clock MAZDA MIATA 1991 Factory User Guide

Fig. 14: Checking Resistance at Clockspring Terminal
Courtesy of MAZDA MOTORS CORP.
3. If continuity is present, disconnect diagnostic module Black and Gray connectors. See Fig. 10
or Fig. 11.
Check continuity between diagnostic module Black connector Green/White wire and clockspring
connector Red wire. Also check continuity between diagnostic module Black connector Green/Yellow
wire and clockspring connector Green/Yellow wire. If continuity is not present, replace wire harness
assembly.
4. If continuity is present, check continuity between diagnostic module Black connector Green/Yellow wire
and ground. If continuity is present, replace wire harness assembly. If continuity is not present, replace air
bag module.
DIAGNOSTIC TEST NO. 7
Warning Light Flashes 2 Or 8 Times
1. Disable air bag system. See DISABLING & ACTIVATING AIR BAG SYSTEM. Disconnect diagnostic
module Black and Gray connectors. See Fig. 10
or Fig. 11 . Check continuity between Black connector
Brown/Yellow wire and ground. If continuity is not present, go to step 4). If continuity is present, go to
next step.

1991 Mazda MX-5 Miata
AIR BAG RESTRAINT SYSTEM MAZDA 1990-91 AIR BAGS
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1. Start engine, and observe ANTI-LOCK light. Light should illuminate for a few seconds. If light does not
illuminate as described, remove clock and bezel assembly from dashboard. Slide warning and clock unit
from instrument panel. Connect terminal "E" to ground. See Fig. 9
. ANTI-LOCK light should illuminate.
If light does not illuminate, check bulb. If bulb is okay, check meter fuse and wiring harness.
2. Install instrument cluster, and recheck warning light operation. If light still does not illuminate for a few
seconds, check wiring harness between ANTI-LOCK light and control unit, and ANTI-LOCK light and
hydraulic unit. Check operation of hydraulic unit valve relay.
Operational Test (929)
1. Start engine, and observe ANTI-LOCK light. Light should illuminate for a few seconds. If light does not
illuminate as described, remove instrument cluster. Connect 12 volts to terminal "J" of instrument cluster
connector I-06. See Fig. 10
. Using a jumper wire, connect terminal "E" of instrument cluster connector I-
08 to negative ground. ANTI-LOCK light should illuminate. If light does not illuminate, check bulb. If
bulb is okay, check meter fuse and wiring harness.
2. Install instrument cluster, and recheck warning light operation. If light still does not illuminate for a few
seconds, check wiring harness between ANTI-LOCK light and control unit and between ANTI-LOCK
light and hydraulic unit. Check operation of hydraulic unit valve relay.
Fig. 8: Testing ANTI
-LOCK Warning Light (Miata)
Courtesy of MAZDA MOTORS CORP.

1991 Mazda MX-5 Miata
ANTI-LOCK BRAKE SYSTEM 1988-91 BRAKES Mazda Anti-Lock Brake System
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install remaining components, reverse removal procedure. See Fig. 14. After assembly is complete, wheel to
spindle end play should be .001-.003" (.02-.08 mm).
Removal & Installation (929)
1. Raise and support front of vehicle. Remove wheel. Remove caliper with brake hose connected. Support
caliper with rope. Remove hub cap, wheel bearing lock nut and washer. Remove hub and rotor assembly.
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.
3. To install, reverse removal procedure. Replace wheel bearing lock nut, and tighten to 72-130 ft. lbs. (98-
177 N.m). Check hub end play. If end play exceeds .002" (.05 mm), replace bearing. If end play is within
specification, stake lock nut at groove in axle shaft.
REAR DISC BRAKE PADS
Removal & Installation (Miata, Protege & 323)
1. Raise and support rear of vehicle. Remove wheel. Remove manual adjustment gear concealment plug
from caliper. See Fig. 15
. Insert an appropriate size Allen wrench through hole and turn manual
ad
justment gear counterclockwise to retract caliper piston.

1991 Mazda MX-5 Miata
BRAKE SYSTEM 1991 BRAKES Mazda Brake System
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Fig. 15: Rear Disc Brake Assembly (Miata, Protege & 323)
2. Remove lower guide bolt from caliper. Rotate caliper upward, and support using rope. Remove "M"
spring. Remove pads, shims and guide plates. Replace pad if lining thickness is less than .04" (1.0 mm).
To install, reverse removal procedure.
Removal & Installation (MX-6 & 626)
1. Raise and support rear of vehicle. Remove wheel. Release parking brake and disconnect parking brake
cable from caliper. Remove upper guide bolt from caliper. Rotate caliper downward and secure with rope.
Remove "V" springs. Remove pads and shims.
2. To install, turn caliper piston clockwise using Disc Brake Piston Wrench (49-FA18-602) to retract caliper
piston. Ensure groove in piston aligns with alignment pin on back of inner pad. Replace pad if lining
thickness is less than .04" (1.0 mm). To complete installation, reverse removal procedure.
Removal & Installation (RX7)
1. Raise and support rear of vehicle. Remove wheel. Remove lower guide bolt from caliper. Rotate caliper
upward, and secure using rope. Remove "V" springs. Remove pads and shims. Replace pad if lining
thickness is less than .04" (1.0 mm).

1991 Mazda MX-5 Miata
BRAKE SYSTEM 1991 BRAKES Mazda Brake System
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2. To install, turn caliper piston clockwise using Disc Brake Piston Wrench (49-FA18-602) to retract caliper
piston. Ensure groove in piston aligns with alignment pin on back of inner pad. To install remaining
components, reverse removal procedure.
Removal & Installation (929)
Raise and support rear of vehicle. Remove wheel. Remove lower guide bolt from caliper. Rotate caliper upward
and secure with rope. Remove pads and shims. Replace pad if lining thickness is less than .08" (2.0 mm). To
install, reverse removal procedure.
REAR BRAKE CALIPER
Removal & Installation
1. Raise and support rear of vehicle. On all models except 929, release parking brake and disconnect parking
brake cable from caliper. On all models, disconnect brake hose from caliper.
2. On Miata, Protege and 323, remove manual adjustment gear concealment plug from caliper. See Fig. 15
.
Insert an appropriate size Allen wrench through hole and turn manual adjustment gear counterclockwise
to retract caliper piston.
3. On all models, remove lower guide bolt from caliper. Rotate caliper upward. Pull caliper toward center of
vehicle to slide it off of caliper mount. To install, reverse removal procedure. Bleed hydraulic system.
REAR BRAKE ROTOR
Removal & Installation (Miata, Protege, RX7, 323 & 929)
Remove rear brake caliper. Remove rotor-to-hub screws. Remove rotor. 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 (MX-6 & 626)
1. Remove rear caliper, and wire aside. Remove grease cap. Remove lock nut. Remove rotor. 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.
2. To install, reverse removal procedure. Tighten lock nut to 73-131 ft. lbs. (99-178 N.m). Check end play at
grease cap. If end play exceeds .008" (.20 mm), replace wheel bearings.
REAR BRAKE SHOES
Removal (B2200, B2600i & MPV)
With brake drum removed, remove brake shoe return springs, retaining springs and guide pins. See Fig. 16 or
Fig. 17
. Remove brake shoes. Remove parking brake strut, and disconnect parking brake cable from operating
lever of secondar
y shoe. Minimum lining thickness is .04" (1 mm).

1991 Mazda MX-5 Miata
BRAKE SYSTEM 1991 BRAKES Mazda Brake System
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1 - 30 Amp (Pink) Headlights
2 - 30 Amp (Pink) Fuel Injection, Alternator
3 - 80 Amp (Black) Protection Of All Circuits
4 - 40 Amp (Green) Taillights, Shift Lock, Cruise Control, Horn, Stoplights, Hazard Warning Lights,
Interior Lights, Warning Buzzers, Radio/Cassette, Compact Disc Player, Clock
5 - Empty (1990); 60 Amp (Yellow) (1991-94) Anti-Lock Brake System
6 - 30 Amp (Pink) Cooling Fan
7 - 10 Amp (Red) Air Bag
8 - 20 Amp (Yellow) A/C Additional Fan
9 - 10 Amp (Red) Fuel Injection
10 - 30 Amp (Pink) Headlight Retractor
TRUNK MOUNTED FUSE PANEL IDENTIFICATION

1991 Mazda MX-5 Miata
FUSES & CIRCUIT BREAKERS Fuses & Circuit Breakers 1990-95 Mazda
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23 - Empty
24 - 10 Amp (Red) Interior Lights, Warning Buzzers, Radio/Cassette, Compact Disc Player, Clock
25 - 15 Amp (Blue) Radio/Cassette, Compact Disc Player, Clock, Cigarette Lighter
26 - Empty
27 - Empty
BATTERY SPECIFICATIONS
Vehicle is equipped with a special 9 9/16" x 4 3/4" x 7 3/8" 12-volt battery that is vented to outside of vehicle.
CAUTIONS & WARNINGS
SUPPLEMENTAL RESTRAINT SYSTEM (AIR BAG)
Modifications or improper maintenance, including incorrect removal and installation of the Supplemental
Restraint System (SRS), can adversely affect system performance. DO NOT cover, obstruct or change the
steering wheel horn pad in any way, as such action could cause improper function of the system. Use only plain
water when cleaning the horn pad. Solvents or cleaners could adversely affect the air bag cover and cause
improper deployment of the system.
AIR CONDITIONING SERVICING CAUTION: When battery is disconnected, vehicles equipped with computers may
lose memory data. When battery power is restored, driveability problems
may exist on some vehicles. These vehicles may require a relearn
procedure. See COMPUTER RELEARN PROCEDURES article in the
GENERAL INFORMATION Section.
NOTE: See the AIR BAGS article in the ACCESSORIES/SAFETY EQUIPMENT Section.
WARNING:To avoid injury from accidental air bag deployment, read and carefully
follow all warnings and service precautions. See appropriate AIR BAGS
article in ACCESSORIES/SAFETY EQUIPMENT.
CAUTION: Disconnect negative battery cable before servicing any air bag system,
steering column or passenger side dash component. After any repair, turn
ignition key to the ON position from passenger's side of vehicle in case of
accidental air bag inflation
CAUTION: Avoid breathing R-134a refrigerant and PAG lubricant vapors, exposure
may irritate eyes, nose and throat. To remove R-134a from system use R-
134a recycling equipment that meets SAE J2210 specifications. If
accidental system discharge occurs, ventilate work area before resuming

1991 Mazda MX-5 Miata
FUSES & CIRCUIT BREAKERS Fuses & Circuit Breakers 1990-95 Mazda
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STEERING COLUMN
1991 STEERING Mazda - Steering Columns
DESCRIPTION
The steering column consists of solid steering shaft with a lower joint assembly. Miata and RX7 convertible
models are equipped with Air Bag Restraint System consisting of an air bag module and clockspring connector
assembly located in the steering column.
REMOVAL & INSTALLATION
STEERING WHEEL & HORN PAD
Removal & Installation (B2200, B2600i, MPV & 929)
Unsnap horn pad cover. Remove steering wheel lock nut. Use a puller to remove steering wheel. To install,
reverse removal procedure.
Removal & Installation (Miata & RX7)
1. On Miata and RX7 convertible models, remove air bag module. See AIR BAG RESTRAINT SYSTEM
article in the ACCESSORIES/SAFETY EQUIPMENT section. For all models, remove horn cap (if
equipped).
2. Remove steering wheel nut. Remove steering wheel with steering wheel puller. To install, reverse
removal procedure. Tighten steering wheel nut and air bag nuts to specification. See TORQUE
SPECIFICATIONS TABLE at end of article. WARNING:Wait about 10 minutes after disabling air bag system before servicing. Air
bag system voltage is maintained for about 10 minutes after system is
disabled. Failure to wait 10 minutes before servicing system may cause
accidental air bag deployment and possible personal injury.
CAUTION: DO NOT strike steering shaft with a hammer as it may collapse.
WARNING:Before servicing Miata and RX7 convertible models, disconnect and
shield battery ground. Use caution when working around steering column
as air bag could deploy.
WARNING:Wait about 10 minutes after disabling air bag system before servicing. Air
bag system voltage is maintained for about 10 minutes after system is
disabled. Failure to wait 10 minutes before servicing system may cause
accidental air bag deployment and possible personal injury.

1991 Mazda MX-5 Miata
STEERING COLUMN 1991 STEERING Mazda - Steering Columns

1991 Mazda MX-5 Miata
STEERING COLUMN 1991 STEERING Mazda - Steering Columns
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Removal & Installation (MX-6 & 626)
Pry ornament cap from horn pad with wide-blade screwdriver. Remove steering wheel nut. Use a puller to
remove steering wheel. To install, reverse removal procedure.
Removal & Installation (Protege & 323)
Remove 2 horn pad screws from behind steering wheel. Remove horn pad. Remove steering wheel nut. Use a
puller to remove steering wheel. To install, reverse removal procedure.
COMBINATION SWITCH
Removal (Miata & RX7 Convertible)
See STEERING WHEEL & HORN PAD under REMOVAL & INSTALLATION. Remove steering wheel.
Remove column covers. Remove screws and remove combination switch with clockspring connector assembly.
Installation
1. Install combination switch and clockspring assembly. Before installing steering wheel, center
clockspring. To center clockspring, set front wheels straight ahead. Turn clockspring connector clockwise
until it stops. DO NOT force it.
2. Return connector 2 3/4 turns (counterclockwise). Rotate clockspring connector further (if necessary) to
align marks on connector and outer housing. See Fig. 1
.
3. Install steering wheel. Tighten steering wheel nut to specification. See TORQUE SPECIFICATIONS
TABLE at end of article. Install air bag module. See AIR BAG article in the ACCESSORIES/SAFETY
EQUIPMENT section.

1991 Mazda MX-5 Miata
STEERING COLUMN 1991 STEERING Mazda - Steering Columns
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Fig. 1: Aligning Clockspring Connector Alignment Marks
Courtesy of MAZDA MOTORS CORP.
Removal & Installation (All Others)
Remove steering wheel. See STEERING WHEEL & HORN PAD under REMOVAL & INSTALLATION.
Remove steering column covers. Disconnect combination switch connectors. Remove combination switch. To
install, reverse removal procedure.
IGNITION SWITCH & STEERING LOCK
Removal & Installation (All Models)
1. Remove steering wheel and combination switch. See STEERING WHEEL & HORN PAD and
COMBINATION SWITCH.
2. Remove ignition switch connectors. Remove ignition switch-to-steering lock screw. Remove ignition
switch.
3. With a hammer and chisel, make a groove on steering lock assembly shear screws. Remove 2 shear
screws with screwdriver. Remove ignition switch/steering lock assembly. To install, reverse removal
procedure. Tighten NEW shear screws until head breaks off.
STEERING COLUMN
CAUTION: Excessive pressure or impact to mainshaft during service may cause
column to collapse.

1991 Mazda MX-5 Miata
STEERING COLUMN 1991 STEERING Mazda - Steering Columns
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