DEFINITION: Brake system does not fully release or has delayed release; vehicle motion may be hindered by brake system without applying brakes.

Were you sent here from the Hydraulic Brake Symptom table?

Go to Step 2

Go to Symptoms - Hydraulic Brakes

Is the vehicle equipped with an adjustable stop lamp switch and/or an adjustable cruise control release switch?

Go to Step 3

Go to Step 4

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 14

Go to Step 4

Is the vehicle equipped with a drum-in-disc type of hand brake system?

Go to Step 5

Go to Step 7

Ensure the hand brake shoes are not adjusted too tightly, possibly causing drag under certain conditions.

Are the hand brake shoes adjusted too tightly?

Go to Step 6

Go to Step 7

1. Clean and inspect the hand brake shoes for excessive wear and/or damage.
2. Inspect the drum portion of the discs for excessive wear, blueing discolouration and heat spots.
3. If any of these conditions are present, replace the affected components.
4. Adjust the hand brake system.

Did you find and correct a condition?

Go to Step 14

Go to Step 7

Inspect the hand brake system for proper operation. Refer to Hand brake System Diagnosis .

Did you find and correct a condition?

Go to Step 14

Go to Step 8

1. Inspect the disc brake system for the following conditions:

•	Binding, incorrectly installed or missing calliper hardware and/or lining hardware--Ensure free movement of linings and of calliper, if equipped with sliding type calliper

•	Lack of lubrication or excessive corrosion on metal to metal contact surfaces

•	Distorted or damaged linings

•	Damaged or excessively worn calliper hardware and/or lining hardware

•	Bent or damaged calliper or mounting component

2. Adjust, repair or replace components as necessary. Refer to Disc Brake System Diagnosis .

Did you find and correct a condition?

Go to Step 14

Go to Step 9

1. Separate the brake 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 11

Go to Step 10

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 14

--

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 13

Go to Step 12

Replace the master cylinder assembly.

Did you complete the replacement?

Go to Step 14

--

1. Inspect the hydraulic brake system for the following conditions.

•	Improper operation of calliper pistons

•	Contaminated brake fluid

•	Internally damaged flexible brake hoses; hindering brake release

•	Damaged or improperly operating master cylinder

2. Adjust, repair or replace components as necessary. Refer to Brake Hydraulic and Assist System Diagnosis .

Did you find and correct a condition?

Go to Step 14

Go to Symptoms - Hydraulic Brakes

1. Install or connect components that were removed or disconnected during diagnosis.
2. Road test the vehicle in order to confirm proper operation. Refer to Brake System Vehicle Road Test .

Is the condition still present?

Go to Step 2

System OK