my Volvo XC90's parking brake won't release what's going on

Solution

1. Preparation

• Gather tools: OBD-II scanner, socket set, multimeter, and wrenches.
• Ensure the vehicle is parked on a level surface and the ignition is turned off.

2. Inspect and Test the Parking Brake Switch

• Remove the center console cover to access the parking brake switch.
• Disconnect the switch connector and use a multimeter to check for continuity while pressing the switch.
• If the switch is faulty, replace it with a new one.

3. Examine the Parking Brake Cables

• Lift the rear of the vehicle using a jack and secure it with jack stands.
• Visually inspect the parking brake cables for any fraying or disconnection.
• If damaged, replace the defective cable with a new one, ensuring proper routing and tension.

4. Test the Parking Brake Actuator

• Locate the parking brake actuator under the vehicle.
• Disconnect the actuator electrical connector and check for voltage using a multimeter when the parking brake is engaged or disengaged.
• If there is no voltage or the actuator is not operating, replace it.

5. Check and Adjust the Brake Assembly

• Remove the rear wheel to access the brake assembly.
• Inspect the brake shoes and drum for wear and binding.
• If necessary, adjust the brake shoes to ensure they are not dragging on the drum or replace them if worn.