1997 MAZDA MX-5 sensor

MOTORS
MOTORS
SENDING UNITS & SENSORS
SENDING UNITS & SENSORS
Key Interlock UnitBehind left side of dash. See Fig. 2 .
SAS UnitBehind center of dash. See Fig. 2 .
Transmission Control Module (TCM)Under left side of dash, near fuse block. See Fig. 2 .
ComponentComponent Location
Blower MotorUnder right side of dash. See Fig. 2 .
Condenser Fan MotorIn front of engine compartment.
Cooling Fan MotorIn front of engine compartment.
Cruise Control ActuatorOn left side of engine compartment.
Fuel PumpIn fuel tank.
Power Antenna MotorIn right front of trunk.
Retractable Headlamp ActuatorsBehind respective headlamp.
Shift Lock ActuatorUnder center console, on base of gear selector.
Windshield Washer MotorOn bottom of washer fluid reservoir.
Windshield Wiper MotorOn right side of firewall.
ComponentComponent Location
ABS Wheel Speed Sensor (Left Front)On back of left front wheel spindle assembly. See Fig. 1 .
ABS Wheel Speed Sensor (Left Rear)On back of left rear wheel hub assembly. See Fig. 3 .
ABS Wheel Speed Sensor (Right Front)On back of right front wheel spindle assembly. See Fig. 1 .
ABS Wheel Speed Sensor (Right Rear)On back of right rear wheel hub assembly. See Fig. 3 .
Brake Fluid Level SensorIn brake fluid reservoir. See Fig. 1 .
Camshaft Position SensorIn center rear of engine compartment. See Fig. 1 .
Crankshaft Position SensorOn front of engine.
EGR Boost SensorOn right side of engine compartment.
EGR Valve Position SensorOn right side center, rear of engine compartment.
EGR Valve Position SensorOn right side center, rear of engine compartment. See Fig. 1 .
Engine Coolant Temperature SensorOn rear of engine. See Fig. 1 .
Fuel Gauge Sender UnitIn fuel tank.
Heated Oxygen Sensor (Front)In rear of engine compartment. See Fig. 1 .
Heated Oxygen Sensor (Rear)On underside of vehicle, on exhaust pipe.
Input/Turbine Speed SensorOn left side of transmission.
Mass Air Flow SensorOn top of air filter housing. See Fig. 1 .
Throttle Position (TP) SensorOn side of throttle body. See Fig. 1 .
Transmission Fluid Temperature SensorOn left side of transmission.

1997 Mazda MX-5 Miata
1997 MAZDA MX-5 Miata
Microsoft
Sunday, July 05, 2009 1:54:00 PMPage 2 © 2005 Mitchell Repair Information Company, LLC.

SOLENOIDS & SOLENOID VALVES
SOLENOIDS & SOLENOID VALVES
SWITCHES
SWITCHES
MISCELLANEOUS
MISCELLANEOUS
Vehicle Speed Sensor (VSS)On speedometer assembly.
Water Temperature Sender UnitOn center of engine. See Fig. 1 .
Washer Fluid Level SensorOn washer fluid reservoir. See Fig. 1 .
ComponentComponent Location
AT Interlock SolenoidIn steering column, near ignition switch. See Fig. 2 .
EC-AT Solenoid ValveOn left side of transmission.
EGR Solenoid Valve (Vacuum)On right side of engine compartment. See Fig. 1 .
EGR Solenoid Valve (Vent)On right side of engine compartment. See Fig. 1 .
Fourth Gear Solenoid ValveOn left side of transmission.
Idle Air Control ValveOn right side, front of engine compartment. See Fig. 1 .
PRC Solenoid ValveOn right side, front of engine. See Fig. 1 .
Purge Solenoid ValveOn right strut tower. See Fig. 1 .
ComponentComponent Location
Back-Up Lamp Switch (M/T)On right side of transmission. See Fig. 1 .
Brake SwitchOn bracket, above brake pedal. See Fig. 2 .
Buckle SwitchOn driver side seat belt buckle. See Fig. 3 .
Clutch Switch (M/T)On bracket, above clutch pedal. See Fig. 2 .
Hold SwitchUnder right side of center console.
Key Reminder SwitchIn steering column, near ignition switch.
Neutral Switch (M/T)On right side of transmission. See Fig. 1 .
Oil Pressure SwitchOn right side of engine. See Fig. 1 .
"P" Range SwitchUnder center console, on base of gear selector.
Parking Brake SwitchOn base of parking brake lever. See Fig. 4 .
Power Steering Pressure SwitchOn power steering pump assembly.
Refrigerant Pressure SwitchIn front of engine compartment, near radiator support. See Fig. 1 .
Starter Interlock Switch (M/T)On bracket, above clutch pedal. See Fig. 2 .
ThermoswitchUnder right side of dash.
Transmission Range SwitchOn left side of transmission.
ComponentComponent Location

1997 Mazda MX-5 Miata
1997 MAZDA MX-5 Miata
Microsoft
Sunday, July 05, 2009 1:54:00 PMPage 3 © 2005 Mitchell Repair Information Company, LLC.

2. Disconnect throttle cable. Remove fuel lines from fuel rail and pressure regulator. Remove throttle body
intake duct housing and throttle body. Remove by-pass air control valve and solenoid valves. Remove
upper intake manifold (if equipped).
3. Remove intake manifold support bracket from underneath manifold. Disconnect injector harness
connectors, and remove injectors/fuel rail assembly. Remove intake manifold and gasket.
Installation
1. Ensure all gasket surfaces are clean and flat. Using NEW gasket, install intake manifold to cylinder head.
Tighten manifold bolts/nuts evenly to specification, starting from center bolt and alternating outward. See
TORQUE SPECIFICATIONS
. Install support bracket underneath intake manifold.
2. Install gasket and upper intake manifold (if equipped). Tighten bolts/nuts evenly to specification,
alternating from top to bottom. See TORQUE SPECIFICATIONS
.
3. To complete installation, reverse removal procedure. Ensure throttle cable has .04-.12" (1-3 mm) free
play. Ensure injectors twist freely and are not cocked in insulator "O" rings. Refill engine with coolant.
EXHAUST MANIFOLD
Removal & Installation
1. Remove air cleaner intake duct from top of radiator/fan assembly (if equipped). Disconnect oxygen
sensor. Remove heat shields. Disconnect down pipe from exhaust manifold. Remove exhaust manifold.
2. To install, reverse removal procedure. Ensure all mating surfaces are clean and flat. Install NEW exhaust
manifold gasket to cylinder head. Tighten manifold bolts evenly to specification, starting from center bolt
and alternating outward. See TORQUE SPECIFICATIONS
.
CYLINDER HEAD
Removal
1. Release residual pressure from fuel system. See FUEL PRESSURE RELEASE & PRIMING . Drain
engine coolant. Note locations and disconnect all necessary electrical connectors, ground wires, vacuum
hoses, fuel hoses, coolant hoses and control cables for cylinder head removal. Plug all fuel hoses to avoid
leakage.
2. Remove spark plug wires from spark plugs. Remove all drive belts. Remove water pump pulley. Remove
timing belt. See TIMING BELT
. Remove camshaft/rocker cover.
3. Remove front exhaust pipe. Remove intake manifold support bracket. Loosen all cylinder head bolts
evenly, in 3 steps, in reverse of tightening sequence. See Fig. 7
. Remove bolts and cylinder head
assembly.
Inspection
Carefully clean carbon and gasket material from all mating surfaces. Clean threads of cylinder head bolts. Use a
tap to clean threads in engine block. Check cylinder head for warpage. Resurface or replace head if it is not
within specification. Check valve train components. Replace or resurface components if they are not within

1997 Mazda MX-5 Miata
1997-98 ENGINES 1.8L 4-Cylinder
Microsoft
Sunday, July 05, 2009 1:55:15 PMPage 10 © 2005 Mitchell Repair Information Company, LLC.

Installation
Insert HLA in original location. To complete installation, reverse removal procedure. Tighten camshaft bearing
caps evenly in sequence to specification. See Fig. 10
or Fig. 11 . See TORQUE SPECIFICATIONS .
CAMSHAFT
Removal
Remove cylinder head cover. Remove timing belt. See TIMING BELT. Remove distributor/camshaft position
sensor. Reference mark camshafts, caps and sprockets, and remove sprockets. Loosen camshaft bearing cap
bolts evenly in 5-6 steps, in sequence. See Fig. 10
or Fig. 11 . Remove camshafts.
Inspection
Check camshaft end play. Check camshaft journal diameters and bearing clearances. Check camshaft lobes for
wear. See CAMSHAFT
under ENGINE SPECIFICATIONS. If any measurement is not within specification,
replace camshaft and/or cylinder head.
Installation
To install, reverse removal procedure. On both camshafts, apply small amount of silicone sealant to contact area
of cylinder head/camshaft seal cover cap. Tighten camshaft bearing cap bolts evenly in sequence to
specification. See Fig. 10
or Fig. 11 . See TORQUE SPECIFICATIONS. NOTE: On Miata, exhaust camshaft has a slot for camshaft position sensor drive. On
Protege, exhaust camshaft has a slot for distributor drive. On all models, match
mark camshafts and sprockets for installation reference.

1997 Mazda MX-5 Miata
1997-98 ENGINES 1.8L 4-Cylinder
Microsoft
Sunday, July 05, 2009 1:55:15 PMPage 16 © 2005 Mitchell Repair Information Company, LLC.

1997-2000 SUSPENSION
Front - Miata
DESCRIPTION
Front suspension is an independent, double wishbone design using upper and lower control arms. A spring over
shock is mounted between lower control arm and upper fender panel. Upper and lower control arms pivot at
crossmember and are connected by ball joints to steering knuckle. A stabilizer bar attaches to each lower control
arm and frame. See Fig. 1
. Upper coil over shock mount plate has been redesigned for 1999-2000. New design
incorporates a urethane bumper and improves ride and cornering.
Fig. 1: Identifying Front Suspension Components

Courtesy of MAZDA MOTORS CORP.
ADJUSTMENTS
WHEEL ALIGNMENT SPECIFICATIONS & PROCEDURES
WHEEL BEARING ADJUSTMENT
Raise and support vehicle. Remove wheel assembly. Remove brake caliper and ABS wheel speed sensor.
Remove rotor. Attach dial indicator to axle hub, and measure bearing play. Check bearing axial play by rocking
hub assembly by hand. Maximum axial play should be .002" (.05 mm). If play exceeds specification, check and
adjust lock nut torque or replace hub and bearing assembly. See TORQUE SPECIFICATIONS
. NOTE: Mazda did not produce 1998 Miata models.
NOTE: See SPECIFICATIONS & PROCEDURES article in WHEEL ALIGNMENT.

1997 Mazda MX-5 Miata
1997-2000 SUSPENSION Front - Miata

1997 Mazda MX-5 Miata
1997-2000 SUSPENSION Front - Miata
Microsoft
Sunday, July 05, 2009 1:38:08 PMPage 1 © 2005 Mitchell Repair Information Company, LLC.
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Sunday, July 05, 2009 1:38:12 PMPage 1 © 2005 Mitchell Repair Information Company, LLC.

INSPECTION
BALL JOINT CHECKING
Lower Ball Joint
Remove lower control arm. See LOWER CONTROL ARM & BALL JOINT under REMOVAL &
INSTALLATION. Rotate ball joint stud 4-5 times. Install Preload Attachment (49-0180-510B) to ball joint
stud. Measure ball joint preload using spring scale. See LOWER BALL JOINT PRELOAD
SPECIFICATIONS table. If preload is not as specified, replace lower ball joint.
LOWER BALL JOINT PRELOAD SPECIFICATIONS
Upper Ball Joint
Remove upper control arm. See UPPER CONTROL ARM & BALL JOINT under REMOVAL &
INSTALLATION. Rotate ball joint stud 4-5 times. Install Preload Attachment (49-0180-510B) to ball joint
stud. Measure ball joint preload using spring scale. See UPPER BALL JOINT PRELOAD
SPECIFICATIONS table. If preload is not as specified, replace upper control arm.
UPPER BALL JOINT PRELOAD SPECIFICATIONS
REMOVAL & INSTALLATION
WHEEL BEARING
Removal
Raise and support vehicle. Remove wheel assembly. Remove brake caliper and ABS wheel speed sensor, and
wire aside. Remove grease cap and axle lock nut. Remove brake rotor. Remove hub and bearing assembly.
Remove wheel speed sensor rotor from hub.
Inspection
ApplicationLbs. (kg)
19971.1-3.3 (0.5-1.5)
1999 & 20000.78-4.29 (0.35-1.95)
ApplicationLbs. (kg)
19970.9-3.9 (0.4-1.8)
1999 & 20000.7-5.0 (0.3-2.3)
NOTE: Refer to illustration during removal and installation. See Fig. 1
.
NOTE: Wheel bearing is not serviceable. If bearing is defective, replace hub and
bearing assembly as a unit.

1997 Mazda MX-5 Miata
1997-2000 SUSPENSION Front - Miata
Microsoft
Sunday, July 05, 2009 1:38:08 PMPage 2 © 2005 Mitchell Repair Information Company, LLC.

Check for damage, excessive wear and signs of bearing seizure. Inspect steering knuckle and hub for cracks,
scoring and rust. Check for damaged dust cover and poor fit with steering knuckle. Replace components as
necessary.
Installation
To install, reverse removal procedure. Adjust wheel bearing preload. See WHEEL BEARING
ADJUSTMENT under ADJUSTMENTS. Stake axle nut.
LOWER CONTROL ARM & BALL JOINT
Removal
1. Raise and support vehicle. Remove wheel assembly. Remove engine splash shield (if equipped). Separate
tie rod end from steering knuckle (as necessary). Remove stabilizer bar from lower control arm.
2. Remove shock lower mounting bolt and separate lower shock from lower control arm. Remove lower
control arm ball joint cotter pin and nut. Separate lower control arm ball joint stud from knuckle using
Puller (49 T028 3A0). Remove lower control arm pivot bolts and remove lower control arm.
Inspection
Check lower control arm for damage or cracks. Check bushings for deterioration and excessive wear. Check
ball joint for excessive wear. Examine dust boot for damage. Replace components as necessary.
Bushing Replacement
Cut or press old bushing from control arm. Coat NEW bushing with paraffin-based oil. Press new bushing into
control arm.
Installation (All Models)
To install, reverse removal procedure. Tighten lower control arm-to-frame bolts to specification with vehicle
resting on ground and suspension unloaded. See TORQUE SPECIFICATIONS
.
UPPER CONTROL ARM & BALL JOINT
Removal
Raise and support vehicle. Remove wheel assembly. Remove engine splash shield. Remove wheel speed sensor
harness band. Remove shock lower mounting bolt, and separate lower shock from lower control arm. Remove
upper control arm ball joint cotter pin and nut. Separate upper control arm ball joint stud from knuckle using
Puller (49-0118-850C). Remove upper control arm pivot bolts and remove upper control arm.
Inspection
Check upper control arm for damage or cracks. Check bushings for deterioration and excessive wear. Check
ball joint for excessive wear. Examine dust boot for damage. Replace components as necessary.

1997 Mazda MX-5 Miata
1997-2000 SUSPENSION Front - Miata
Microsoft
Sunday, July 05, 2009 1:38:08 PMPage 3 © 2005 Mitchell Repair Information Company, LLC.

Bushing Replacement
Cut or press old bushing from control arm. Coat new bushing with paraffin-based oil. Press new bushing into
control arm.
Installation (All Models)
To install, reverse removal procedure. Tighten upper control arm pivot bolts to specification with vehicle
resting on ground and suspension unloaded. See TORQUE SPECIFICATIONS
.
SHOCK ASSEMBLY
Removal (1997)
Raise and support vehicle. Remove wheel assembly. Remove engine splash shield. Remove wheel speed sensor
harness band. Remove stabilizer link bolt. Remove upper control arm ball joint cotter pin and nut. Separate
upper control arm ball joint stud from knuckle using Puller (49-0118-850C). Loosen lower control arm pivot
bolts. Remove shock upper mount nuts and lower bolt. Move lower control arm just enough to remove shock
assembly. DO NOT damage brake line.
Removal (1999 & 2000)
Raise and support vehicle. Remove wheel assembly. Remove engine splash shield. Remove wheel speed sensor.
Remove stabilizer link bolt. Separate lower control arm ball joint stud from knuckle using Puller (49-T028-
3A0). Loosen lower control arm pivot bolts. Inside engine compartment, on 1999 models, remove strut bar. See
FRONT STRUT BAR (1999)
. On 2000 models, remove shock upper mount nuts. On all models, under car,
remove lower bolt. Move lower control arm just enough to remove shock assembly. DO NOT damage brake
line.
Disassembly
Clamp upper shock mount in vise. Loosen piston lock nut 2 turns only. Compress coil spring using coil spring
compressor. Remove piston lock nut. Slowly release compressor tension. Remove components. Remove coil
spring. Remove shock from vise.
Inspection
Check shock tube for damage, oil leakage and abnormal noise. Check rubber components for deterioration or
damage. Inspect coil spring for signs of fatigue or damage. Replace components as necessary.
Reassembly (1997)
Clamp shock in vise. Install coil spring and components in reverse order of disassembly. Ensure coil spring is
well seated in upper and lower spring seats. See Fig. 2
. Tighten piston rod nut. See TORQUE
SPECIFICATIONS .

1997 Mazda MX-5 Miata
1997-2000 SUSPENSION Front - Miata
Microsoft
Sunday, July 05, 2009 1:38:08 PMPage 4 © 2005 Mitchell Repair Information Company, LLC.