Power Brake Unit Inspection - Mazda RX-8 Manual

POWER BRAKE UNIT

POWER BRAKE UNIT INSPECTION

NOTE:
The following inspection methods are simple inspection methods to judge the function of the power
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brake unit.
If there is any malfunction in the power brake unit, replace the power brake unit as a single unit.
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Without Using SST
Operation inspection
1. With the engine stopped, depress the pedal several times.
2. With the pedal depressed, start the engine.
3. If the pedal moves down slightly immediately after starting the engine, the unit is normal.
Vacuum function inspection
1. Start the engine.
2. After driving the vehicle for 1    2 min , stop the engine.
3. Depress the pedal with normal force.
4. If the first pedal stroke is long and becomes shorter with subsequent strokes, the unit is normal.
If a problem is found, inspect for damage to or improper installation of the check valve and
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vacuum hose. After repairing, inspect again.
Vacuum loss function inspection
1. Start the engine.
2. Depress the pedal with normal force.
3. With the pedal depressed, stop the engine.
4. Maintain the pedal depressed for approx. 30 s .
5. If the pedal height does not change during this time, the unit is normal.
Using SST
Pre-inspection preparation
1. Install the SST (49 D043 002) in the orientation shown in the figure. (with DSC)
NOTE:
(w) RX8 - Brakes
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