torque specifications MAZDA MX-5 1997 Factory Repair Manual

Fig. 6: Removing Driver-Side Air Bag Module
Courtesy of MAZDA MOTORS CORP.
Installation
1. Connect negative battery cable. Turn ignition switch on. Verify that Air Bag warning light comes on for 6
seconds and then goes off. Verify that DTC 6 is set. If another diagnostic trouble code is set, perform
appropriate diagnosis and testing. See DIAGNOSIS
.
2. If DTC 6 is set, turn ignition switch to LOCK position. Disconnect negative battery cable and wait for
one minute. Connect driver-side air bag connector. Install support rope and driver-side air bag module.
Tighten air bag module retaining nuts to specification. See TORQUE SPECIFICATIONS
.
3. Activate air bag system. See DISABLING & ACTIVATING AIR BAG SYSTEM
. Check AIR BAG
warning light to ensure system is functioning properly. See SYSTEM OPERATION CHECK
.
PASSENGER-SIDE AIR BAG MODULE
WARNING:DO NOT install passenger-side air bag module unless DTC 7 is set. This
can cause accidental deployment of the air bag. Verify DTC 7 is indicated
before installing passenger-side air bag module.

1997 Mazda MX-5 Miata
AIR BAG RESTRAINT SYSTEM 1997 ACCESSORIES/SAFETY EQUIPMENT Mazda - Air Bag Restraint System
Microsoft
Sunday, July 05, 2009 1:40:47 PMPage 10 © 2005 Mitchell Repair Information Company, LLC.

Fig. 8: Connecting SST (490839285) To Clockspring Connector
Courtesy of MAZDA MOTORS CORP.
Installation
1. Connect leads of SST (490839285) to terminals B and C of clockspring connector. Set resistance of SST
(490839285) to 2 ohms. Connect negative battery cable. Turn ignition switch on. Verify that air bag
warning light comes on for 6 seconds and then goes Off. See Fig. 8
.
2. Verify that DTC 7 is set. Turn ignition switch to LOCK position. Disconnect negative battery cable and
wait for one minute. Install passenger-side air bag module and retaining bolts. Activate air bag system.
See TORQUE SPECIFICATIONS
.
3. Activate air bag system. See DISABLING & ACTIVATING AIR BAG SYSTEM
. Check AIR BAG
warning light to ensure system is functioning properly. See SYSTEM OPERATION CHECK
.
SAS UNIT
Removal
1. Before proceeding, see SERVICE PRECAUTIONS . Disable air bag system. See DISABLING &
ACTIVATING AIR BAG SYSTEM.

1997 Mazda MX-5 Miata
AIR BAG RESTRAINT SYSTEM 1997 ACCESSORIES/SAFETY EQUIPMENT Mazda - Air Bag Restraint System
Microsoft
Sunday, July 05, 2009 1:40:47 PMPage 12 © 2005 Mitchell Repair Information Company, LLC.

2. Drain cooling system. Remove dashboard. Remove heater unit. SAS unit connectors. Remove 4 SAS unit
mounting bracket nuts. Remove 2 SAS unit retaining screws. Remove SAS unit. See Fig. 9
.
Installation
To install, reverse removal procedure. Position SAS unit and bracket with arrow toward front of vehicle.
Tighten fasteners to specification. See TORQUE SPECIFICATIONS
. After SAS unit is installed, activate air
bag system. See DISABLING & ACTIVATING AIR BAG SYSTEM
. Check AIR BAG warning light to
ensure system is functioning properly. See SYSTEM OPERATION CHECK
.
CLOCKSPRING
Removal
1. Set front wheels in straight-ahead position. Before proceeding, see SERVICE PRECAUTIONS .
Disable air bag system. See DISABLING & ACTIVATING AIR BAG SYSTEM
.
2. Remove driver-side air bag module. See DRIVER
-SIDE AIR BAG MODULE . Remove steering wheel
nut. Using a puller, remove steering wheel. Remove steering column covers. Remove clockspring screws.
Remove clockspring and combination switch as an assembly.
Installation
1. To install, reverse removal procedure. Tighten steering wheel nut to specification. See TORQUE
SPECIFICATIONS .
2. After installation, activate air bag system. See DISABLING & ACTIVATING AIR BAG SYSTEM
.
Check AIR BAG warning light to ensure system is functioning properly. See SYSTEM OPERATION
CHECK .
SAS UNIT
Removal
1. Before proceeding, see SERVICE PRECAUTIONS . Disable air bag system. See DISABLING &
ACTIVATING AIR BAG SYSTEM .
2. SAS unit is located under center of dashboard. See Fig. 1
. Remove dashboard. Remove heater assembly.
Disconnect SAS unit connectors. Remove 4 SAS unit mounting bracket nuts. Remove 2 SAS unit
retainin
g screws. Remove SAS unit. See Fig. 9. NOTE: Clockspring is part of combination switch. When replacing clockspring, replace
the clockspring and combination switch as an assembly.

1997 Mazda MX-5 Miata
AIR BAG RESTRAINT SYSTEM 1997 ACCESSORIES/SAFETY EQUIPMENT Mazda - Air Bag Restraint System
Microsoft
Sunday, July 05, 2009 1:40:47 PMPage 13 © 2005 Mitchell Repair Information Company, LLC.

Fig. 9: Removing/Installing SAS Unit
Courtesy of MAZDA MOTORS CORP.
Installation
To install, reverse removal procedure. Position SAS unit and bracket with arrow toward front of vehicle.
Tighten fasteners to specification. See TORQUE SPECIFICATIONS
. After SAS unit is installed, activate air
bag system. See DISABLING & ACTIVATING AIR BAG SYSTEM
. Check AIR BAG warning light to
ensure system is functioning properly. See SYSTEM OPERATION CHECK
.
AIR BAG SYSTEM DEPLOYMENT AUTHORIZATION NOTE
New SAS units are not input with a deployment approval signal to prevent accidental deployment during
installation and will not operate properly until the signal is input.
1. Install new SAS unit and verify air bag warning light continuously flashes approximately 6 seconds after
ignition is turned on. Turn ignition to LOCK position and then back to ON position while warning light is
flashing.
2. Air bag warning light should illuminate and then go out after approximately 6 seconds. If warning light
does not go out, repeat procedure.

1997 Mazda MX-5 Miata
AIR BAG RESTRAINT SYSTEM 1997 ACCESSORIES/SAFETY EQUIPMENT Mazda - Air Bag Restraint System
Microsoft
Sunday, July 05, 2009 1:40:47 PMPage 14 © 2005 Mitchell Repair Information Company, LLC.

4. Disconnect SAS unit connector. Check wiring between terminal K of SAS unit connector and terminal C
of passenger-side air bag module connector for short to ground, short to power or open circuit. If wiring
is OK, replace SAS unit. See SAS UNIT
under REMOVAL & INSTALLATION. If wiring is not OK,
replace wiring harness between passenger-side air bag module and SAS unit. Perform SYSTEM
OPERATION CHECK .
WIRE REPAIR
DO NOT repair air bag system wiring. If a problem is found with air bag system wiring, replace faulty wiring.
TORQUE SPECIFICATIONS
TORQUE SPECIFICATIONS
WIRING DIAGRAM
ApplicationFt. Lbs. (N.m)
Passenger-Side Air Bag Module Retaining Bolts13-20 (18-27)
Steering Wheel Nut29-36 (39-49)
INCH Lbs. (N.m)
Driver-Side Air Bag Module Retaining Nuts35-52 (4.0-5.8)
SAS Unit Retaining Nuts61-86 (6.7-9.8)

1997 Mazda MX-5 Miata
AIR BAG RESTRAINT SYSTEM 1997 ACCESSORIES/SAFETY EQUIPMENT Mazda - Air Bag Restraint System
Microsoft
Sunday, July 05, 2009 1:40:48 PMPage 19 © 2005 Mitchell Repair Information Company, LLC.

2. Disconnect ABS control module electrical connector. Remove ABS control module mounting bolts/nuts.
Remove ABS control module. To install, reverse removal procedure. Tighten ABS control module
mounting bolts/nuts to 61-87 INCH lbs. (6.9-9.8 N.m).
HYDRAULIC UNIT
Removal & Installation
1. Disconnect negative battery cable. Disconnect hydraulic unit electrical connector. Using Flare Nut
Wrench (49-0259-770B), disconnect brakelines from hydraulic unit. Note location of brakelines for
installation reference. Disconnect electrical connectors. Remove hydraulic unit mounting bolts and nuts.
2. Remove hydraulic unit. To install, reverse removal procedure. Tighten mounting bolts and nuts to
specification. See TORQUE SPECIFICATIONS
. Add fluid and bleed air from system. See
BLEEDING BRAKE SYSTEM
.
FRONT WHEEL SPEED SENSOR ROTOR
Removal
Raise and support vehicle. Remove front wheel assemblies. Remove brake caliper and wire aside. Remove
rotor. Remove grease cap and wheel bearing lock nut. Remove wheel hub. Using Puller (49-0839-425C) and
Attachment (49-F027-007), remove wheel speed sensor rotor from hub.
Installation
To install, reverse removal procedure. Tighten bolts and nuts to specification. See TORQUE
SPECIFICATIONS .
REAR WHEEL SPEED SENSOR ROTOR
Removal
Raise and support vehicle. Remove rear wheel assemblies. Remove brake caliper and wire aside. Remove wheel
bearing lock nut. Remove lower control arm-to-rear steering knuckle bolt and nut. Remove drive axle. DO NOT
disassemble drive axle assembly to remove sensor rotor. Replace drive axle assembly.
Installation
To install, reverse removal procedure. Tighten bolts and nuts to specification. See TORQUE
SPECIFICATIONS .
WHEEL SPEED SENSOR
Removal & Installation
Raise and support vehicle. Remove wheel assemblies. Disconnect wheel speed sensor electrical connector.
Remove wheel speed sensor mounting bolt. Remove wheel speed sensor from vehicle. To install, reverse

1997 Mazda MX-5 Miata
ANTI-LOCK BRAKE SYSTEM 1997 BRAKES Mazda - Anti-Lock
Microsoft
Sunday, July 05, 2009 1:48:49 PMPage 21 © 2005 Mitchell Repair Information Company, LLC.

removal procedure. Tighten mounting bolt to specification. See TORQUE SPECIFICATIONS.
VALVE & MOTOR RELAYS
Removal & Installation
Disconnect negative battery cable. Remove relay cover from hydraulic unit. Remove valve and motor relays.
See Fig. 14
. To install, reverse removal procedure.
Fig. 14: Locating Valve Relay & Motor Relay

Courtesy of MAZDA MOTORS CORP.
ADJUSTMENTS
MASTER CYLINDER PUSH ROD
1. Before installing master cylinder, measure clearance between master cylinder piston and power brake unit
push rod. Turn adjusting nut on Adjustment Gauge (49-B043-001) clockwise to fully retract gauge rod.
Place adjustment gauge onto power brake unit and tighten mounting nuts to 88-138 INCH lbs. (9.9-15.6
N.m).
2. Using a hand-held vacuum pump, apply 19.7 in. Hg to power brake unit. Turn adjusting gauge nut
counterclockwise until
gauge rod just contacts push rod end of power brake unit. Perform STEP 1. See

1997 Mazda MX-5 Miata
ANTI-LOCK BRAKE SYSTEM 1997 BRAKES Mazda - Anti-Lock
Microsoft
Sunday, July 05, 2009 1:48:49 PMPage 22 © 2005 Mitchell Repair Information Company, LLC.

With engine off, depress pedal a few times to eliminate vacuum. Depress brake pedal by hand and check pedal
free play. See BRAKE PEDAL FREE PLAY SPECIFICATIONS
table. Adjust play by loosening push rod
lock nut. Turn push rod until correct free play is obtained. Tighten push rod lock nut to 18-25 ft. lbs. (24-34
N.m).
BRAKE PEDAL FREE PLAY SPECIFICATIONS
PARKING/EMERGENCY BRAKE
1. Depress brake pedal several times. Pull parking brake lever with a force of 44 lbs. (20 kg). If stroke is 7-9
notches, parking brake is properly adjusted. If stroke is not 7-9 notches, raise and support rear of vehicle.
Release parking brake lever.
2. Rotate cable adjusting nut at lever end of cable, located under console cover, until stroke is within
specification. Ensure rear brakes do not drag. Ensure parking brake warning light illuminates when brake
lever is pulled one notch.
TORQUE SPECIFICATIONS
TORQUE SPECIFICATIONS
WIRING DIAGRAMS
ApplicationIn. (mm)
Miata.16-.28 (4-7)
ApplicationFt. Lbs. (N.m)
Brake Caliper Mounting Bolts37-50 (50-68)
Brakeline Nuts10-16 (14-22)
Hydraulic Unit Brakeline Union Bolts18-26 (24-35)
Hydraulic Unit Mounting Bolts/Nuts14-18 (19-24)
I-Arm-To-Rear Steering Knuckle Bolt (RX7)44-54 (59-73)
Lower Control Arm-To-Rear Steering Knuckle Nut47-54 (64-73)
Push Rod Lock Nut18-25 (24-34)
Stoplight Switch Lock Nut10-13 (14-18)
Wheel Bearing Lock Nut
Front123-159 (167-216)
Rear159-217 (216-294)
Wheel Lug Nuts66-86 (89-117)
Wheel Speed Sensor Mounting Bolt12-16 (16-22)
INCH Lbs. (N.m)
ABS Control Unit Mounting Bolts/Nuts61-87 (6.9-9.8)

1997 Mazda MX-5 Miata
ANTI-LOCK BRAKE SYSTEM 1997 BRAKES Mazda - Anti-Lock
Microsoft
Sunday, July 05, 2009 1:48:49 PMPage 25 © 2005 Mitchell Repair Information Company, LLC.

1. Inspect ATF level and condition. Correct as needed. If fluid level and condition is okay, check line
pressure. See LINE PRESSURE TEST under TESTING in MAZDA NC4A-EL OVERHAUL article.
Follow repair recommendations if line pressure is not within specifications. If line pressure is okay, go to
next step.
2. Inspect lock-up solenoid. See SOLENOID VALVES
under COMPONENT TESTING. Repair as
needed. If solenoid valve is okay, go to next step.
3. Inspect lock-up control valve in valve body. If valve is okay, go to next step.
4. Using an EC-AT tester connected to TCM, ensure that engine speed and turbine speed during TCC lock-
up in 4th gear are the same. If speeds are different, replace torque converter. If speeds are the same, go to
next step.
5. Clear DTC. See CLEARING CODES
. Retrieve DTC. If DTC P0740 is still present, replace TCM. If
code is no longer present and symptom still exists, problem may be caused by intermittent TCC slippage.
Further investigation may be required. See MAZDA NC4A-EL OVERHAUL article.
DTC P0750: 1-2 SHIFT SOLENOID MALFUNCTION
Possible Causes:
Short or open circuit between TCM and solenoid.
TCM malfunction.
Shift solenoid malfunction.
Diagnosis & Repair Procedure
1. Ensure all connections are clean and tight. Repair as needed. Turn ignition on. Access TCM connectors.
Using voltmeter, backprobe harness connectors. DO NOT disconnect connectors. Go to next step.
2. Measure voltage between ground and terminal No. 2E (Blue/Yellow wire) on TCM connector. During
test drive, voltage should be less than one volt when solenoid is off and battery voltage when solenoid is
on. See SOLENOID OPERATION
table under TCM OUTPUT DEVICES. If voltage is within
specification, go to step 5 . If voltage is not within specification, go to next step.
3. Turn ignition off. Disconnect TCM harness connector. Measure resistance between ground and terminal
No. 2E. If resistance is 13-27 ohms at 68°F (20°C), go to step 5 . If resistance is not 13-27 ohms at 68°F
(20°C), go to next step.
4. Inspect 1-2 shift solenoid and related circuits. See SOLENOID VALVES
under COMPONENT
TESTING. Repair as needed. If solenoid valve and related circuits are okay, go to next step.
5. Clear DTC and road test vehicle. Retrieve DTC. If DTC P0750 is still present, replace TCM. If code is no
longer present, system is okay.
DTC P0755: 2-3 SHIFT SOLENOID MALFUNCTION
Possible Causes:
Short or open circuit between TCM and solenoid.
TCM malfunction.

1997 Mazda MX-5 Miata
1997 AUTOMATIC TRANSMISSIONS NC4A-EL Electronic Controls
Microsoft
Sunday, July 05, 2009 1:35:04 PMPage 16 © 2005 Mitchell Repair Information Company, LLC.

Condition
Vehicle speed sensor signal is not input to TCM. Possible causes are:
Vehicle speed sensor malfunction.
Vehicle speedometer sensor malfunction.
Damaged circuits or connectors between sensors and TCM.
Diagnosis & Repair Procedure
1. Ensure all connections are clean and tight. Repair as needed. Turn ignition on. Using voltmeter,
backprobe TCM harness connector. DO NOT disconnect connector. Test drive vehicle.
2. Measure voltage between ground and terminal No. 1P (Green/Red wire) on TCM harness connector.
During test drive voltage should be about 4 volts. When parked, voltage should be less than 1.5 or 7-9
volts. If voltage is within specifications, go to step 5 . If voltage is not within specifications, go to next
step.
3. Turn ignition off. Disconnect negative battery cable. Remove instrument cluster. Disconnect TCM
harness connectors. Ensure continuity exists on Green/Red wire between terminal No. 1P on TCM
connector and terminal No. 2F on instrument cluster harness left connector. Repair as needed. If
continuity exists, go to next step.
4. With combination meter removed, measure voltage between terminals No. 2F and 2D on combination
meter connector using analog voltmeter. Raise and support vehicle. Rotate rear wheels. If voltage pulse is
present, go to next step. If voltage pulse is not present, inspect speedometer cable. Replace as needed. If
cable is okay, replace combination meter or circuit board (as applicable).
5. Clear codes and road test vehicle. Retrieve DTC. If DTC 1720 is still present, replace TCM. If code is no
longer present, problem may be caused by poor connection. Repair as needed.
DTC P1743: TORQUE CONVERTER CLUTCH (TCC) SOLENOID MALFUNCTION
Possible Causes:
Short or open circuit between TCM and solenoid.
TCM malfunction.
Lock-up solenoid malfunction.
Diagnosis & Repair Procedure
1. Ensure all connections are clean and tight. Repair as needed. Turn ignition on. Access TCM connectors.
Using voltmeter, backprobe harness connectors. DO NOT disconnect connectors. Go to next step.
2. Measure voltage between ground and terminal No. 2K (Yellow/Black wire). Battery voltage should be
present with solenoid on and zero volts with solenoid off. If voltage is within specifications, go to step 5 .
If voltage is not within specifications, go to next step.
3. Turn ignition off. Disconnect TCM harness connector. Measure resistance between ground and terminal
No. 2K. If resistance is 13-25 ohms at 68°F (20°C), go to step 5 . If resistance is not 13-25 ohms at 68°F
(20°C),
go to next step.

1997 Mazda MX-5 Miata
1997 AUTOMATIC TRANSMISSIONS NC4A-EL Electronic Controls
Microsoft
Sunday, July 05, 2009 1:35:04 PMPage 18 © 2005 Mitchell Repair Information Company, LLC.