Park Brake System Diagnosis
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Park Brake System Diagnosis
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Step
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Action
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Yes
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No
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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.
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1
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Were you sent here from a Hydraulic Brake Symptom table?
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Go to
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Go to
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2
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Were you sent here from a Park Brake Symptom table?
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Go to
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Go to
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3
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Is the symptom related to the ability of the park brake system to hold and/or release?
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Go to
Symptoms - Park Brake
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Go to
Symptoms - Hydraulic Brakes
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4
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2.
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With the park brake RELEASED, attempt to rotate the rear wheels to check the rear brakes for a significant amount of drag.
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Do the rear brakes have a significant amount of drag?
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Go to
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Go to
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5
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2.
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Attempt to rotate the rear wheels to check the rear brakes for a significant amount of drag.
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Do the rear brakes have a significant amount of drag?
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Go to
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Go to
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6
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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?
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Go to
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Go to
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7
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Reconnect or replace the park brake cables as necessary. Refer to
Parking Brake Rear Cable Replacement (J71)
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Did you complete the repair and/or replacement?
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Go to
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-
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8
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2.
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Have an assistant apply and maintain the caliper piston apply lever to apply the caliper piston.
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3.
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Attempt to rotate the rear wheels to check the rear brakes for a significant amount of drag.
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4.
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Release the caliper piston apply lever.
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5.
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Repeat steps 2, 3, and 4 for the other side of the vehicle.
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6.
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Rotate the rear wheels to check the brake for a significant reduction of drag.
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Did the brake calipers apply and release properly?
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Go to
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Go to
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9
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Replace the appropriate rear brake caliper. Refer to
Rear Brake Caliper Replacement (J60)
Rear Brake Caliper Replacement (J61, J62)
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Did you complete the replacement?
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Go to
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-
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10
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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?
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Go to
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Go to
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11
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Replace any of the park brake cables inspected that do not have free movement. Refer to
Parking Brake Rear Cable Replacement (J71)
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Did you complete the replacement?
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Go to
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-
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12
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Install or connect any components that were removed or disconnected during diagnosis.
Did you complete the procedure?
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Park Brake System OK
Go to
Symptoms - Park Brake
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-
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