Check Sheet A: Notes

Input specifics on how the brake pedal depression feels.

	Depression feel	Possible cause	Courtesy of MAZDA MOTORS CORP.
□	Clearly stiff when first starting pedal depression	Insufficient negative pressure supply or negative pressure leakage
□	Slightly stiff when first starting pedal depression	Insufficient negative pressure supply or negative pressure leakage
□	Becomes stiff halfway through pedal depression	Foreign matter caught behind pedal
□	Other	()

If possible, use the indicated vehicle and ask the customer to depress the brake pedal. Does the feel of brake pedal depression recur while the engine is idling?

Repeatability/no repeatability		Verification result	Action
□	Recur	Insufficient negative pressure supply, negative pressure leakage, or excessive negative pressure consumption	Method of handling according to the inquiry results: Go to insufficient negative pressure supply, negative pressure leakage, negative pressure decrease.
□	Not recur	Negative pressure supply is normal	Go to inquiry (3)
□	Difficult to handle

Stop the engine and depress the brake pedal several times to consume the negative pressure in the power brake unit. After this, ask the customer to depress the brake pedal and verify that the brake pedal is stiff similar to what the customer indicated. (In this case, brake pedal depression feel is condition c)

Repeatability/no repeatability		Verification result	Action
□	Similar	Insufficient negative pressure supply, negative pressure leakage, or excessive negative pressure consumption	Method of handling according to the inquiry results: Go to insufficient negative pressure supply, negative pressure leakage, negative pressure decrease.
□	Not so stiff.	Negative pressure supply is normal	There is a possibility that the negative pressure or the brake effectiveness decreased temporarily. Complete all subsequent inquiries to verify the details.

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

Were the brakes pumped just before it felt like the brakes were not operating?

□	Not performed
□	Performed	Occurred at the () time of the brake depression: Excessive negative pressure consumption

Did it feel like the brakes did not operate just after the engine was started?

□	The brakes did not operate after some driving.	Approx. () min after starting Approx. () km after driving
□	Braking just after starting the engine	Was the engine warmed up?	() Yes () No
□		How long was the vehicle parked until the engine was started?	Approx. () h
□		How many times were the brakes applied after the engine was started?	() times