Booster Assembly Construction; Diagnostic Information And Procedures; Brake Diagnosis Note - Suzuki GRAND VITARA Owner's Manual

2. Secondary piston
5. Primary piston return spring

Booster Assembly Construction

The booster is located between the master cylinder and the brake pedal. It is so designed that the force created when
the brake pedal is depressed is mechanically increased combined with the engine vacuum.
CAUTION
!
• Never disassemble brake booster assembly. If it is found faulty, replace it with new assembly.
• The torque values specified are for dry, unlubricated fasteners. If any hydraulic component is
removed or brake line disconnected, bleed the brake system.

Brake Diagnosis Note

Road Test for Brakes
Brakes should be tested on dry, clean, smooth and
reasonably level roadway which is not crowned.
Road test brakes by making brake applications with both
light and heavy pedal forces at various speeds to
determine if the vehicle stops evenly and effectively.
Also drive vehicle to see if it leads to one side or the
other without brake application. If it does, check the tire
pressure, front end alignment and front suspension
attachments for looseness.
See diagnosis flow table for other causes.
Brake Fluid Inspection
Brake fluid leaks
Check the master cylinder fluid levels. While a slight
drop in reservoir level does result from normal lining
wear, an abnormally low level indicates a leak in the
system. In such a case, check the entire brake system
6. Secondary piston return spring
7. Grommet

Diagnostic Information and Procedures

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Brake Control System and Diagnosis:
8. O-ring
9. Master cylinder body
for leakage. If even a slight evidence of leakage is noted,
the cause should be corrected or defective parts should
be replaced.
If fluid level is lower than the minimum level of reservoir,
refilling is necessary.
Fill reservoir with specified brake fluid.
Brake fluid
Refer to reservoir cap.
CAUTION
!
Since brake system of this vehicle is factory
filled with brake fluid indicated on reservoir
cap, do not use or mix different type of fluid
when refilling; otherwise serious damage will
occur.
Do not use old or used brake fluid, or any
fluid from a unsealed container.
4A-4
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