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.
2. Shift the transmission into NEUTRAL.
3. 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 11

Go to Step 5

1. Shift the transmission into NEUTRAL.
2. Set the parking brake.
3. 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 6

Go to Step 7

1. Release the park brake.
2. Rotate the rear wheels to check the rear brakes for a significant reduction of drag.

Did the rear brakes exhibit a significant reduction in the amount of drag?

Go to Step 20

Go to Step 11

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

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

Go to Step 8

Go to Step 9

Reconnect or replace the park brake cables. As necessary, refer to the following procedures as required:

Did you complete the repair and/or replacement?

Go to Step 9

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Check the park brake adjustment. Refer to Parking Brake Adjustment.

Is the park brake adjusted properly?

Go to Step 11

Go to Step 10

Adjust the park brake. Refer to Parking Brake Adjustment.

Were you able to attain adjustment of the park brake?

Go to Step 16

Go to Step 11

Caution: 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 rear brake rotor. Refer to Rear Brake Rotor Replacement.
2. Inspect the park brake shoe hardware for looseness, damaged, broken, or missing components.
3. Inspect the park brake actuators for a seized condition.

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

Go to Step 12

Go to Step 13

1. Replace park brake hardware components as necessary. Refer to Parking Brake Shoe Replacement.
2. Replace the park brake actuators as necessary. Refer to Parking Brake Actuator Replacement.

Did you complete the replacement?

Go to Step 13

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Have an assistant apply and release the park brake while observing the park brake cables for free movement.

Do the park brake cables move freely?

Go to Step 14

Go to Step 17

Check the park brake adjustment. Refer to Parking Brake Adjustment.

Is the park brake adjusted properly?

Go to Step 14

Go to Step 17

Adjust the park brake. Refer to Parking Brake Adjustment

Were you able to attain adjustment of the park brake?

Go to Step 16

Go to Step 25

1. With the transmission still in NEUTRAL, apply the park brake.
2. 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 27

Return to Symptom Table

Disconnect the park brake cable connections that are accessible on the UNDERSIDE of the vehicle one at a time and check each cable for free movement.

Do any of the park brake cables accessible on the underside of the vehicle require replacement?

Go to Step 18

Go to Step 19

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

Did you complete the replacement?

Go to Step 19

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Replace the park brake pedal assembly (not releasing properly). Refer to Parking Brake Lever Pedal Assembly Replacement.

Did you complete the replacement?

Go to Step 24

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Check the park brake adjustment. Refer to Parking Brake Adjustment.

Is the park brake adjusted properly?

Go to Step 27

Go to Step 21

Adjust the park brake. Refer to Parking Brake Adjustment

Go to Step 26

Go to Step 22

1. Remove the rear brake rotors, if they have not yet been removed. Refer to Rear Brake Rotor Replacement.
2. Inspect the park brake actuators for a seized condition.
3. Replace the park brake actuators as necessary. Refer to Parking Brake Actuator Replacement

Did you find and correct the condition?

Go to Step 23

Go to Step 25

Adjust the park brake. Refer to Parking Brake Adjustment.

Were you able to attain adjustment of the park brake system?

Go to Step 26

Go to Step 25

Adjust the park brake. Refer to Parking Brake Adjustment

Go to Step 26

Return to Symptom Table

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

Did you complete the replacement and adjustment?

Go to Step 26

Return to Symptom Table

1. With the transmission still in NEUTRAL, apply the park brake.
2. 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 27

Return to Symptom Table

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

Did you complete the operation?

Park Brake System OK

Return to Symptom Table

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