Mazda 2002 6 Workshop Manual page 609

Power Brake Unit Function Check (Inspection Using The Testers)
1. Connect the SSTs, vacuum gauge, and pedal
depression force gauge as shown in the figure to
bleed the air from SSTs and brake line. (Bleed the
air from SSTs using a air bleed valve A.)
Checking for vacuum loss (unloaded condition)
1. Stop the engine when the vacuum gauge reading reaches 66.7 kPa {500 mmHg, 19.7 inHg}.
2. Observe the vacuum gauge for 15 seconds.
• If the gauge shows 63.3—66.7 kPa {475—500 mmHg, 18.7—19.6 inHg}, the unit is operating.
• If not, inspect for damage on the check valve or vacuum hose, and examine the installation. Repair as
necessary, and inspect it again.
Checking for vacuum loss (loaded condition)
1. Start the engine.
2. Depress the brake pedal with a force of 196 N {20 kgf, 44 lbf}.
3. Stop the engine when the vacuum gauge reading reaches 66.7 kPa {500 mmHg, 19.7 inHg}.
4. Observe the vacuum gauge for 15 seconds.
5. If the gauge shows 63.3—66.7 kPa {475—500 mmHg, 18.7—19.6 inHg}, the unit is operating.
Checking for hydraulic pressure
1. When the engine is stopped (vacuum 0 kPa {0 mmHg, 0 inHg}) and the fluid pressure is within the
specification, the unit is operating.
Pedal force
588 kPa {5.95 kgf/cm
200 N {20 kgf, 44 lbf}
2. Start the engine. Depress the brake pedal when the vacuum reaches 66.7 kPa {500 mmHg, 19.7 inHg}.
• If the fluid pressure is within the specification, the unit is operating.
• If the fluid pressure is not as specified, inspect for damage to the check valve or vacuum hose, and fluid
leakage of the hydraulic line. Repair as necessary, and inspect again.
Pedal force
200 N {20 kgf, 44 lbf}
End Of Sie
CONVENTIONAL BRAKE SYSTEM
Fluid pressure
2
, 84.7 psi}
min.
Fluid pressure
2
8,787 kPa {89.60 kgf/cm ,
1,274 psi} min.
A6E6912W005
P
P–15