Check Sheet B: Notes
Input specifics on how the brake pedal depression feels.
| Depression feel | Possible cause | ||
| □ | Somewhat soft when first depressing pedal | Temporary loss of braking effectiveness such as brake fade | |
| □ | Depressed the pedal with same force and held, but it sinks gradually | Brake fluid leakage | |
| □ | Depressing the pedal felt soft from beginning and there was no response to depressing pedal throughout | Brake fluid leakage | |
| □ | Other | () | |
NOTE:
- Normally, greater force is required to depress the brake pedal as it is being depressed. (Brake pedal depression gradually gets stiffer and stiffer)
If possible, use the indicated vehicle and ask the customer to depress the brake pedal. Does the feel of the brake pedal depression recur while the engine is idling?
| Repeatability/no repeatability | Verification result | Action | |
|---|---|---|---|
| □ | Recur | Brake fluid leakage | Method of handling according to the inquiry results: Go to brake fluid leakage |
| □ | Not recur | Temporary loss of braking effectiveness such as brake fade | Go to inquiry (3) |
| □ | Difficult to handle | ||
NOTE:
- For vehicles equipped with mechanical brake assist, when the brake pedal is depressed strongly, a click sound is generated and the brake pedal feel is temporarily softened, however, the brake assist operates normally and it does not indicate a malfunction.
When it felt like the brakes did not operate, did it feel like there was any abnormality in the engine speed?
| □ | Engine speed was normal | |
|---|---|---|
| □ | Engine speed increased: Negative pressure decreased | From approx. () rpm to approx. () rpm |
| □ | Engine speed decreased: Negative pressure decreased | From approx. () rpm to approx. () rpm |
| □ | Engine stall/was stalled: When brakes were pumped after the engine stall, negative pressure decreased | |