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
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
DTC Detection Conditions
Vehicle Condition
Pattern 1 Pattern 2 Pattern 3 Pattern 4 Pattern 5 Pattern 6
Diagnosis Condition Engine switch on (IG) ○ - ○ - ○ -
When engine switch is off, electric parking brake switch assembly lock control is operating - ○ - ○ - ○
Malfunction Status Tension sensor output value is abnormal ○ ○ - - - -
Difference between output values of 2 tension sensors - - ○ ○ - -
Tension sensor power supply voltage is abnormal - - - - ○ ○
Detection Time Approximately 1 second Approximately 1 second Approximately 1 second Approximately 1 second Approximately 1 second Approximately 1 second
Number of Trips 1 trip 1 trip 1 trip 1 trip 1 trip 1 trip

Tech Tips

DTC will be output when conditions for either of the patterns in the table above are met.

WIRING DIAGRAM

B002CXRE01

CAUTION / NOTICE / HINT

Note


  • 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

  • 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 GTS to the DLC3.

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

    4. Clear the DTC.

      Click here


      Chassis > Electric Parking Brake > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  2. CHECK DTC


    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. Check for DTC.

      Click here


      Chassis > Electric Parking Brake > Trouble Codes
      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 (PARKING BRAKE ECU ASSEMBLY - PARKING BRAKE WITH BRACKET ACTUATOR ASSEMBLY)


    1. Disconnect the U29 and U30 parking brake ECU assembly connectors.

    2. Disconnect the U33 parking brake with bracket actuator assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      U29-3 (GND1) - Body ground Always Below 1 Ω
      U30-8 (TSEN) - U33-5 (TSEN) Always Below 1 Ω
      U30-8 (TSEN) - Body ground Always 10 kΩ or higher
      U30-6 (TSN2) - U33-10 (TSN2) Always Below 1 Ω
      U30-6 (TSN2) - Body ground Always 10 kΩ or higher
      U30-7 (VT) - U33-6 (VT) Always Below 1 Ω
      U30-7 (VT) - Body ground Always 10 kΩ or higher
      U30-14 (TGND) - U33-1 (TGND) Always Below 1 Ω
      U30-14 (TGND) - Body ground Always 10 kΩ or higher
      U30-10 (SG) - U33-2 (SG) Always Below 1 Ω
      U30-10 (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. Connect the parking brake ECU assembly connector.

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

    3. B002D5WC08
      *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
      U30-7 (VT) - U30-14 (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. B002D5WC09
      *a

      Component with harness connected

      (Parking Brake ECU Assembly)

      Measure the voltage between the terminals below.

      Tester Connection Switch Condition
      (A) U30-6 (TSN2) - U30-14 (TGND) Engine switch on (IG)
      (B) U30-8 (TSEN) - U30-14 (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
      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. Remove the parking brake ECU assembly.

      Click here

    2. B002CNOC06
      *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
      U30-8 (TSEN) - U29-3 (GND1) Always 4 to 6 kΩ
      U30-6 (TSN2) - U29-3 (GND1) Always 4 to 6 kΩ
      U30-14 (TGND) - U29-3 (GND1) Always Below 1 Ω
      U30-10 (SG) - U29-3 (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. Disconnect the parking brake with bracket actuator assembly connector.

    2. Turn the engine switch on (IG).

    3. B002EF5C03
      *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
      U33-6 (VT) - U33-1 (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.

      Electric Parking Brake
      Tester Display Measurement Item Range Switch Condition Normal Condition
      +B Voltage Value Electric parking brake motor power source information display Lo, Mid or Hi Engine switch on (IG) Hi
      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
      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