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Home >> Toyota >> 2024 >> Corolla LE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Electric Parking Brake System (HEV) - Diagnostic Codes, Symptom Tests & Circuit Tests) >> ELECTRIC PARKING BRAKE SYSTEM (for HV Model) >> Electric Parking Brake does not Operate [01/2019 - 09/2022] >> Procedure

Electric Parking Brake does not Operate [01/2019 - 09/2022]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK CAN COMMUNICATION SYSTEM 
    1. Check if CAN communication system DTCs are output.

      Refer to DIAGNOSIS SYSTEM [01/2019 - 04/2020] , or refer to DIAGNOSIS SYSTEM [04/2020 - 09/2022]

      Result

      Result Proceed to
      DTCs are not output A
      DTCs are output B

    Result: 

    B 

    GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [01/2019 - 09/2022] 

    Result: 

    A 

    See step  2

  2. VEHICLE OPERATION CHECK 
    1. When the vehicle's tires are lifted off the ground and the Techstream is used to operate the electric parking brake, check the condition of the rear tires.

      Refer to ON-VEHICLE INSPECTION [01/2019 - 09/2022]

      Result

      Result Proceed to
      Lock and release operation is normal and parking brake indicator light turns off or blinks (red) A
      Lock and release operation is malfunctioning and parking brake indicator light illuminates (red) or turns off according to switch operation B
      Lock and release operation is malfunctioning and parking brake indicator light turns off or blinks (red) C

    Result: 

    B 

    INSPECT REAR BRAKE 

    Result: 

    C 

    See step  5

    Result: 

    A 

    See step  3

  3. PERFORM TECHSTREAM (PARKING BRAKE LIGHT) 
    1. Turn the power switch off.
    2. Connect the Techstream to the DLC3.
    3. Turn the power switch on (IG).
    4. Turn the Techstream on.
    5. Enter the following menus: Chassis / Electric Parking Brake / Active Test.
    6. Perform the Active Test according to the display on the Techstream.

      Chassis > Electric Parking Brake > Active Test 

      Tester Display Measurement Item Control Range Diagnostic Note
      PKB Light Parking brake indicator light (red) ON or OFF
      • Vehicle stopped
      • Power switch on (IG)

      Chassis > Electric Parking Brake > Active Test 

      Tester Display
      PKB Light
    7. Select the Data List on the Techstream.

      Chassis > Electric Parking Brake > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Parking Brake Light Parking brake indicator light (red) output signal OFF, Light or Blink OFF: Parking brake indicator light (red) turns off
      Light: Parking brake indicator light (red) illuminates
      Blink: Parking brake indicator light (red) flashes      		 -

      Chassis > Electric Parking Brake > Data List 

      Tester Display
      Parking Brake Light
    8. Check the operating condition of the parking brake indicator light (red) when operating it using the Techstream.

      Result

      Result Proceed to
      The value of the Data List item does not change in accordance with the Active Test A
      The value of the Data List item changes in accordance with the Active Test B

    Result: 

    A 

    REPLACE PARKING BRAKE ECU (BRAKE ACTUATOR ASSEMBLY). Refer to  REMOVAL [01/2019 - 09/2022] 

    Result: 

    B 

    See step  4

  4. INSPECT COMBINATION METER ASSEMBLY 
    1. Perform the Active Test of the combination meter assembly using the Techstream.

      Body Electrical > Combination Meter > Active Test 

      Tester Display
      Indicat. Park
    2. Check the combination meter assembly.

      OK

      Parking brake indicator light (red) turns on or off in accordance with Techstream operation.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE PARKING BRAKE ECU (BRAKE ACTUATOR ASSEMBLY). Refer to  REMOVAL [01/2019 - 09/2022] 

    Result: 

    NG 

    GO TO METER / GAUGE SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [01/2019 - 09/2022] 

  5. CHECK HARNESS AND CONNECTOR (BEPB CIRCUIT) 
    1. Turn the power switch off.
    2. Disconnect the A113 parking brake ECU (brake actuator assembly) connector.
    3. Measure the voltage according to the value(s) in the table below.
      GTY855291Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Parking Brake ECU (Brake Actuator Assembly))

      Standard Voltage

      Tester Connection Condition Specified Condition
      A113-9 (BEPB) - Body ground Power switch off 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  6

  6. CHECK HARNESS AND CONNECTOR (AUXILIARY BATTERY - PARKING BRAKE ECU (BRAKE ACTUATOR ASSEMBLY)) 
    1. Turn the power switch off.
    2. Disconnect the A113 parking brake ECU (brake actuator assembly) connector.
    3. Measure the voltage according to the value(s) in the table below.
      GTY855289Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Parking Brake ECU (Brake Actuator Assembly))

      Standard Voltage

      Tester Connection Condition Specified Condition
      A113-26 (IG) - Body ground Power switch on (IG) 8 to 16 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE PARKING BRAKE ECU (BRAKE ACTUATOR ASSEMBLY). Refer to  REMOVAL [01/2019 - 09/2022] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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