ELECTRIC PARKING BRAKE SYSTEM Electric Parking Brake AUTO Indicator Light Circuit

WIRING DIAGRAM

A01VXHKE14

CAUTION / NOTICE / HINT

Note


  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

  • 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. READ VALUE USING GTS (AUTO MODE)


    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 > ABS/VSC/TRC/EPB > Data List
      Tester Display Measurement Item Range Diagnostic Note
      Auto Mode AUTO (shift-linked) mode permission display ON or OFF

      ON: AUTO (shift-linked) mode

      OFF: Manual mode

      Chassis > ABS/VSC/TRC/EPB > Data List
      Tester Display
      Auto Mode

    6. When switching the mode, check that the Data List display turns on and off.

      Tech Tips

      For details regarding mode switching: Click here

      Result
      Result Proceed to
      AUTO indicator light does not illuminate and turn off according to turning Active Test on and off A
      AUTO indicator light illuminates and turns off according to turning Active Test on and off B

    B

    GO TO STEP 5 Click here

    A

  2. CHECK DTC


    1. Check for DTCs.

      Click here


      Chassis > ABS/VSC/TRC/EPB > Trouble Codes
      Result
      Result Proceed to
      DTC is not output A
      DTC is output B

    B

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    A

  3. INSPECT ELECTRIC PARKING BRAKE SWITCH ASSEMBLY


    1. Remove the electric parking brake switch assembly.

      Click here

    2. Inspect the electric parking brake switch assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE ELECTRIC PARKING BRAKE SWITCH ASSEMBLY Click here

    OK

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


    1. Disconnect the J85 electric parking brake switch assembly connector.

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

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

      Standard Resistance
      for LHD:
      Tester Connection Condition Specified Condition
      A41-36 (LCK1) - J85-9 (LOK1) Always Below 5 Ω
      A41-23 (LCK2) - J85-10 (LOK2) Always Below 5 Ω
      A41-36 (LCK1) or J85-9 (LOK1) - Body ground Always 10 kΩ or higher
      A41-23 (LCK2) or J85-10 (LOK2) - Body ground Always 10 kΩ or higher
      A41-31 (REL1) - J85-1 (RLS1) Always Below 5 Ω
      A41-39 (REL2) - J85-2 (RLS2) Always Below 5 Ω
      A41-31 (REL1) or J85-1 (RLS1) - Body ground Always 10 kΩ or higher
      A41-39 (REL2) or J85-2 (RLS2) - Body ground Always 10 kΩ or higher
      J85-16 (GND1) - Body ground Always Below 5 Ω
      for RHD:
      Tester Connection Condition Specified Condition
      A41-36 (LCK1) - J85-16 (LOK1) Always Below 5 Ω
      A41-23 (LCK2) - J85-15 (LOK2) Always Below 5 Ω
      A41-36 (LCK1) or J85-16 (LOK1) - Body ground Always 10 kΩ or higher
      A41-23 (LCK2) or J85-15 (LOK2) - Body ground Always 10 kΩ or higher
      A41-31 (REL1) - J85-8 (RLS1) Always Below 5 Ω
      A41-39 (REL2) - J85-7 (RLS2) Always Below 5 Ω
      A41-31 (REL1) or J85-8 (RLS1) - Body ground Always 10 kΩ or higher
      A41-39 (REL2) or J85-7 (RLS2) - Body ground Always 10 kΩ or higher
      J85-9 (GND1) - Body ground Always Below 5 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (BATTERY - ELECTRIC PARKING BRAKE SWITCH ASSEMBLY)


    1. Turn the engine switch off.

    2. A01VX53C04
      *A for LHD
      *B for RHD
      *a

      Front view of wire harness connector

      (to Electric Parking Brake Switch Assembly)

      Disconnect the J85 electric parking brake switch assembly connector.

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

      Standard Voltage
      for LHD:
      Tester Connection Condition Specified Condition
      J85-4 (IND+) - Body ground Always 11 to 14 V
      for RHD:
      Tester Connection Condition Specified Condition
      J85-5 (IND+) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK HARNESS AND CONNECTOR (BATTERY - SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY))


    1. Turn the engine switch off.

    2. B005MOKC12
      *a

      Front view of wire harness connector

      (to Skid Control ECU (Brake Actuator Assembly))

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

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A41-40 (LPA) - Body ground Always 9 to 14 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) Click here

    NG

  7. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) - ELECTRIC PARKING BRAKE SWITCH ASSEMBLY)


    1. Turn the engine switch off.

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

    3. Disconnect the J85 electric parking brake switch assembly connector.

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

      Standard Resistance
      for LHD:
      Tester Connection Condition Specified Condition
      A41-40 (LPA) - J85-6 (IND-) Always Below 5 Ω
      A41-40 (LPA) or J85-6 (IND-) - Body ground Always 100 kΩ or higher
      for RHD:
      Tester Connection Condition Specified Condition
      A41-40 (LPA) - J85-3 (IND-) Always Below 5 Ω
      A41-40 (LPA) or J85-3 (IND-) - Body ground Always 100 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ELECTRIC PARKING BRAKE SWITCH ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR