Mazda MX-5 Miata (1997+). Manual — part 26

as specified, check for air in system, rear brake adjustment (drum brakes) or worn shoes or pads.

BRAKE PEDAL HEIGHT SPECIFICATIONS

Millenia & Protege

1. Released pedal height is measured between brake pedal and stoplight switch mounting bracket. See Fig.

3 . Disconnect stoplight switch electrical connector and remove switch. Measure length "L" between
stoplight switch mounting bracket and brake pedal. See Fig. 3 . On Millenia, length should be .79-
.90" (20-23 mm). On Protege, length should be .71-.86" (18-22 mm).

2. On all models, if clearance is as specified, install stoplight switch. No adjustment is necessary. If

clearance is not as specified, loosen lock nut "B" and rotate self-locking nut "A" counterclockwise until it
does not contact brake pedal.

3. Loosen push rod lock nut and rotate push rod until correct clearance between brake pedal and stoplight

switch mounting bracket is obtained. Tighten push rod lock nut. Rotate self-locking nut "A" clockwise
until clearance between brake pedal and end of self-locking nut "A" is .004-.039 (.1-1.0 mm). See Fig. 3 .
Tighten lock nut "B".

4. Install NEW stoplight switch. Stoplight switch is automatically adjusted by pulling back on brake pedal

until stoplight switch click noise is heard. Reconnect stoplight switch electrical connector. Check
stoplight operation. Adjust pedal free play. See BRAKE PEDAL FREE PLAY . Tighten push rod lock
nut to 18-25 ft. lbs. (24-34 N.m).

5. Applied pedal height is measured from angled portion of firewall (without carpet) to pedal pad center.

Start engine. Depress brake pedal with 132 lbs. (60 kg) pressure. On Millenia, distance should be 2.7" (70
mm). On Protege, distance should be 3.8" (95 mm). On all models, if distance is not as specified, check

Application

In. (mm)

Pedal Released

Miata

6.8-7.1 (171-181)

MPV

7.5-7.9 (191-201)

MX-3

7.6-7.7 (193-196)

MX-6 & 626

7.5-7.7 (191-196)

RX7

6.5-6.9 (165-176)

929

7.4-7.7 (188-195)

Pedal Applied

(1)

Miata

3.7 (95)

MPV, MX-6 & 626

3.3 (85)

MX-3

2.8 (70)

RX7

3.9 (100)

929

1.6 (40)

(1)

Minimum height.

NOTE:

When adjusting brake pedal height, a NEW stoplight switch must be used.
Stoplight switch can only be adjusted one time.

1997 Mazda MX-5 Miata

BRAKE SYSTEM 1995-97 BRAKES Mazda - Disc & Drum

for air in system, rear brake adjustment (drum brakes) or worn shoes or pads.

Fig. 3: Adjusting Brake Pedal Height (Millenia Shown; Protege Is Similar)
Courtesy of MAZDA MOTORS CORP.

TESTING

PROPORTIONING VALVE

NOTE:

B2300, B3000 and B4000 are not equipped with a proportioning valve.

1997 Mazda MX-5 Miata

BRAKE SYSTEM 1995-97 BRAKES Mazda - Disc & Drum

1. Connect 2 pressure gauges and adapters to proportioning valve. One to input port and other to output port.

Bleed brake system. See BLEEDING BRAKE SYSTEM . Depress brake pedal until pressure gauge
reads as specified and check output pressure. See PROPORTIONING VALVE PRESSURE
SPECIFICATIONS .

2. Depress brake pedal again, applying additional pressure. Recheck output pressure. See

PROPORTIONING VALVE PRESSURE SPECIFICATIONS . If output pressure is not as specified,
replace proportioning valve.

PROPORTIONING VALVE PRESSURE SPECIFICATIONS

Application

Inlet Pressure psi (kg/cm

2

)

Outlet Pressure psi

(kg/cm

2

)

Miata

With ABS

569 (40) 850 (60)

526-612 (37-43) 626-740

(44-52)

Without ABS

427 (30) 850 (60)

384-470 (27-33) 540-654

(38-46)

Millenia

430 (31) 850 (60)

400-460 (28-32) 520-600

(37-42)

MPV

1995

512 (36) 1422 (100)

484-540 (34-38) 854-995

(60-70)

1996-97

427 (30) 853 (61)

370-484 (26-34) 583-697

(41-49)

MX-3

With ABS

356 (25) 853 (61)

328-384 (23-27) 512-598

(36-42)

Without ABS

427 (30) 853 (61)

399-455 (28-32) 512-598

(36-42)

MX-6 & 626

With ABS

500 (35) 850 (60)

470-530 (33-37) 597-683

(42-48)

Without ABS

500 (35) 850 (60)

470-530 (33-37) 557-643

(39-45)

Protege

With ABS

356 (25) 853 (61)

328-384 (23-27) 568-654

(40-46)

Without ABS 1.5L

356 (25) 853 (61)

328-384 (23-27) 483-569

(34-40)

Without ABS 1.8L

356 (25) 853 (61)

328-384 (23-27) 654-740

(46-52)

RX7

570 (40) 850 (60)

530-610 (37-43) 626-739

(44-52)

929

427 (30) 853 (61)

399-455 (28-32) 541-654

1997 Mazda MX-5 Miata

BRAKE SYSTEM 1995-97 BRAKES Mazda - Disc & Drum

POWER BRAKE UNIT

1. With engine off, depress brake pedal several times. Press and hold brake pedal and start engine. If brake

pedal moves down slightly immediately after engine starts, power brake unit is operating. If brake pedal
does not move as specified, go to next step.

2. Run engine for 1-2 minutes. Stop engine. Press brake pedal several times and note if first pedal stroke is

longer than subsequent strokes. If first pedal stroke is longer than subsequent strokes, power brake unit is
operating. If length of strokes is equal, check valve and vacuum hose between vacuum source and power
brake unit. Repair as necessary, and go to next step.

3. Start engine. Press and hold brake pedal. Stop engine. Hold pedal down for about 30 seconds. If pedal

height remains at same height, power brake unit is operating. If pedal height recedes, check valve and
vacuum hose between vacuum source and power brake unit. Repair as necessary.

REMOVAL & INSTALLATION

FRONT DISC BRAKE PADS

Removal & Installation (B2300, B3000 & B4000)

1. To prevent master cylinder overflow when caliper piston is depressed, remove and discard some brake

fluid from master cylinder reservoir. Raise and support vehicle. Remove front wheel assemblies. Place a
large "C" clamp on caliper.

2. Tighten clamp to bottom piston in cylinder bore. Remove clamp. Remove 2 caliper pin bolts. Remove

caliper from rotor and wire aside. Slide brake pads off caliper anchor plate. Remove anchor plate (if
necessary). Replace pad if lining thickness is less than specified. See MINIMUM PAD LINING
SPECIFICATIONS (FRONT) .

3. To install, reverse removal procedure. Use "C" clamp and old pad to push caliper piston into piston bore

until piston bottoms out. Bleed air from brake system (if necessary).

Removal & Installation (Miata, Millenia, MPV, MX-6, 626 & 929)

1. Raise and support front of vehicle. Remove front wheel assemblies. Remove lower lock pin/guide bolt.

See Fig. 4 , Fig. 5 or Fig. 6 . Pivot caliper upward and support using rope.

2. Remove pads, shims, guide plates or pad guides and "V" springs (if equipped). Replace pad if lining

thickness is less than specified. See MINIMUM PAD LINING SPECIFICATIONS (FRONT) .

3. To install, reverse removal procedure. Use Disc Brake Expander (49-0221-600C) and an old pad to push

piston fully inward to install disc pads.

(38-46)

1997 Mazda MX-5 Miata

BRAKE SYSTEM 1995-97 BRAKES Mazda - Disc & Drum