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Electric Parking Brake System: Initialization

NOTE: If the electric parking brake ECU or electric parking brake actuator is replaced, perform the "Reset Memory" and "ACQUIRE TENSION SENSOR ZERO POINT" procedures.
  1. RESET MEMORY (with Techstream) 
    1. Turn the engine switch off.
    2. Connect the Techstream to the DLC3.
    3. Turn the engine switch on (IG) and the Techstream on.
    4. Enter the following menus: Chassis / Electric Parking Brake / Utility / Reset Memory.
    5. Follow the Techstream display and perform reset memory.

    HINT:

    When the reset memory is completed, the parking brake indicator light (RED) will blink at 0.5 second intervals.

  2. RESET MEMORY (without Techstream) 
    1. Turn the engine switch off.
      Fig 1: Identifying Parking Brake Indicator Light (RED)
      G04949962Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3.

      SST 09843-18040 

      NOTE: Do not connect the wrong terminals, as this will cause parts to be damaged.
    3. Turn the engine switch on (IG).

      HINT:

      The parking brake indicator light (RED) will blink at 0.25 second intervals.

      Fig 2: Identifying DLC3 Connector Terminal
      G04944121Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Perform both of the following procedures within 8 seconds:
      1. Perform the following with the electric parking brake switch twice: lock condition → off → release condition → off.
      2. Perform the following with the brake pedal: depress → release → depress → release.
        3. Fig 3: Identifying Blinking Pattern Of Brake Pedal
        G04949964Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. With the engine switch on (IG), disconnect the connection of terminals 13 (TC) and 4 (CG) of the DLC3.
    6. Check that the parking brake indicator light (RED) blinks at 0.5 second intervals.
    NOTE: If terminal 13 (TC) and 4 (CG) of the DLC3 are not disconnected, the blinking pattern (0.5 second intervals) cannot be checked.

    HINT:

    If the parking brake indicator light (RED) blinking pattern (0.5 second intervals) is confirmed, the clear procedure is completed. If not confirmed, repeat the procedures above.

  3. ACQUIRE TENSION SENSOR ZERO POINT 
    1. After performing reset memory, perform the release control. Check that the parking brake indicator light (RED) turns off.
  4. PARKING BRAKE BEDDING 
    CAUTION: Performing parking brake bedding forms the friction surfaces of the parking brake shoe and rear disc, which creates the basic braking force of the parking brake. If bedding is not performed, the parking brake performance may not be normal.
    NOTE: If one of the following is performed, perform parking brake bedding.
    • Rear disc is replaced or removed and installed
    • Parking brake shoe is replaced or removed and installed
    • electric parking brake actuator is replaced or removed and installed
    1. Turn the engine switch off.
    2. Using SST, connect terminals 12 (TS) and 4 (CG) of the DLC3.

      SST 09843-18040 

      NOTE: Do not connect the wrong terminals, as this will cause parts to be damaged.
      Fig 4: Identifying DLC3 Connector Terminal
      G04944107Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Turn the engine switch on (IG).
    4. Perform the following procedures with the electric parking brake switch within 8 seconds:
      1. Turning the lock switch ON and OFF 3 times.
      2. Turn the release switch ON and OFF 3 times.
      Fig 5: Identifying Blinking Pattern Of Lock Switch And Release Switch
      G04949966Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Check that the system is in test mode.

      HINT:

      The multi-information display shows "EPB TEST". EPB stands for electric parking brake. If it is not displayed, repeat the procedures above.

    6. Perform parking brake bedding.
    7. Drive the vehicle at 30 km/h (19 mph).
    8. Push the parking brake switch to the lock side for 5 seconds.
      NOTE:
      • The braking power is generated from the parking brake while driving the vehicle. This will cause the vehicle speed to decrease. Depress the acceleration pedal to maintain the speed at 30 km/h (19 mph).
      • This procedure must be performed while driving the vehicle. If performed on a speed tester, etc., the front wheels do not rotate and the vehicle will determine that the vehicle is stopped.
      Fig 6: Identifying Parking Brake Indicator Light (RED)
      G05848436Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      • The parking brake indicator light (RED) stops blinking at 0.125 second intervals, and illuminates.
      • The buzzer turns ON (peeping sound).
      • The tension is automatically adjusted.
    9. After 5 seconds, check that the buzzer and the parking brake indicator light (RED) turn off.

      HINT:

      The brake force decreases.

    10. Release the parking brake lock switch.
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