Pinpoint Test D: The Pedal Feels Spongy
- D1: CHECK FOR SPONGY PEDAL (ENGINE OFF)
- Check for a firm brake pedal.
Is the brake pedal effort and brake pedal travel normal?
- Yes : Vehicle is OK.
- No : GO to D2.
- Check for a firm brake pedal.
- D2: CHECK BRAKE PEDAL RESERVE (ENGINE OFF)
- 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.
Refer to: Brake System Bleeding - Vehicles Without: Carbon Ceramic Brakes (General Procedures).
- Pump the brake pedal 10 times and hold on the final application.
- D3: CHECK BRAKE PEDAL RESERVE (ENGINE ON)
- Engine is idle.
- Apply the brake pedal lightly three or four times.
- Wait 15 seconds for the vacuum to recover.
- Push down on the brake pedal until it stops moving downward or an increased resistance to the brake pedal travel occurs.
- Hold the brake pedal in the applied position while increasing the engine speed to 2000 revs/min.
- 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
- Check the brake master cylinder reservoir fluid level.
Is the fluid level OK?
- Yes
: BLEED the brake system.
Refer to: Brake System Bleeding - Vehicles Without: Carbon Ceramic Brakes (General Procedures). TEST the system for normal operation.
- No
: CHECK for leaking brake system and RECTIFY as necessary. ADD fluid and BLEED the brake system.
Refer to: Brake System Bleeding - Vehicles Without: Carbon Ceramic Brakes (General Procedures). TEST the system for normal operation. REPEAT road test if necessary.
- Check the brake master cylinder reservoir fluid level.