wheel bolts MAZDA MIATA 1991 Factory Service Manual

ADJUSTMENTS
CLOCKSPRING CENTERING
Set front wheels in straight-ahead position. Turn clockspring connector clockwise until it stops (do not force).
Return connector 2 3/4 turns counterclockwise. Rotate clockspring connector further, if necessary, to align
marks on connector and outer housing.
DISPOSAL PROCEDURES
DEPLOYED AIR BAG
Dispose deployed air bag module as you would any other part. Wear gloves and safety glasses when handling
air bag module.
SCRAPPED VEHICLE
1. Ensure vehicle is outside, and away from other vehicles and people. Open convertible top and doors.
Disconnect negative battery cable.
2. Ensure air bag module is firmly mounted to steering wheel. Remove knee protector and disconnect
Orange and Blue clockspring connectors at base of steering column. See Fig. 1
. Cut clockspring
connector Blue wires.
3. Connect 2 jumper wires (20 feet long) to cut clockspring wires. Connect other ends of wires to a 12-volt
battery to deploy air bag. Because of heat, wait 10 MINUTES before touching deployed air bag.
REMOVAL & INSTALLATION
CRASH SENSORS NOTE: Perform the following procedures when scrapping a vehicle with undeployed air
bag.
WARNING:Follow air bag service precautions to prevent accidentalair bag
deployment and personal injury. See SERVICE PRECAUTIONS.
NOTE: After component replacement, check system to ensure proper operation. See
SYSTEM OPERATION CHECK.
NOTE: Crash sensor orientation and mounting is important for proper operation. All
sensors must be positioned so that arrow points forward. If there is sheet metal
damage near sensor mounting point, inspect body structure at sensor
mounting point for deformation. If damaged, restore to original shape. Ensure
sensor mounting bolts or nuts are tightened to specification. See TORQUE
SPECIFICATIONS table.

1991 Mazda MX-5 Miata
AIR BAG RESTRAINT SYSTEM MAZDA 1990-91 AIR BAGS
Microsoft
Sunday, July 05, 2009 2:11:16 PMPage 4 © 2005 Mitchell Repair Information Company, LLC.

Removal (Front Impact Sensors)
1. Before proceeding, follow air bag service precautions. See SERVICE PRECAUTIONS. Disable air bag
system. See DISABLING & ACTIVATING AIR BAG SYSTEM.
2. Front impact sensors are located in left front and right front of vehicle. See Fig. 2
or Fig. 3 . To remove
left or right sensor, remove wheelwell undercover, and disconnect connector(s). Remove retaining clips
and bolts. Remove sensor(s).
Fig. 2: Locating Crash Sensors (Miata)

Courtesy of MAZDA MOTORS CORP.

1991 Mazda MX-5 Miata
AIR BAG RESTRAINT SYSTEM MAZDA 1990-91 AIR BAGS
Microsoft
Sunday, July 05, 2009 2:11:16 PMPage 5 © 2005 Mitchell Repair Information Company, LLC.

TORQUE SPECIFICATIONS
DIAGNOSIS & TESTING
SELF-DIAGNOSTIC SYSTEM
Trouble Shooting
AIR BAG warning light flashes are used to diagnose air bag system. The number of warning light flashes
depends on the type of fault being detected. Codes are prioritized so that if 2 or more faults are present, the
highest test-priority fault indication will remain until corrected.
Warning Light Does Not Illuminate
Check for blown fuses, burned-out bulb, disconnected diagnostic module, or open circuit between warning light
and diagnostic module.
Warning Light Flashes Or Remains On
Check code output of AIR BAG warning light. See AIR BAG FLASH CODES table.
AIR BAG FLASH CODES
ApplicationFt. Lbs. (N.m)
Air Bag Module Nuts12-15 (16-20)
Steering Wheel Nut29-36 (39-49)
INCH Lbs. (N.m)
Front Impact Sensor Bolts78-113 (9-13)
Rear Safing Sensor Nuts
Miata78-113 (9-13)
RX761-87 (7-10)
WARNING:Follow air bag service precautions to prevent accidentalair bag
deployment and personal injury. See SERVICE PRECAUTIONS.
NOTE: After component replacement, check system to ensure proper operation. See
SYSTEM OPERATION CHECK.
PriorityFlash CodeCause/Diagnosis
1Remains OnFaulty Diagnostic Module
Poor Connection Of Diagnostic
Module Connector (See
DIAGNOSTIC TEST NO. 1)
2Flashes 3 TimesOpen Circuit
Poor Connection Of Power Source

1991 Mazda MX-5 Miata
AIR BAG RESTRAINT SYSTEM MAZDA 1990-91 AIR BAGS
Microsoft
Sunday, July 05, 2009 2:11:16 PMPage 10 © 2005 Mitchell Repair Information Company, LLC.

WHEEL SPEED SENSOR ROTORS
Inspection
Perform a comprehensive visual inspection of sensor rotor. If any damage is noted, replace sensor rotor. Sensor
rotors are attached to wheel hubs.
REMOVAL & INSTALLATION
HYDRAULIC UNIT
Removal
Remove hydraulic lines from unit. Disconnect hydraulic unit connectors. Remove nuts securing unit. Remove
hydraulic unit.
Bleeding Hydraulic Unit
Before bleeding hydraulic unit, bleed brake system in appropriate sequence. See BRAKE LINE BLEEDING
SEQUENCE TABLE under BLEEDING BRAKE SYSTEM. Bleed hydraulic unit by opening bleeder screw on
unit. See Fig. 12
.
Installation
To install, reverse removal procedure. Tighten mounting bolts to specification. See TORQUE
ApplicationConnector Terminals (1)
Miata
Left Front"K" & "G"
Left Rear"O" & "Q"
Right Front"U" & "F"
Right Rear"L" & "P"
RX7
Left Front"D" & "F"
Left Rear"H" & "I"
Right Front"U" & "W"
Right Rear"X" & "Z"
929
Left Front"K" & "G"
Left Rear"O" & "Q"
Right Front"J" & "F"
Right Rear"L" & "P"
(1)See Fig. 4 or Fig. 5 to identify ABS control unit terminals.

1991 Mazda MX-5 Miata
ANTI-LOCK BRAKE SYSTEM 1988-91 BRAKES Mazda Anti-Lock Brake System
Microsoft
Sunday, July 05, 2009 2:17:32 PMPage 14 © 2005 Mitchell Repair Information Company, LLC.

SPECIFICATIONS TABLE at end of article.
Fig. 12: Locating Hydraulic Unit Bleeder Screw

Courtesy of MAZDA MOTORS CORP.
WHEEL SPEED SENSOR ROTOR
Removal (Miata)
Remove brake caliper. Remove wheel hub. On rear axle, carefully remove sensor rotor from axle using a chisel.
On front rotor, remove sensor rotor using Puller (49- 0839-425C).
Installation
Press sensor rotor onto axle using Installer (49- H026-101A). Install sensor rotor on front rotor with chamfered
edge toward hub using Press Adapter (49-F001-95). To complete installation, reverse removal procedure.
Tighten mounting bolts to specification. See TORQUE SPECIFICATIONS TABLE at end of article.
Removal & Installation (RX7)
Remove brake caliper and wheel hub. On rear hub, remove wheel hub from outer toe control hub using Puller
(49-F026-103) and Installer (49-F026-102). On front rotor, remove rotor-to-hub bolts using Allen wrench. On
rear rotor, remove rotor-to-hub screws. To install, reverse removal procedure. Tighten mounting bolts to
specification. See TORQUE SPECIFICATIONS TABLE at end of article.
Removal & Installation (929)

1991 Mazda MX-5 Miata
ANTI-LOCK BRAKE SYSTEM 1988-91 BRAKES Mazda Anti-Lock Brake System
Microsoft
Sunday, July 05, 2009 2:17:32 PMPage 15 © 2005 Mitchell Repair Information Company, LLC.

Remove brake caliper and wheel hub. On rear axle, carefully remove sensor rotor from axle using chisel. On
front rotor, remove sensor rotor using Puller (49-0839-425C). To install, press sensor rotors onto axle and front
rotor using Installer (49-H026-101A). On front rotor, install sensor rotor with chamfered edge toward hub. To
complete installation, reverse removal procedure. Tighten mounting bolts to specification. See TORQUE
SPECIFICATIONS TABLE at end of article.
WHEEL SPEED SENSOR
Removal & Installation
Unplug wheel sensor connector. Remove sensor bolt. Remove wheel sensor from vehicle. To install, reverse
removal procedure. On RX7, adjust wheel sensor so clearance between sensor and rotor is .016-.039" (.40-1.0
mm). Tighten mounting bolts to specification. See TORQUE SPECIFICATIONS TABLE at end of article.
DIAGNOSING ABS SYSTEM
ABS TESTER OPERATION
Fig. 13: Operating ABS Tester

Courtesy of MAZDA MOTORS CORP.
TESTING SEQUENCE

1991 Mazda MX-5 Miata
ANTI-LOCK BRAKE SYSTEM 1988-91 BRAKES Mazda Anti-Lock Brake System
Microsoft
Sunday, July 05, 2009 2:17:32 PMPage 16 © 2005 Mitchell Repair Information Company, LLC.

Fig. 3: Removing Axle Shaft From Hub Assembly
Courtesy of MAZDA MOTORS CORP.
2. Remove upper control arm bolt, and pull knuckle/hub assembly outward. Remove inner CV joint from
differential flange. Remove axle shaft from knuckle/hub assembly. If axle shaft is stuck in knuckle/hub
assembly, use plastic or soft-faced hammer to tap axle shaft from knuckle/hub assembly. See Fig. 3
.
Remove axle shaft lock nut.
Installation
To install, reverse removal procedure. Align marks on differential and axle shaft flanges. Check rear wheel
alignment. See appropriate article in WHEEL ALIGNMENT. Tighten all bolts and nuts to specification. See
TORQUE SPECIFICATIONS
. Stake axle shaft lock nut. See Fig. 4.
NOTE: Manufacturer recommends using new axle shaft lock nut during installation.

1991 Mazda MX-5 Miata
1990-93 DRIVE AXLES Axle Shafts - MX-5 Miata
Microsoft
Sunday, July 05, 2009 2:16:33 PMPage 4 © 2005 Mitchell Repair Information Company, LLC.

Removal & Installation (B2200 & B2600i 2WD)
1. With caliper assembly removed, remove wheel hub grease cap, cotter pin, lock plate and ring adjusting
lock nut. Remove thrust washer and outer bearing from hub. Slide hub and rotor assembly from spindle.
2. Mark rotor-to-hub position. Separate rotor from hub. Machine rotor if lateral runout exceeds
specification. Replace rotor if measured thickness is less than specified minimum thickness. See DISC
BRAKE SPECIFICATIONS at end of article.
3. To install, reverse removal procedure and evenly tighten rotor-to-hub bolts. Adjust wheel bearings.
Removal & Installation (B2600i 4WD) 1) Remove front caliper. Set hub to FREE position. Remove hub
bolts. Remove hub as an assembly. Install 2 bolts and nuts to retain hub assembly together. Remove snap
ring and spacer.
4. Remove set bolt and plate. Remove nut. Remove rotor and hub assembly. Mark rotor-to-hub position.
Remove rotor from hub. Machine rotor if lateral runout exceeds specification. Replace rotor if measured
thickness is less than specified minimum thickness. See DISC BRAKE SPECIFICATIONS
at end of
article. To install, reverse removal procedure.
Removal & Installation (Miata, MPV, MX-6, Protege, RX7, 323 & 626)
1. Raise and support front of vehicle. Remove wheel. Remove caliper with brake hose connected. Support
caliper using rope. Remove 2 rotor-to-hub screws. Remove rotor.
2. Machine rotor if lateral runout exceeds specification. Replace rotor if measured thickness is less than
specified minimum thickness. See DISC BRAKE SPECIFICATIONS
at end of article. To install,
reverse removal procedure.
Removal & Installation (Navajo 2WD)
1. Raise vehicle, and support using safety stands. Remove wheel and caliper assemblies. Remove dust cap,
cotter pin, nut, washer and outer bearing. Carefully remove hub and rotor assembly. Remove inner
bearing and seal.
2. To install, reverse removal procedure. Adjust front wheel bearings. While rotating rotor, tighten adjusting
nut to 17-25 ft. lbs. (23-34 N.m). Back off adjusting nut 120-180 degrees. Install bearing retainer and new
cotter pin.
Removal (Navajo 4WD With Automatic Locking Hubs)
1. Raise vehicle, and support using safety stands. Remove wheel assembly and caliper. See FRONT DISC
BRAKE PADS under REMOVAL & INSTALLATION. Remove retainer washers from lug nut studs.
Remove automatic locking hub housing from spindle.
2. Remove snap ring from end of spindle shaft. Remove axle spacer. See Fig. 13
. Carefully pull plastic
moving cam off wheel bearing adjusting nut. Remove 2 plastic thrust spacers from adjusting nut. Using a
magnet, remove locking key.
CAUTION: DO NOT pry on plastic cam or spacers during removal as damage
may result. To prevent damaging spindle threads, remove locking
key before removing adjusting nut.

1991 Mazda MX-5 Miata
BRAKE SYSTEM 1991 BRAKES Mazda Brake System
Microsoft
Sunday, July 05, 2009 2:18:08 PMPage 19 © 2005 Mitchell Repair Information Company, LLC.

Raise and support vehicle. Remove rear wheels. Remove brake rotor. Remove upper and lower return springs.
See Fig. 21
. Remove hold-down springs and pins. Remove parking brake shoes. Separate adjuster and
operating lever. Minimum lining thickness is .04" (1 mm).
Fig. 21: Exploded View of Parking Brake Assembly (929)

Courtesy of MAZDA MOTORS CORP.
Installation
Connect operating lever to parking brake cable. Set marked side (with arrow) of operating lever to front side.
Position shoes and adjuster. Ensure threaded side of adjuster faces forward on left wheel and rearward on right
wheel. To complete installation, reverse removal procedure. Adjust parking brake. See PARKING BRAKE
under ADJUSTMENTS
at beginning of article.
REAR AXLE BEARING & OIL SEAL
Removal (B2200 & B2600i)
1. Remove wheel and brake drum. Disconnect parking brake cable and brake line. Remove backing plate
bolts. Remove backing plate and rear axle assembly. Remove axle bearing lock nut using Holder (49-
NOTE: For information on models with sealed wheel bearings, see appropriate article
in the SUSPENSION Section.

1991 Mazda MX-5 Miata
BRAKE SYSTEM 1991 BRAKES Mazda Brake System
Microsoft
Sunday, July 05, 2009 2:18:08 PMPage 31 © 2005 Mitchell Repair Information Company, LLC.

DISC BRAKE SPECIFICATIONS
DISC BRAKE SPECIFICATIONS
Rotor-To-Hub Bolt
B2200 & B2600i40-51 (54-69)
MX-6 & 62636-43 (49-58)
32333-40 (45-54)
Wheel Bearing Lock Nut
B2200 & B2600i (Rear)145-217 (197-295)
323 (Front)116-174 (158-237)
Wheel Lug Nut
B2200 & B2600i
Standard Wheel65-87 (88-118)
Styled Wheel87-108 (118-147)
Navajo85-115 (115-155)
All Others65-87 (88-118)
INCH Lbs. (N.m)
Parking Brake Cable Lock Nut
B2200 & B2600i60-84 (7-10)
All Others168-252 (19-29)
Wheel Cylinder Mounting Bolt
B2200 & B2600i 2WD108-144 (12-16)
B2600i 4WD180-216 (20-24)
Except B2200, B2600i & Navajo (2) 84-108 (10-12)
(1)These bolts secure caliper directly to steering knuckle. On Protege, tighten to 29-36 ft. lbs. (39-49
N.m). On RX7, tighten to 58-72 ft. lbs. (78-98 N.m).
(2)Information is not available from manufacturer for Navajo.
ApplicationIn. (mm)
B2200 & B2600i 2WD Front (1)
Original Thickness.79 (20)
Discard Thickness.71 (18)
B2600i 4WD Front (1)
Original Thickness.87 (22)
Discard Thickness.79 (20)
Miata
Front (2)
Original Thickness.71 (18)
Discard Thickness.63 (16)

1991 Mazda MX-5 Miata
BRAKE SYSTEM 1991 BRAKES Mazda Brake System
Microsoft
Sunday, July 05, 2009 2:18:09 PMPage 39 © 2005 Mitchell Repair Information Company, LLC.