Power Brake Unit Inspection; Without Using Sst - Mazda MX-5 Miata Sport 2007 Manual

Fig. 17: Identifying Brake Fluid Level Sensor Connector
Courtesy of MAZDA MOTORS CORP.

POWER BRAKE UNIT INSPECTION

NOTE:
The following inspection methods are simple inspection methods to judge

the function of the power brake unit.
If there is any malfunction in the power brake unit, replace the power brake

unit as a single unit.

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 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 N043 001) in the orientation shown in Fig. 18 , (with DSC)
NOTE:
2007 Mazda MX-5 Miata Sport
2007 BRAKES Conventional Brake System - MX-5 Miata
Install the SST (49 N043 001) to the master cylinder using a

commercially available flare nut wrench.