Step
|
Action
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Yes
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No
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DEFINITION: Brake system does not fully release or has delayed
release; vehicle motion may be hindered by brake system without
applying brakes.
|
1
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Were you sent here from the Hydraulic Brake Symptom table?
|
Go to Step 2
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-
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2
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Is the vehicle equipped with an adjustable stop lamp switch and/or
an adjustable cruise control release switch?
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Go to Step 3
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-
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3
|
|
1. |
Inspect the stop lamp switch for proper adjustment
to ensure that the brake pedal is fully releasing. |
|
2. |
Inspect the cruise control release switch, if
equipped, for proper adjustment to ensure that the brake pedal is
fully releasing. |
Did you find and correct a condition?
|
Go to Step 9
|
-
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4
|
|
1. |
Clean and inspect the park brake shoes for
excessive wear and/or damage. |
|
2. |
If any of these conditions are present, replace
the affected components. |
|
3. |
Adjust the park brake system. |
Did you find and correct a condition?
|
Go to Step 12
|
Go to Step 5
|
5
|
Inspect the park brake system for proper operation. Refer to
Park Brake System Diagnosis .
Did you find and correct a condition?
|
Go to Step 12
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Go to Step 6
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6
|
|
1. |
Inspect the disc brake system for the following
conditions: |
| • |
Binding, incorrectly installed or missing caliper
hardware and/or lining hardware-ensure free movement of linings and
of caliper, if equipped with sliding type caliper. |
| • |
Lack of lubrication or excessive corrosion on
metal to metal contact surfaces |
| • |
Distorted or damaged linings |
| • |
Damaged or excessively worn caliper hardware
and/or lining hardware |
| • |
Bent or damaged caliper or mounting component |
Did you find and correct a condition?
|
Go to Step 12
|
Go to Step 7
|
7
|
|
1. |
Separate the brake booster pushrod from the brake
pedal. |
|
2. |
Inspect the brake corners to determine if the
brake drag condition is still present. |
Do the brake corners still exhibit the brake drag condition?
|
Go to Step 9
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Go to Step 8
|
8
|
|
1. |
Inspect the pushrod for improper positioning
and/or damage. Correctly position or replace the pushrod if
necessary. |
|
2. |
Inspect the brake pedal assembly for damage and
replace if necessary. |
Did you complete the repair or replacement?
|
Go to Step 12
|
-
|
9
|
|
1. |
For vacuum boost systems, disconnect the vacuum
check valve from the booster to relieve vacuum reserve. |
|
2. |
Separate the master cylinder from the brake
booster. Do not disconnect any brake pipes. |
|
3. |
Inspect the brake corners to determine if the
brake drag condition is still present. |
Do the brake corners still exhibit the brake drag condition?
|
Go to Step 11
|
Go to Step 10
|
10
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Replace the brake booster assembly.
Did you complete the replacement?
|
Go to Step 12
|
-
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11
|
|
1. |
Inspect the hydraulic brake system for the
following conditions: |
| • |
Improper operation of wheel cylinder pistons, if
equipped |
| • |
Improper operation of caliper pistons |
| • |
Contaminated brake fluid |
| • |
Internally damaged flexible brake hoses; hindering
brake release |
| • |
Damaged or improperly operating master
cylinder |
Did you find and correct a condition?
|
Go to Step 12
|
-
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12
|
|
1. |
Install or connect components that were removed or
disconnected during diagnosis. |
Is the condition still present?
|
Go to Step 2
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System OK
|
