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Braking Action Uneven - Front to Rear

Braking Action Uneven - Front to Rear

Test Descriptions

The number below refers to the step number on the diagnostic table.

4

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 - Vehicle
2

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

• Improper operation of caliper pistons

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

• Brake fluid leak

• Improperly functioning proportion valve, if equipped

• Improper operation of dynamic rear proportion (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 6 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 6 Go to Step 4
4

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 - Vehicle .


Did you find and correct a condition? 		Go to Step 6 Go to Step 5
5

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 6 Go to Diagnostic Starting Point - Vehicle
6

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