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Fig. 27: Anti-Lock Brake System Wiring Diagram (Miata)
1991 Mazda MX-5 Miata
ANTI-LOCK BRAKE SYSTEM 1988-91 BRAKES Mazda Anti-Lock Brake System
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Fig. 28: Anti-Lock Brake System Wiring Diagram (RX7)
Fig. 29: Anti-Lock Brake System Wiring Diagram (929)
1991 Mazda MX-5 Miata
ANTI-LOCK BRAKE SYSTEM 1988-91 BRAKES Mazda Anti-Lock Brake System
Microsoft
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BRAKE SYSTEM
1991 BRAKES Mazda Brake System
DESCRIPTION & OPERATION
All models use hydraulic-operated brake system with a tandem master cylinder and a power brake unit.
BRAKE SYSTEM BLEEDING
BRAKE LINE BLEEDING SEQUENCE
ADJUSTMENTS
MASTER CYLINDER PUSH ROD (NAVAJO)
1. Remove master cylinder to gain access to push rod. To check screw adjustment, fabricate a gauge. See
Fig. 1
. NOTE: For information on anti-lock brake systems, see appropriate ANTI-LOCK BRAKE
SYSTEM article in the BRAKES Section.
NOTE: See BRAKE BLEEDING article in the BRAKES Section.
ApplicationSequence
Protege & 323RR, LR, LF, RF
RX7 (1) RR, LR, RF, LF
All OthersLongest Line First
(1)If rear caliper has not been disassembled, open upper bleed valve only.
NOTE: Push rod has an adjustment screw to maintain correct distance between
booster push rod and master cylinder piston. If push rod is adjusted too long, it
prevents master cylinder piston from completely releasing hydraulic pressure,
causing brakes to drag. If push rod is adjusted too short, it causes excessive
pedal travel and an undesirable clunk in booster area.
1991 Mazda MX-5 Miata
BRAKE SYSTEM 1991 BRAKES Mazda Brake System
1991 Mazda MX-5 Miata
BRAKE SYSTEM 1991 BRAKES Mazda Brake System
Microsoft
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Fig. 1: Adjusting Brake Booster Push Rod (Navajo)
Courtesy of FORD MOTOR CO.
2. Place gauge against master cylinder mounting surface of booster. Adjust push rod screw by turning it
until end of screw just touches inner edge of gauge slot.
REAR BRAKE SHOES
B2200 & B2600i 2WD
NOTE: Self-adjusting rear brakes only require manual adjustment when brake shoe is
replaced or operating lever is moved during service operations.
1991 Mazda MX-5 Miata
BRAKE SYSTEM 1991 BRAKES Mazda Brake System
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1. Raise and support rear of vehicle. Ensure parking brake is released. Remove plugs from rear of backing
plate (one below wheel cylinder, other near outer diameter of backing plate). Insert a screwdriver through
hole below wheel cylinder. Rotate star wheel adjuster in direction of arrow stamped on backing plate until
wheel locks.
2. Insert a drift through other hole in backing plate. Push pawl back from adjuster and back off adjuster 6-7
notches. Ensure wheel rotates freely. Perform same procedure on both sides. Adjust parking brake.
B2600i 4WD & MPV
1. Raise and support rear of vehicle. Ensure parking brake is released. Remove plugs from rear of backing
plate. Insert a screwdriver through hole for star wheel. Rotate adjuster in direction of arrow stamped on
backing plate until wheel locks.
2. Insert a drift through other hole in backing plate. Push pawl back from adjuster and back off adjuster 8-10
notches (13-15 notches on MPV). Ensure wheel rotates freely. Perform same procedure on both sides.
Adjust parking brake.
MX-6, Protege, 323 & 626
1. Raise and support rear of vehicle. Remove wheel. Release parking brake. Remove lock nut from axle
shaft. Remove brake drum. Insert screwdriver between adjusting plate and quadrant. Twist screwdriver to
disen
gage teeth. See Fig. 2 or Fig. 3 .
1991 Mazda MX-5 Miata
BRAKE SYSTEM 1991 BRAKES Mazda Brake System
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Fig. 2: Moving Quadrant on Rear Brake Adj. (MX-6 & 626)
Courtesy of MAZDA MOTORS CORP.
1991 Mazda MX-5 Miata
BRAKE SYSTEM 1991 BRAKES Mazda Brake System
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Fig. 3: Moving Quadrant on Rear Brake Adj. (Typical Protege & 323)
Courtesy of MAZDA MOTORS CORP.
2. Push adjusting lever toward backing plate. Install brake drum. Install new lock nut, and secure by
crimping. Operate parking brake a few times to reset adjuster. Adjust parking brake.
Navajo
1. Raise and support rear of vehicle. If drums are installed on vehicle, remove cover from adjusting hole at
bottom of brake backing plate. Turn adjusting screw with a brake adjusting tool until shoes drag against
brake drum and lock drum.
2. When shoes are against drum, loosen adjusting screw an additional 10-12 notches so drum rotates freely.
If drum does not rotate freely, remove wheel and drum and vacuum dust and dirt from linings. Use
sandpaper and remove rust from points where shoes touch backing plate. Apply a light coating of
molybdenum grease to brake shoe-to-backing plate contact points. Install wheel and drum and adjust
shoes.
3. To adjust brakes with rear drums removed, first clean all rust and dirt on points where shoes touch
backing plate and apply a small amount of molybdenum grease to those areas. Use a brake shoe
adjustment gauge and adjust brakes to inside diameter of drum braking surface.
4. Reverse tool and adjust brake shoes until they touch gauge. Gauge contact points on shoes must be
parallel to vehicle with center line throu
gh center of axle. Hold automatic adjusting lever out of
1991 Mazda MX-5 Miata
BRAKE SYSTEM 1991 BRAKES Mazda Brake System
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engagement while rotating adjusting screw to prevent burring screw slots. Ensure adjusting screw rotates
freely.
PARKING BRAKE
B2200 & B2600i
1. Depress brake pedal several times while vehicle is moving in Reverse. Ensure brakes are properly
adjusted. Pull parking brake lever with a force of 44 lbs. (20 kg). If stroke is 7-12 notches, parking brake
is properly adjusted.
2. If stroke is not 7-12 notches, raise and support rear of vehicle. Release parking brake lever. Loosen cable
lock nut at lever end of cable. Rotate adjusting nut until correct stroke is obtained. Operate parking brake
several times and ensure rear wheels rotate freely. Ensure parking brake warning light illuminates when
brake lever is pulled one notch.
Navajo
1. Adjust service brakes before adjusting parking brake cable. Ensure brake drums are cold. Apply parking
brake to fully depressed position. Grip threaded rod to prevent it from spinning.
2. Thread equalizer nut 6 full turns past its original position on threaded rod. See Fig. 4
. Check cable
tension at rear of equalizer assembly using Cable Tension Gauge (021-00018). If tension is not 400-600
lbs. (182-272 k
g), repeat step 2).
1991 Mazda MX-5 Miata
BRAKE SYSTEM 1991 BRAKES Mazda Brake System
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