coolant MAZDA MIATA 1991 Factory Service Manual

1990-91 ENGINE COOLING
Cooling System Specifications - MX-5 Miata
COOLING SYSTEM SPECIFICATIONS
COOLING SYSTEM SPECIFICATIONS
ApplicationSpecification
Coolant Replacement Interval30 Months Or 30,000 Miles
Coolant Capacity6.3 qts. (6.0L)
Pressure Cap11-15 psi (0.75-1.05 kg/cm2 )
Thermostat Open Temperature
Starts
Main Valve188-193°F (86.5-89.5°C)
Sub Valve182-188°F (83.5-86.5°C)
Fully Open212°F (100°C)
Thermostat Open Lift
Main Valve0.31" (8 mm)
Sub Valve0.06" (1.5 mm)

1991 Mazda MX-5 Miata
1990-91 ENGINE COOLING Cooling System Specifications - MX-5 Miata

1991 Mazda MX-5 Miata
1990-91 ENGINE COOLING Cooling System Specifications - MX-5 Miata
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CONTROL UNITS LOCATION
SENDING UNITS & SENSORS
SENDING UNITS & SENSORS LOCATION
MOTORS
MOTORS LOCATION
SOLENOIDS & SOLENOID VALVES
SOLENOIDS & SOLENOID VALVES LOCATION
ComponentLocation
ABS Control UnitBehind center of dash, near ECU.
Cruise Control UnitBehind left side of dash, above fuse block.
Engine Control Unit (ECU)Behind center of dash. See Fig. 2 .
Supplemental Safety Restraint (SRS)
ModuleBehind left side of dash. See Fig. 3 .
ComponentLocation
ABS Wheel SensorsOn each front & rear wheel hub
assembly.
Airflow MeterConnected to air filter housing. See Fig.
2 .
Atmospheric Pressure SensorBuilt-in ECU.
Brake Fluid Level SensorInside brake master cylinder.
Coolant Temperature SensorOn water outlet, at left rear of engine. See
Fig. 2
.
Cooling Fan ThermoswitchOn thermostat housing.
Crank Angle SensorOn right rear side of cylinder head. See
Fig. 2
.
Intake Air ThermosensorIn airflow sensor unit.
Oil Pressure SensorOn left side of engine near oil filter.
SRS Crash/Impact Sensors
FrontOn center, left and right front of
vehicle. See Fig. 3
.
CenterBehind center of dash. See Fig. 3 .
Throttle Position Sensor (TPS)Mounted on side of throttle body. See
Fig. 2
.
ComponentLocation
A/C-Heater Blower MotorBehind left side of dash.
Wiper MotorOn right side of firewall.

1991 Mazda MX-5 Miata
ELECTRICAL COMPONENT LOCATOR 1991 MAZDA ELECTRICAL COMPONENTS
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Drain coolant. Disconnect heater hoses at engine compartment firewall. Remove grommets from holes (if
equipped). Remove instrument panel. Remove heater case. Disassemble case and remove heater core. See Fig.
1 . To install, reverse removal procedure. Fill cooling system.
INSTRUMENT PANEL
Removal & Installation
Obtain code number and deactivate audio anti-theft system. Disconnect negative battery cable. Remove all
components in order listed in illustration. See Fig. 3
. To install, reverse removal procedure.
Fig. 3: Exploded View of Instrument Panel

Courtesy of MAZDA MOTORS CORP.
WIRING DIAGRAM

1991 Mazda MX-5 Miata
HEATER SYSTEM 1990-92 Heater Systems
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Fig. 3: Exploded View of Evaporator Case
Courtesy of MAZDA MOTORS CORP.
HEATER CORE
Removal & Installation
Drain coolant. Disconnect heater hoses at engine compartment firewall. Remove grommets from holes (if
equipped). Remove instrument panel. Remove heater case. Disassemble case and remove heater core. See Fig.
1 . To install, reverse removal procedure. Fill cooling system.
INSTRUMENT PANEL

1991 Mazda MX-5 Miata
A/C-HEATER SYSTEM - MANUAL 1990-92 Manual A/C-Heater Systems
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