Pinpoint Test D: the Pedal Feels Spongy

Pinpoint Test D: the Pedal Feels Spongy

D1: CHECK FOR SPONGY PEDAL (ENGINE OFF)
1. Check for a firm brake pedal.
^ Is the brake pedal effort and brake pedal travel normal?

-> Yes
Vehicle is OK.

-> No
Go to [D2]

D2: CHECK BRAKE PEDAL RESERVE (ENGINE OFF)
1. Pump the brake pedal 10 times and hold on the final application.
^ Does the brake pedal feel firm on final application?

-> Yes
Go to [D3]

-> No
BLEED the brake system. TEST the system for normal operation.

D3: CHECK BRAKE PEDAL RESERVE (ENGINE ON)
1. Engine is idle.
2. Apply the brake pedal lightly three or four times.
3. Wait 15 seconds for the vacuum to recover.
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/mint
6. Release the accelerator pedal.
^ Does the brake pedal move downward as the engine speed returns to idle?

-> Yes
Go to [D4]

-> No
CHECK the vacuum to brake booster.

D4: CHECK BRAKE FLUID LEVEL
1. Check the brake master cylinder reservoir fluid level.
^ Is the fluid level OK?

-> Yes
BLEED the brake system. TEST the system for normal operation.

-> No
CHECK brake master cylinder reservoir sealing points. ADD fluid and BLEED the brake system. TEST the system for normal operation. REPEAT road test if necessary.