BrakesPark Brake System Diagnosis - Disc Brakes
Park Brake System Diagnosis
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 Step 4
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Go to Step 2
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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 Step 4
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Go to Step 3
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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. |
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?
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Go to Step 8
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Go to Step 5
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5
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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?
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Go to Step 13
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Go to Step 6
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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 Step 7
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Go to Step 8
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7
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Reconnect or replace the park brake cables as necessary. Refer to
Parking Brake Cable Replacement .
Did you complete the repair and/or replacement?
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Go to Step 13
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-
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8
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2. |
Have an assistant apply and maintain the caliper
piston apply lever to apply the caliper piston. |
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3. |
Attempt to rotate the rear wheels to check the
rear brakes for a significant amount of drag. |
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4. |
Release the caliper piston apply lever. |
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5. |
Repeat steps 2, 3, and 4 for the other side of the
vehicle. |
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6. |
Rotate the rear wheels to check the brake for a
significant reduction of drag. |
Did the brake calipers apply and release properly?
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Go to Step 10
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Go to Step 9
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9
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Replace the appropriate rear brake caliper. Refer to
Rear Brake Caliper Replacement .
Did you complete the replacement?
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Go to Step 13
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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 Step 12
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Go to Step 11
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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 Cable Replacement .
Did you complete the replacement?
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Go to Step 13
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-
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12
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Inspect the park brake pedal assembly for proper operation and
replace if necessary. Refer to
Parking Brake Lever Replacement .
Did you complete the replacement?
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Go to Step 13
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-
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13
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Install or connect any components that were removed or
disconnected during diagnosis.
Did you complete the operation?
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Park Brake System OK
Go to
Symptoms - Park Brake
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-
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07 Brakes
