SAAB WIS ONLINE

Brake Pedal Excessive Effort

Brake Pedal Excessive Effort


Step Action Yes No
DEFINITION: Brake pedal requires an increased amount of input from the driver to obtain good braking action and/or stopping distance is increased.
1
Were you sent here from the Hydraulic Brake Symptom table? Go to Step 2 Go to Diagnostic Starting Point - Vehicle
2

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

• Vacuum leaks, if equipped with vacuum power assist

• Power steering fluid leaks, if equipped with hydraulic power assist

• Lack of lubrication, binding or excessively worn pushrod or pedal pivots or pivot bushings

• Bent or damaged pedal pushrod, pedal, or pedal bracket

• Damaged or improperly operating brake booster assembly

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


Did you find and correct a condition? 		Go to Step 5 Go to Step 3
3

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

• Binding caliper pistons

• Internally damaged flexible brake hoses; hindering fluid flow

• External brake fluid leaks

• Kinked or damaged flexible brake hoses and/or pipes

• Internal brake fluid leaks; improperly operating master cylinder

• Poor brake fluid quality; low boiling point

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


Did you find and correct a condition? 		Go to Step 5 Go to Step 4
4

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

• Excessively worn linings

• Glazed linings

• Cracked, distorted or damaged linings

• Contaminated linings

• Binding, damaged or excessively worn caliper hardware and/or lining hardware

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

• Excessively worn or corroded rotor friction surfaces

• Glazed rotor friction surfaces

• Hard spots, heat checks, blueing discoloration of rotor friction surfaces

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


Did you find and correct a condition? 		Go to Step 5 Go to Diagnostic Starting Point - Vehicle
5

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