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Home >> Mazda >> 2021 >> CX-30 Turbo Premium >> Repair and Diagnosis >> External Pages >> Different car >> Section 100 (Parking Brake System) >> Electric Parking Brake Forced Release Procedure

Electric Parking Brake Forced Release Procedure

WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.

Replacement Part 

Bolt
Quantity: 2
Location of use: Electric parking brake motor gear unit		 O-ring
Quantity: 1
Location of use: Electric parking brake motor gear unit		 Electric parking brake motor gear unit
Quantity: 1
Location of use: Rear brake caliper

Oil and Chemical Type 

Brake grease (White)
Type: SYNTHESO GLEP1
CAUTION:
  • Perform the electric parking brake forced release if the electric parking brake cannot be released by operating the electric parking brake switch or performing a recovery operation using the ignition switch due to a malfunction in the system or a discharged battery.
  • Perform a DTC inspection before performing the electric parking brake forced release, and perform the procedure after verifying the malfunctioning location. (See DTC INSPECTION .)
  • If the electric parking brake was forced-released, do not reuse the electric parking brake motor gear unit. Always install a new electric parking brake motor gear unit.
  • When performing the procedure while the vehicle is on the ground, block the front and rear wheels using wheel blocks. Otherwise, the vehicle may move when the electric parking brake is released.
NOTE:
  • The clearance between the disc plate and disc pads is expanded after an electric parking brake forced release, therefore operation of the electric parking brake motor gear unit when the electric parking brake switch is initially operated after the servicing may take longer than normal.
  1. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .)
  2. Remove the wheel and tire. (See WHEEL AND TIRE REMOVAL/INSTALLATION .)
  3. Disconnect the electric parking brake motor gear unit connector. (See ELECTRIC PARKING BRAKE MOTOR GEAR UNIT REMOVAL/INSTALLATION .)
    WARNING:
    • When removing the bolts, always support the electric parking brake motor gear unit so that a hand does not get caught. Otherwise, it could rotate by the motor counter force and a hand could get caught causing injury.
  4. Remove the bolts.
    G13176243Courtesy of MAZDA MOTORS CORP.
    CAUTION:
    • Wrap a cloth on the end of a flat head screwdriver to prevent damaging the caliper body.
    • Do not insert a flat head screwdriver into the location shown in the illustration.
    G13558362Courtesy of MAZDA MOTORS CORP.
  5. Insert a flat head screwdriver into the location shown in the illustration and press out the electric parking brake motor gear unit.
    G13558363Courtesy of MAZDA MOTORS CORP.
  6. Insert a flat head screwdriver into the location shown in the illustration, and support the electric parking brake motor gear unit with a hand.
    G13558364Courtesy of MAZDA MOTORS CORP.
  7. Remove the electric parking brake motor gear unit and O-ring.
    G13558365Courtesy of MAZDA MOTORS CORP.
  8. Rotate the spindle approx. 1 time in the direction of the arrow shown in the illustration.
    G13558366Courtesy of MAZDA MOTORS CORP.
  9. Rotate the disc plate and verify if the electric parking brake has been released.
    • If the electric parking brake has not been released, rotate the spindle approx. 1 time in the same direction shown in Step 8 and verify if the electric parking brake has been released.
  10. Install the O-ring and electric parking brake motor gear unit.
    Fig 1: O-Ring And Electric Parking Brake Motor Gear Unit With Torque Specification
    G13558367Courtesy of MAZDA MOTORS CORP.
  11. Connect the electric parking brake motor gear unit connector. (See ELECTRIC PARKING BRAKE MOTOR GEAR UNIT REMOVAL/INSTALLATION .)
  12. Install the wheel and tire. (See WHEEL AND TIRE REMOVAL/INSTALLATION .)
  13. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .)
  14. Operate the electric parking brake switch using the following procedure to verify the operation of the electric parking brake and perform the automatic adjustment.
    1. Switch the ignition ON (engine off).
    2. Operate the electric parking brake.
      • If the electric parking brake cannot be operated, release it once and then try to re-operate it.
        • If the electric parking brake cannot be operated/released, perform a DTC inspection as a malfunction of the electric parking brake may have occurred. (See DTC INSPECTION .)
    3. Verify that the electric parking brake indicator light turns on and the brake control system warning light turns off.
      • If the electric parking brake indicator light does not turn on, the electric parking brake indicator light flashes, or the brake control system warning light does not turn off, perform a DTC inspection as a malfunction of the electric parking brake may have occurred. (See DTC INSPECTION .)
    4. Release the electric parking brake.
    5. Verify that the electric parking brake indicator light and the brake control system warning light turn off.
    • If the electric parking brake indicator light and the brake control system warning light do not turn off, perform a DTC inspection as a malfunction of the electric parking brake may have occurred. (See DTC INSPECTION .)
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