ELECTRIC PARKING BRAKE SYSTEM Electric Parking Brake AUTO Indicator Light Circuit

WIRING DIAGRAM

B002KOVE01

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 power 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 power switch is first turned on (IG).

PROCEDURE


  1. READ VALUE USING GTS (AUTO MODE)


    1. Turn the power switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the power 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
      Auto Mode AUTO (shift-linked) mode permission display ON or OFF

      ON: AUTO (shift-linked) mode

      OFF: Manual mode

      Chassis > Electric Parking Brake > 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 > Electric Parking Brake > Trouble Codes
      Result
      Proceed to
      DTC is not output
      DTC is output

    DTC is output

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    DTC is not output

  3. INSPECT ELECTRIC PARKING BRAKE SWITCH (INTEGRATION CONTROL AND PANEL ASSEMBLY)


    1. Remove the electric parking brake switch (integration control and panel assembly).

      Click here

    2. Inspect the electric parking brake switch (integration control and panel assembly).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE INTEGRATION CONTROL AND PANEL ASSEMBLY Click here

    OK

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


    1. Disconnect the I35 electric parking brake switch (integration control and panel assembly) connector.

    2. Disconnect the Q24 parking brake ECU assembly connector.

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

      Standard Resistance
      for LHD:
      Tester Connection Condition Specified Condition
      Q24-20 (LCK1) - I35-9 (LOK1) Always Below 5 Ω
      Q24-15 (LCK2) - I35-10 (LOK2) Always Below 5 Ω
      Q24-20 (LCK1) or I35-9 (LOK1) - Body ground Always 10 kΩ or higher
      Q24-15 (LCK2) or I35-10 (LOK2) - Body ground Always 10 kΩ or higher
      Q24-19 (REL1) - I35-1 (RLS1) Always Below 5 Ω
      Q24-16 (REL2) - I35-2 (RLS2) Always Below 5 Ω
      Q24-19 (REL1) or I35-1 (RLS1) - Body ground Always 10 kΩ or higher
      Q24-16 (REL2) or I35-2 (RLS2) - Body ground Always 10 kΩ or higher
      I35-16 (GND1) - Body ground Always Below 5 Ω
      for RHD:
      Tester Connection Condition Specified Condition
      Q24-20 (LCK1) - I35-16 (LOK1) Always Below 5 Ω
      Q24-15 (LCK2) - I35-15 (LOK2) Always Below 5 Ω
      Q24-20 (LCK1) or I35-16 (LOK1) - Body ground Always 10 kΩ or higher
      Q24-15 (LCK2) or I35-15 (LOK2) - Body ground Always 10 kΩ or higher
      Q24-19 (REL1) - I35-8 (RLS1) Always Below 5 Ω
      Q24-16 (REL2) - I35-7 (RLS2) Always Below 5 Ω
      Q24-19 (REL1) or I35-8 (RLS1) - Body ground Always 10 kΩ or higher
      Q24-16 (REL2) or I35-7 (RLS2) - Body ground Always 10 kΩ or higher
      I35-9 (GND1) - Body ground Always Below 5 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. PERFORM ACTIVE TEST USING GTS (AUTO LIGHT)


    1. Turn the power switch off.

    2. Connect the GTS to the DLC3.

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

    4. Enter the following menus: Chassis / Electric Parking Brake / Active Test.

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


      Chassis > Electric Parking Brake > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Auto Light AUTO indicator light ON or OFF

      • Vehicle stopped

      • Power switch on (IG)

      Chassis > Electric Parking Brake > Active Test
      Tester Display
      Auto Light

    6. When turning the Active Test on and off, check that the AUTO indicator light illuminates and turns off.

      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

    USE SIMULATION METHOD TO CHECK Click here

    A

  6. CHECK HARNESS AND CONNECTOR (AUXILIARY BATTERY - ELECTRIC PARKING BRAKE SWITCH (INTEGRATION CONTROL AND PANEL ASSEMBLY))


    1. Turn the power switch off.

    2. B002H8WC03
      *A for LHD
      *B for RHD
      *a

      Front view of wire harness connector

      (to Electric Parking Brake Switch (Integration Control and Panel Assembly))

      Disconnect the I35 electric parking brake switch (integration control and panel assembly) connector.

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

      Standard Voltage
      for LHD:
      Tester Connection Condition Specified Condition
      I35-4 (IND+) - Body ground Always 11 to 14 V
      for RHD:
      Tester Connection Condition Specified Condition
      I35-5 (IND+) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. CHECK HARNESS AND CONNECTOR (AUXILIARY BATTERY - PARKING BRAKE ECU ASSEMBLY)


    1. Turn the power switch off.

    2. B002JIEC11
      *a

      Front view of wire harness connector

      (to Parking Brake ECU Assembly)

      Disconnect the parking brake ECU assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      Q24-13 (LPA) - Body ground Always 9 to 14 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE PARKING BRAKE ECU ASSEMBLY Click here

    NG

  8. CHECK HARNESS AND CONNECTOR (PARKING BRAKE ECU ASSEMBLY - ELECTRIC PARKING BRAKE SWITCH (INTEGRATION CONTROL AND PANEL ASSEMBLY))


    1. Turn the power switch off.

    2. Disconnect the Q24 parking brake ECU assembly connector.

    3. Disconnect the I35 electric parking brake switch (integration control and panel assembly) connector.

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

      Standard Resistance
      for LHD:
      Tester Connection Condition Specified Condition
      Q24-13 (LPA) - I35-6 (IND-) Always Below 5 Ω
      Q24-13 (LPA) or I35-6 (IND-) - Body ground Always 100 kΩ or higher
      for RHD:
      Tester Connection Condition Specified Condition
      Q24-13 (LPA) - I35-3 (IND-) Always Below 5 Ω
      Q24-13 (LPA) or I35-3 (IND-) - Body ground Always 100 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE INTEGRATION CONTROL AND PANEL ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR