Suzuki XL7 2007 Service Manual page 1241

Step
Replace the vacuum brake booster. Refer to "Vacuum Brake
17 Booster Replacement".
Did you complete the replacement?
Install or connect any components that were removed or
disconnected during diagnosis.
18
Did you complete the operation?
Brake System Vehicle Road Test
Preliminary Inspections
1. Visually inspect easily accessible brake system
components for obvious damage and/or leaks which
may indicate that the vehicle should not be driven
until further inspections have been completed.
2. Inspect the brake master cylinder reservoir fluid level
and adjust only if necessary for brake system road
testing. Refer to "Master Cylinder Reservoir Filling".
3. Inspect the tire inflation pressures and adjust as
necessary.
4. Inspect the tire tread patterns to ensure that they are
the same or very similar, especially per axle.
5. Ensure that the vehicle is not loaded unevenly prior
to brake system road testing.
Road Testing Procedure
WARNING
!
Road test a vehicle under safe conditions
and while obeying all traffic laws. Do not
attempt any maneuvers that could jeopardize
vehicle control. Failure to adhere to these
precautions could lead to serious personal
injury and vehicle damage.
1. Start the engine and allow it to idle.
2. Check to see if the brake system warning lamp
remains illuminated.
3. If the brake system warning lamp remains
illuminated, DO NOT proceed to test drive the
vehicle until it is diagnosed and repaired. Refer to
"Symptoms - Hydraulic Brakes: ".
4. Select a smooth, dry, clean and level road or large
lot that is as free of traffic and obstacles as possible
for brake system low speed road testing.
5. With the transmission in PARK, lightly apply the
brake pedal. Observe both the pedal feel and the
pedal travel.
6. If the brake pedal apply felt spongy, or the pedal
travel was excessive, DO NOT drive the vehicle until
it is repaired.
7. If the brake pedal apply did not feel spongy and the
pedal travel was not excessive, proceed to step 8.
8. Release and apply the brakes.
Action
9. While continuing to apply the brakes, shift the
10. With the aid of an assistant to observe the vehicle's
11. If the brake pedal apply effort was excessive, or the
12. If the brake pedal apply effort was not excessive and
13. Drive the vehicle in the opposite direction, at the
14. Drive the vehicle at a low speed and shift the
15. Select a smooth, dry, clean and level road that is as
16. Drive the vehicle at a moderate speed. Observe for a
17. While continuing to drive the vehicle at a moderate
18. If the brake pedal apply effort was excessive, or the
19. If the brake pedal apply effort was not excessive and
Brake Control System and Diagnosis:
Yes
Go to Step 18
Brake Assist System
OK
Return to Symptom
Table
transmission into DRIVE, release the brakes and
allow the engine to idle the vehicle away from the
stopped position. Observe for a slow release of the
brake system.
performance from outside of the vehicle, drive the
vehicle at a low speed and lightly apply the brakes
while driving past the assistant. Have the assistant
observe for brake system noise from the side of the
vehicle closest to them, while you observe both the
pedal effort and the pedal travel.
pedal travel was excessive, DO NOT continue to test
drive the vehicle until it is repaired.
the pedal travel was not excessive, proceed to step
13.
same low speed and lightly apply the brakes while
driving past the assistant. Have the assistant
observe for brake system noise from the side of the
vehicle closest to him.
transmission into NEUTRAL without applying the
brakes. Observe for a rapid deceleration in vehicle
speed, indicating possible brake drag.
free of heavy traffic as possible for brake system
moderate speed road testing.
pull and/or incorrect tracking of the vehicle without
the brakes applied.
speed, perform several light applies of the brakes.
Observe the pedal effort and the pedal travel,
observe for brake system noise, pulsation and/or
brake drag.
pedal travel was excessive, DO NOT continue to test
drive the vehicle until it is repaired.
the pedal travel was not excessive, proceed to step
20.
4A-22
No
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