For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
DEFINITION: Fluctuation or pulsation is felt through the brake pedal, steering wheel, seat, floor, and/or in the vehicle ONLY when braking.
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 disc brake system for the following conditions.

• | Excessive thickness variation of rotor friction surfaces

• | Excessive assembled lateral runout (LRO) of rotor friction surfaces

• | Hard spots, heat checks, blueing discoloration of rotor friction surfaces; possibly due to brake drag

• | Excessive corrosion of rotor friction surfaces; including red, gray or black oxidation

• | Loose, damaged or missing caliper or lining hardware

• | Bent or damaged caliper or mounting component

• | Excessive LRO of wheel hub/axle flange; due to damage and/or loose or excessively worn bearings

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

Did you find and correct a condition?

Go to Step 4

Go to Step 3

3 |

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

• | Out of round or damaged drum

• | Excessive radial runout of drum friction surface

• | Hard spots, heat checks, blueing discoloration of drum friction surface; possibly due to brake drag

• | Bent or damaged drum

• | Excessive radial runout of wheel hub/axle flange; due to damage and/or loose or excessively worn bearings

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

Did you find and correct a condition?

Go to Step 4

Go to Diagnostic Starting Point - Hydraulic Brakes

4 |

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