READ VALUE USING GTS (DATA LIST) Click here

    A

  6. INSPECT PARKING BRAKE ECU ASSEMBLY


    1. Turn the engine switch off.

    2. Remove the parking brake ECU assembly.

      Click here

    3. B000VKUC09
      *a

      Component without harness connected

      (Parking Brake ECU Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      X67-8 (TSEN) - X66-3 (GND1) Always 4 to 6 kΩ
      X67-6 (TSN2) - X66-3 (GND1) Always 4 to 6 kΩ
      X67-14 (TGND) - X66-3 (GND1) Always Below 1 Ω
      X67-10 (SG) - X66-3 (GND1) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE PARKING BRAKE WITH BRACKET ACTUATOR ASSEMBLY Click here

    NG

    REPLACE PARKING BRAKE ECU ASSEMBLY Click here

  7. CHECK PARKING BRAKE ECU ASSEMBLY (VT VOLTAGE)


    1. Turn the engine switch off.

    2. Disconnect the parking brake with bracket actuator assembly connector.

    3. Turn the engine switch on (IG).

    4. B000UXHC05
      *a

      Front view of wire harness connector

      (to Parking Brake with Bracket Actuator Assembly)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      X68-6 (VT) - X68-1 (TGND) Engine switch on (IG) 4.75 to 5.25 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE PARKING BRAKE WITH BRACKET ACTUATOR ASSEMBLY Click here

    NG

    REPLACE PARKING BRAKE ECU ASSEMBLY Click here

  8. READ VALUE USING GTS (DATA LIST)


    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 Diagnostic Note
      +B Voltage Value Electric parking brake motor power source information display Lo, Mid or Hi Hi -
      Invalid Tension Sensor Output Tension sensor output invalid display Enable or Disable Enable -
      Invalid Tension Sensor PWR Tension sensor power source invalid display Enable or Disable Enable -
      Invalid Tension Sensor Comp Tension sensor comparison invalid display Enable or Disable Enable -

      Chassis > Electric Parking Brake > Data List
      Tester Display
      +B Voltage Value
      Invalid Tension Sensor Output
      Invalid Tension Sensor PWR
      Invalid Tension Sensor Comp
      OK
      Values are as shown in normal condition.
      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    REPLACE PARKING BRAKE ECU ASSEMBLY Click here