Did you perform the Brake System Diagnosis?

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Go to Step 2

Go to Brake System Diagnosis

Inspect the hydraulic brake system for leaks.

Are there any leaks?

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Go to Step 3

Go to Step 5

1. Tighten the brake hose or pipe fittings to specifications.
2. Start the engine.
3. Press the brake pedal several times.
4. Turn OFF the engine.
5. Inspect the hydraulic brake system for leaks.

Does the leak still exist?

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Go to Step 4

Go to Step 25

Replace the applicable brake hose or the brake pipe.

Did you complete the repair?

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Go to Step 25

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Inspect the brake linings for the following:

Refer to Brake Pad Inspection in Disc Brakes.

Do any of the above conditions exist?

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Go to Step 6

Go to Step 7

Replace the brake linings as necessary. Refer to the appropriate procedure in Disc Brakes.

Did you complete the repair?

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Go to Step 25

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Inspect the following brake caliper assembly components for corrosion:

Are any of the above components corroded or binding?

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Go to Step 8

Go to Step 9

Repair or replace the brake calipers. Refer to the appropriate procedure in Disc Brakes.

Did you complete the repair?

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Go to Step 25

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Inspect the brake components for loose, missing or broken components. Refer to Brake Pad Inspection in Disc Brakes.

Are there loose, missing or broken brake components?

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Go to Step 10

Go to Step 11

Repair or replace the components as necessary. Refer to the appropriate procedure in Disc Brakes.

Did you complete the repair?

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Go to Step 25

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1. Inspect the brake pedal assembly for bent or misaligned components.
2. Inspect the brake pedal for interference (binding) between the pedal and the booster input rod.

Is the brake pedal binding?

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Go to Step 12

Go to Step 13

Repair or replace components as necessary. Refer to Brake Pedal Bracket Replacement .

Did you complete the repair?

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Go to Step 25

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1. Check for collapsed, damaged, or bent brake pipes. Refer to Brake Hose and Pipe Diagnosis .
2. Check the brake hoses for sharp kinks.

Are the brake hoses or the brake pipes collapsed, bent, or kinked?

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Go to Step 14

Go to Step 15

Repair or replace the brake hoses or pipes as necessary. Refer to the appropriate procedure:

Did you complete the repair?

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Go to Step 25

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1. Remove the master cylinder reservoir cover.
2. Rapidly apply the brake pedal 3 cm (1 in), observing the brake fluid in the reservoir.

Does the fluid surface in the reservoir show movement, or spouting?

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Go to Step 17

Go to Step 16

1. Install the master cylinder reservoir cover.
2. Loosen the master cylinder mounting nuts 13 mm (0.50 in).
3. Separate the master cylinder from the vacuum brake booster.
4. Apply the brake pedal 3 cm (1 in).

Does the booster output rod move?

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Go to Step 19

Go to Step 18

Replace the master cylinder. Refer to Master Cylinder Replacement .

Did you complete the repair?

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Go to Step 25

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Replace the vacuum brake booster. Refer to Power Vacuum Brake Booster Replacement .

Did you complete the repair?

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Go to Step 25

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Inspect the brake fluid for contamination.

Is the brake fluid contaminated?

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Go to Step 20

Go to Step 21

Replace all of the hydraulic brake system rubber components.

1. Flush the hydraulic brake system. Refer to Hydraulic Brake System Flushing .
2. Replace all of the hydraulic brake system rubber components. Refer to the appropriate procedures:

•	Brake Pressure Modulator Valve Replacement in Antilock Brake System.

•	Master Cylinder Replacement or Master Cylinder Overhaul .

•	Front Brake Hose Replacement .

•	Rear Brake Hose Replacement .

•	Brake Caliper Replacement or Front Brake Caliper Overhaul in Disc Brakes.

•	Brake Caliper Replacement or Rear Brake Caliper Overhaul in Disc Brakes.

3. Flush the hydraulic brake system. Refer to Hydraulic Brake System Flushing .
4. Bleed the brake system. Refer to Hydraulic Brake System Bleeding .

Did you complete the repair?

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Go to Step 25

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Check the master cylinder outlet ports for restricted passages. Refer to Hydraulic Brake System Bleeding .

Are the outlet ports restricted?

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Go to Step 22

Go to Step 23

1. Replace the master cylinder. Refer to Master Cylinder Replacement .
2. Flush the hydraulic brake system. Refer to Hydraulic Brake System Flushing .
3. Bleed the brake system. Refer to Hydraulic Brake System Bleeding .

Did you complete the repair?

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Go to Step 25

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Check the brake pipes and the brake hoses for restricted passages. Refer to Hydraulic Brake System Bleeding .

Check for the following:

Do any of the above conditions apply?

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Go to Step 24

Go to Brake System Diagnosis

1. Determine the area of the restriction. This will involve the disassembly of individual brake lines and checking for low fluid output.
2. Flush the individual brake line or the brake hose.
3. If the restriction cannot be removed, replace the restricted brake hose or the brake pipe. Refer to the appropriate procedure.

•	Front Brake Hose Replacement

•	Rear Brake Hose Replacement

•	ISO Flares Replacement

4. Flush the hydraulic brake system. Refer to Hydraulic Brake System Flushing .

Did you complete the repair?

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Go to Step 25

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Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 2