For 1990-2009 cars

### Test Description

The number below refer to the step number on the diagnostic table:

1. Suspension components that are not operating properly may cause a disturbance to the vehicle during application of the brake system.

Step | Action | Yes | No
--- | --- | --- | ---
DEFINITION: Braking action or stopping force sensitive or grabbing and/or more pronounced at the front or at the rear axle. Sensitive or grabbing brakes: Excessive brake jump-in force relative to brake pedal input.
1 | Were you sent here from the Hydraulic Brake Symptom table? | Go to Step 2 | Go to Diagnostic Starting Point - Hydraulic Brakes
2 |

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

• | Improper operation of wheel cylinder pistons, if equipped

• | Improper operation of caliper pistons

• | Kinked, pinched or damaged brake pipe or flexible brake hose

• | Brake fluid leak

• | Improperly functioning proportioning valve, if equipped

• | Improper operation of dynamic rear proportioning (DRP) system, if equipped

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

Did you find and correct a condition?

Go to Step 7

Go to Step 3

3 |

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

• | Contaminated linings

• | Glazed linings

• | Distorted, cracked or damaged linings

• | Excessively worn linings

• | Aftermarket linings

• | Damaged or excessively worn caliper hardware and/or lining hardware

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

• | Glazed 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 7

Go to Step 4

4 |

1. Inspect the drum brake system, if equipped, for the following conditions.

• | Contaminated linings

• | Improper adjustment

• | Excessively worn or damaged linings

• | Weak or damaged return spring or springs

• | Excessively worn or damaged drums

• | Hard spots, heat checks, blueing discoloration of drum friction surface

• | Distorted or damaged backing plate

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

Did you find and correct a condition?

Go to Step 7

Go to Step 5

5 |

1. Inspect the suspension system for the following conditions.

• | Loose suspension component connections

• | Excessively worn or damaged suspension components

2. Adjust, repair or replace components as necessary. Refer to Diagnostic Starting Point - Suspension General Diagnosis.

Did you find and correct a condition?

Go to Step 7

Go to Step 6

6 |

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

• | Binding, bent or damaged pedal pushrod, pedal, or pedal bracket

• | Damaged or improperly operating vacuum booster, if equipped

• | Damaged or improperly operating hydraulic booster, if equipped

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

Did you find and correct a condition?

Go to Step 7

Go to Diagnostic Starting Point - Hydraulic Brakes

7 |

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