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Park Brake System Diagnosis

Step Action Yes No
DEFINITION: This diagnostic table is designed to diagnose ONLY the mechanical 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.
1 Were you sent here from a Hydraulic Brake Symptom table? Go to Step 4  Go to Step 2 
2 Were you sent here from a Park Brake Symptom table? Go to Step 4  Go to Step 3 
3
  1. Raise and support the vehicle with the rear axle supported by jack stands. Refer to Lifting and Jacking the Vehicle .
  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 7  Go to Step 4 
4
  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 12  Go to Step 5 
5 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 6  Go to Step 7 
6 Reconnect or replace the park brake cables as necessary. Refer to Parking Brake Rear Cable Replacement .
Did you complete the repair and/or replacement?		 Go to Step 12   
7
  1. Disconnect the rear park brake cables from the equalizer and from the brake caliper piston apply levers. Refer to Parking Brake Rear Cable Replacement .
  2. Have an assistant apply and maintain the caliper piston apply lever to apply the caliper piston.
  3. Attempt to rotate the rear wheels to check the rear brakes for a significant amount of drag.
  4. Release the caliper piston apply lever.
  5. Repeat steps 2-4 for the opposite caliper piston apply lever.
  6. Rotate the rear wheels to check the brake for a significant reduction of drag.
Did the brake calipers apply and release properly?		 Go to Step 9  Go to Step 8 
8 Replace the appropriate rear brake caliper. Refer to Rear Brake Caliper Replacement .
Did you complete the replacement?		 Go to Step 12   
9 With the aid of an assistant, apply and release the parking brake while observing the cables for free movement.
Did the park brake cables move freely?		 Go to Step 11  Go to Step 10 
10 Replace any of the park brake cables inspected that do not have free movement. Refer to Parking Brake Rear Cable Replacement .
Did you complete the replacement?		 Go to Step 12   
11 Inspect the electronic parking brake control module for proper operation and replace if necessary. Refer to Electronic Parking Brake Control Module Replacement .
Did you complete the replacement?		 Go to Step 12   
12 Install or connect any components that were removed or disconnected during diagnosis.
Did you complete the operation?		 Park Brake System OK  
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