vauxhall Workshop Repair Guides

Vauxhall Workshop Service and Repair Manuals

Brake System Noise > < Brake System Slow Release

Braking Action Uneven - Front to Rear

Test Description

The number below refer 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


-


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 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


-


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.

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


-


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

 

Brake System Noise > < Brake System Slow Release