DEFINITION: This diagnostic table is designed to diagnose ONLY the components of the PARK brake system in order to determine if the PARK brake system is operating properly. You will be directed by the appropriate Symptom table to go to other brake system diagnostic tables as appropriate.

Were you sent here from a Hydraulic Brake Symptom table?

Go to Step 4

Go to Step 2

Were you sent here from a Park Brake Symptom table?

Go to Step 4

Go to Step 3

Is the symptom related to the ability of the park brake system to hold and/or release?

Go to Diagnostic Starting Point - Park Brake

Go to Diagnostic Starting Point - Hydraulic Brakes

1. Raise and support the vehicle with the rear axle supported by jack stands. Refer to Lifting and Jacking the Vehicle in General Information.
2. With the park brake RELEASED, attempt to rotate the rear wheels to check the rear brakes for a significant amount of drag.

Do the rear brakes have a significant amount of drag?

Go to Step 9

Go to Step 5

1. Apply the park brake.
2. Attempt to rotate the rear wheels to check the rear brakes for a significant amount of drag.

Do the rear brakes have a significant amount of drag?

Go to Step 18

Go to Step 7

Visually check the park brake cable connections and the cables that are accessible on the UNDERSIDE of the vehicle for disconnections and/or damage.

Were any or the park brake cables disconnected and/or damaged?

Go to Step 7

Go to Step 8

Reconnect or replace the park brake cables as necessary. Refer to the following procedures as necessary:

Did you complete the repair and/or replacement?

Go to Step 18

--

Check the adjustment of the park brake. Refer to Park Brake Adjustment .

Did you find and correct the condition?

Go to Step 18

Go to Step 9

Notice: Do not depress the brake pedal with the brake rotors and/or the brake drums removed, or with the brake calipers repositioned away from the brake rotors, or damage to the brake system may result.

1. Remove the brake drums. Refer to Brake Drum Replacement in Drum Brakes.
2. Inspect the park brake hardware for loose, damaged, broken or missing components. Refer to Park Brake Hardware Inspection .
3. Check the drum brake adjusters for a seized condition.

Does the park brake hardware and/or the park brake adjusters require replacement?

Go to Step 10

Go to Step 11

1. Replace park brake hardware components as necessary. Refer to Brake Shoe Replacement in Drum Brakes.
2. Replace the drum brake adjusting hardware as necessary. Refer to Drum Brake Adjusting Hardware Replacement in Drum Brakes.

Did you complete the replacement?

Go to Step 18

--

With the aid of an assistant, apply and release the parking brake while observing the cables for free movement

Do the park brake cables move freely?

Go to Step 12

Go to Step 14

Check the adjustment of the park brake and adjust if necessary. Refer to Park Brake Adjustment .

Did you find and correct the condition?

Go to Step 18

Go to Step 13

1. Apply the park brake.
2. Attempt to rotate the rear wheels to check the rear brakes for a significant amount of drag.
3. Release the park brake.
4. Rotate the rear wheels to check the rear brakes for a significant reduction of drag.

Did the park brake apply and release properly?

Go to Step 18

Go to Symptoms - Park Brake

Replace any of the park brake cables that do not have free movement - not releasing properly. Refer to the following procedures as necessary:

Did you complete the replacement?

Go to Step 18

--

Inspect the park brake lever for proper operation and replace if necessary. Refer to Parking Brake Lever Replacement .

Did you complete the replacement?

Go to Step 18

Go to Step 16

Check the adjustment of the park brake. Refer to Park Brake Adjustment .

Did you find and correct the condition?

Go to Step 18

Go to Step 17

1. Replace the component that is used to adjust the park brake system. Refer to Parking Brake Lever Replacement .
2. Adjust the park brake. Refer to Park Brake Adjustment .

Did you complete the replacement and adjustment?

Go to Step 18

Go to Symptoms - Park Brake

Install or connect any components that were removed or disconnected during diagnosis.

Did you complete the operation?

Park Brake System OK

Go to Symptoms - Park Brake