Pinpoint Test J: Excessive/Erratic Brake Pedal Travel

PINPOINT TEST G189234p10: EXCESSIVE/ERRATIC BRAKE PEDAL TRAVEL
G189234t34: TEST ON ROUGH ROAD
1. Road test the vehicle on rough road conditions. 2. Apply the brakes slowly.
^ Is the brake pedal effort and brake pedal travel normal?
Yes
Vehicle is OK
No
GO to Pinpoint Test G189234t35.

G189234t35: CHECK BRAKE FLUID LEVEL
1. Check the brake master cylinder reservoir fluid level.
^ Is the fluid level OK?
Yes
GO to Pinpoint Test G189234t36.
No
CHECK brake master cylinder reservoir sealing points. ADD brake fluid and BLEED the brake system. TEST the system for normal operation. REPEAT road test if necessary.

G189234t36: CHECK BRAKE PEDAL RESERVE
1. Engine is idle. 2. Apply the brake pedal lightly three or four times. 3. Wait 15 seconds for the vacuum to replenish. 4. Push down on the brake pedal until it stops moving downward or an increased resistance to the brake pedal travel occurs. 5. Hold the brake pedal in the applied position while increasing the engine speed to 2000 revs/minutes. 6. Release the accelerator pedal.
^ Does the brake pedal move downward as the engine speed returns to idle?
Yes
GO to Pinpoint Test G189234t37.
No
CHECK the vacuum to the brake booster.

G189234t37: CHECK THE FRONT HUB AND BEARING ASSEMBLY
1. Check the front hub and bearing assembly.
^ Are the front wheel bearings loose?
Yes
INSTALL a new front wheel bearing if damaged. TEST the system for normal operation.
No
CHECK the front brake discs for thickness variances.