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 electric parking brake ECU.

DTC Code Detection Condition Trouble Area
C13A8/44

All of following conditions are met:


  1. Electric parking brake ECU is ON (engine switch is on (IG), or 15 sec. after engine switch is off and electric parking brake switch 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 approx. 1 sec.

  • Parking brake with bracket actuator assembly

  • Wire harness or connector

  • Electric parking brake ECU

WIRING DIAGRAM

A01GLYFE07

INSPECTION PROCEDURE

Note


  • If the electric parking brake ECU or parking brake with bracket actuator assembly is replaced, perform the "Reset Memory" and "ACQUIRE TENSION SENSOR ZERO POINT" procedures Click here.

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

  • This DTC may be output if a manual release cable is used. There is no malfunction. Perform the "Reset Memory" and "ACQUIRE TENSION SENSOR ZERO POINT" procedures Click here.

PROCEDURE


  1. CLEAR DTC


    1. Turn the engine switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the engine switch on (IG) and the tester ON.

    4. Clear the DTC Click here.


    NEXT

  2. CHECK DTC


    1. Turn the engine switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the engine switch on (IG) and the tester ON.

    4. Check for DTC Click here.

      Result
      Result Proceed to
      DTC is output A
      DTC is not output B

    B

    USE SIMULATION METHOD TO CHECK Click here

    A

  3. CHECK HARNESS AND CONNECTOR (ECU - ACTUATOR)


    1. Disconnect the S48 ECU connector.

    2. Disconnect the S32 actuator connector.

    3. A01GJ40E06

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

      Standard resistance
      Tester Connection Condition Specified Condition
      S48-8 (TSEN) - S32-5 (TSEN) Always Below 1 Ω
      S48-8 (TSEN) - Body ground Always 10 kΩ or higher
      S48-6 (TSN2) - S32-10 (TSN2) Always Below 1 Ω
      S48-6 (TSN2) - Body ground Always 10 kΩ or higher
      S48-7 (VT) - S32-6 (VT) Always Below 1 Ω
      S48-7 (VT) - Body ground Always 10 kΩ or higher
      S48-14 (TGND) - S32-1 (TGND) Always Below 1 Ω
      S48-14 (TGND) - Body ground Always 10 kΩ or higher
      S48-10 (SG) - S32-2 (SG) Always Below 1 Ω
      S48-10 (SG) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK ELECTRIC PARKING BRAKE ECU (VT VOLTAGE)


    1. A01GHSQE03

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      S48-7 (VT) - S48-14 (TGND) Engine switch on (IG) 4.75 to 5.25 V
      Result
      Result Proceed to
      NG A
      OK B

    B

    CHECK ELECTRIC PARKING BRAKE ECU (TSEN, TSN2, TGND) Click here

    A

  5. CHECK ELECTRIC PARKING BRAKE ECU (VT VOLTAGE)


    1. Disconnect the S32 actuator connector.

    2. A01GJXAE06

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      S32-6 (VT) - S32-1 (TGND) Engine switch on (IG) 4.75 to 5.25 V

    NG

    REPLACE ELECTRIC PARKING BRAKE ECU Click here

    OK

    REPLACE PARKING BRAKE WITH BRACKET ACTUATOR ASSEMBLY Click here

  6. CHECK ELECTRIC PARKING BRAKE ECU (TSEN, TSN2, TGND)


    1. Connect the S48 ECU connector.

    2. Connect the S32 actuator connector.

    3. A01GHSQE04

      Measure the voltage between the terminals below.

      Tester Connection Switch Condition
      (A) S48-6 (TSN2) - S48-14 (TGND) Engine switch on (IG)
      (B) S48-8 (TSEN) - S48-14 (TGND) Engine switch on (IG)

      Tech Tips

      Take a note of the measurements.

    4. Turn the engine switch off.

    5. Connect the intelligent tester to the DLC3.

    6. Turn the engine switch on (IG) and the tester ON.

    7. Enter the following menus:

      Select: Chassis / Electric Parking Brake / Data List /

    8. 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 V

      max.: 5 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 V

      max.: 5 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
      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

    CHECK ELECTRIC PARKING BRAKE ECU (DATA LIST) Click here

    A

  7. INSPECT ELECTRIC PARKING BRAKE ECU


    1. Remove the electric parking brake ECU Click here.

    2. A01GHNWE01

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

      Standard resistance
      Tester Connection Condition Specified Condition
      8 (TSEN) - 3 (GND1) Always 4 to 6 kΩ
      6 (TSN2) - 3 (GND1) Always 4 to 6 kΩ
      14 (TGND) - 3 (GND1) Always Below 1 Ω
      10 (SG) - 3 (GND1) Always Below 1 Ω

    NG

    REPLACE ELECTRIC PARKING BRAKE ECU Click here

    OK

    REPLACE PARKING BRAKE WITH BRACKET ACTUATOR ASSEMBLY Click here

  8. CHECK ELECTRIC PARKING BRAKE ECU (DATA LIST)


    1. Turn the engine switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the engine switch on (IG) and the tester ON.

    4. Enter the following menus:

      Select: Chassis / Electric Parking Brake / Data List /

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

      Electric Parking Brake
      Tester Display Measurement Item/Range Switch Condition Normal Condition
      Invalid Tension Sensor Output

      Tension sensor output invalid display/

      ENABLE or DISABLE

      		 Engine switch on (IG) ENABLE
      Invalid Tension Sensor PWR

      Tension sensor power source invalid display/

      ENABLE or DISABLE

      		 Engine switch on (IG) ENABLE
      Invalid Tension Sensor Comp

      Tension sensor comparison invalid display/

      ENABLE or DISABLE

      		 Engine switch on (IG) ENABLE
      +B Voltage Value

      +B power source information display/

      Lo/Mid/Hi

      		 Engine switch on (IG) Hi
      OK
      Values are as shown in normal condition.

    NG

    REPLACE ELECTRIC PARKING BRAKE ECU Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here