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 in 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 6

Go to Step 7

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

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

Go to Step 18

Go to Step 12

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 necessary:

Did you complete the repair and/or replacement?

Go to Step 9

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1. Remove the rear tire and wheel assemblies. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
2. Have an assistant apply and release the park brake while you observe both of the brake caliper piston apply levers and the rear park brake cables for free and complete motion during both apply and release.

Did the caliper piston apply levers and the rear park brake cables exhibit free and complete motion during both apply and release of the park brake?

Go to Step 10

Go to Step 12

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 11

Go to Step 12

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

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

Go to Step 18

Go to Step 12

1. Disconnect the intermediate park brake cable from the front cable. Refer to Parking Brake Intermediate Cable Replacement .
2. Disconnect the rear park brake cables from the brake caliper piston apply levers. Refer to Parking Brake Rear Cable Replacement - Left Side and Parking Brake Rear Cable Replacement - Right Side .
3. Inspect the intermediate and rear park brake cables for free movement.
4. Apply and release the brake caliper piston apply levers. Observe for the following:

•	Free motion of the piston apply levers during apply and free and complete return to the stops when released

•	Free movement of the caliper pistons during apply and free return movement when released

Do any of the park brake cables checked require replacement?

Go to Step 14

Go to Step 13

Did the brake caliper piston apply levers move freely during apply and freely and completely return to the stops during release; and did the caliper pistons exhibit freedom of movement during apply and release?

Go to Step 20

Go to Step 19

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

Did you complete the replacement?

Go to Step 15

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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 16

Go to Step 17

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

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

Go to Step 18

Go to Step 17

1. Disconnect the intermediate park brake cable from the front cable. Refer to Parking Brake Intermediate Cable Replacement .
2. Disconnect the rear park brake cables from the brake caliper piston apply levers. Refer to Parking Brake Rear Cable Replacement - Left Side and Parking Brake Rear Cable Replacement - Right Side .
3. Have an assistant apply and maintain the caliper piston apply lever to apply the caliper piston.
4. Attempt to rotate the rear wheels to check the rear brakes for a significant amount of drag.
5. Repeat steps 3 and 4 for the other side of the vehicle.
6. Release the caliper piston apply levers.
7. Rotate the rear wheels to check the rear brakes for a significant reduction in the amount of drag.

Did the brake calipers apply and release properly?

Go to Step 18

Go to Step 19

1. Reconnect the intermediate and rear park brake cables if they have been disconnected. Refer to the following procedures:

•	Parking Brake Intermediate Cable Replacement

•	Parking Brake Rear Cable Replacement - Left Side

•	Parking Brake Rear Cable Replacement - Right Side

2. Grasp the intermediate park brake cable and pull downward to check the amount of tension on the park brake cables.

The park brake cables should have a moderate amount of tension.

3. Quickly release the intermediate cable and observe for a quick and complete return of the cable.

Did the park brake cables have a moderate amount of tension and exhibit a quick and complete return?

Go to Step 21

Go to Step 20

Replace the appropriate rear brake caliper. Refer to Rear Brake Caliper Replacement in Disc Brakes.

Did you complete the replacement?

Go to Step 21

--

Replace the park brake pedal assembly. Refer to Parking Brake Lever Pedal Assembly Replacement .

Did you complete the replacement?

Go to Step 21

--

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 in the amount of drag.

Did the park brake apply and release properly?

Go to Step 22

Go to Step 4

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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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 in 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 using the manual override release lever, 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 PARK or NEUTRAL to disable the park brake automatic release system.
2. Apply the park brake.
3. 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 6

Go to Step 7

1. Release the park brake using the manual override release lever.
2. Rotate the rear wheels to check the rear brakes for a significant reduction in the amount of drag.

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

Go to Step 21

Go to Step 11

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 8

Go to Step 9

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 9

--

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

Was the park brake adjusted properly?

Go to Step 11

Go to Step 10

Adjust the park brake. Refer to Park Brake Adjustment .

Were you able to attain adjustment of the park brake?

Go to Step 16

Go to Step 11

1. Disconnect the rear park brake cables from the brake caliper piston apply levers.
2. Apply and release the caliper piston apply levers. Observe for the following:

•	Free motion of the piston apply levers during apply and free and complete return to the stops when released

•	Free movement of the caliper pistons during apply and free return movement when released

Did the brake caliper piston apply levers move freely during apply and freely and completely return to the stops during release; and did the caliper pistons exhibit freedom of movement during apply and release?

Go to Step 13

Go to Step 12

Replace the appropriate rear brake caliper. Refer to Rear Brake Caliper Replacement in Disc Brakes.

Did you complete the replacement?

Go to Step 13

--

Have an assistant apply and manually release the park brake, while you observe the park brake cables for free movement.

Did the park brake cables move freely?

Go to Step 14

Go to Step 17

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

Was the park brake adjusted properly?

Go to Step 16

Go to Step 15

Adjust the park brake. Refer to Park Brake Adjustment .

Were you able to attain adjustment of the park brake?

Go to Step 16

Go to Step 24

1. With the transmission still in PARK or NEUTRAL to disable the park brake automatic release system; 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 using the manual override release lever.
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 29

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 necessary:

Did you complete the replacement?

Go to Step 19

--

1. Disconnect the front park brake cable connection accessible INSIDE the vehicle at the park brake pedal assembly and check for free movement.
2. Replace the front park brake cable if it does not have free movement. Refer to Parking Brake Front Cable Replacement .

Did you find and correct a condition?

Go to Step 22

Go to Step 20

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 23

--

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

Is the park brake adjusted properly?

Go to Step 29

Go to Step 22

Adjust the park brake. Refer to Park Brake Adjustment .

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

Go to Step 25

Go to Step 24

Adjust the park brake. Refer to Park Brake Adjustment .

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

Go to Step 25

Return to Symptom Table

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

Did you complete the replacement and adjustment?

Go to Step 25

Return to Symptom Table

Check the operation of the park brake pedal automatic release system:

1. Apply the park brake.
2. Start the engine and allow it to idle.
3. Shift the transmission into REVERSE or any FORWARD gear.
4. Observe the park brake pedal assembly for automatic release of the pedal.

Did the park brake assembly release automatically?

Go to Step 28

Go to Step 26

1. Disconnect the park brake release actuator rod from the park brake pedal assembly. Leave the ground wire and the electrical connectors connected to the release actuator.
2. Apply the park brake.
3. Start the engine and allow it to idle.
4. Shift the transmission into REVERSE or any FORWARD gear.
5. Observe the operation of the park brake release actuator rod.

Did the park brake release actuator operate properly?

Go to Step 27

Park Brake Pedal Automatic Release System is at Fault

Return to Symptom Table

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 28

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1. With the transmission still in PARK or NEUTRAL to disable the park brake automatic release system; 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 using the manual override release lever.
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 29

Go to Step 4

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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