1990 MITSUBISHI SPYDER coolant temperature

Analyzer
STEPPER MOTOR Engine (Turbo)>
Measurement method
1. Disconnect the stepper motor connector, and connect
the special tool (test harness:
in between.
2. Connect the analyzer special patterns pickup to the step-
per motor-side connector terminal (red clip on the special
tool), terminal 3 (blue clip), terminal 4 (black clip) and
terminal 6 (yellow clip) respectively.
Alternate method (Test
not available) .
1. Connect the analyzer special patterns pickup to ECM
terminal 4, connection terminal 5, connection termi nal
17, and’ connection terminal 18 respectively.
Standard Wave Pattern
Observation conditions
Function Special patterns
Pattern height
Pattern selector
Engine conditionHigh
Display
When the engine coolant temperature is or below,
OFF to ON (without starting the engine)..
While the engine is idling, turn the A/C switch to ON.. .Immediately after starting the warm engine (approx. 1 minute).
Standard wave pattern
The wave patternappears for aninstant, but soon
30disappears.
Stepper motor
10
control signal
wave pattern
Coil reverse voltage(Approx. 3
(Point]
induced voltage from the turning
Time
Revision

SPEED
NOTE
1.The standard idle speed by,
engine speed the
and there should usually for readjustment.
2. The adjustment, after first:
confirming that the spark plugs; the
air control servo, the compression pressure,
all normal.
1.. The vehicle should be prepared as follows before the
i n s p e c t i o n a n d a d j u s t m e n t .
lEngine coolant temperature:
l Lights, cooling fan and accessories: OFF
‘2.
l Transaxle: Neutral (A/T for range)
Connect the scan tool to the data link connector
N O T E
When the scan tool is connected, the diagnostic tes t mode
control terminal should be grounded.
3. Start the engine and run at idle.
4. Select the item No. 30 of the SCAN TOOL (MUT-II)
Actuator test.
NOTE
This holds the motor at the basic step to adjust the
basic idle speed.
5. Check the idle speed. Standard value: 750
50
NOTE
1. The engine speed may be 20 to 100 lower
than indicated above for a new vehicle [driven appr oxi-
mately 500 km (300 mile) or less], but no adjustment
is necessary.
2.If the engine stalls or the is low even though
the vehicle has been driven approximately 500 km (300 mile) or more, it is probable that deposits ar e
adhered to the throttle valve, so clean it. (Refer to

COMPONENT LOCATION
Engine (Turbo)>
Name
Air conditioning compressor clutch relay
Air conditioning switch Camshaft position sensor
Check engine/Malfunction indicator lamp
Crankshaft position sensor Data link connector
EGR solenoid
Engine control module (ECM)
Engine coolant temperature sensor
Evaporative emission purge solenoid
Fuel pressure solenoid
Fuel pump check terminal
Fuel pump relay
Heated oxygen sensor (Front)
Heated oxygen sensor (Rear)
Idle air control motor Ignition coil (Ignition power transistor)
NOTESymbol NameSymbol
A Injector
Knock sensor
Manifold differential pressure (MDP) sensor
fuel injection (MFI) relay
Park/Neutral position switch
Power steering pressure switch
ResistorI.
Throttle position sensor (with
throttle position switch)
Turbocharger waste gate solenoid
Vehicle speed sensor
Volume air flow sensor (with air
temperature sensor and barometric pressure
sensor)
.
The “Name” column is in alphabetical order.

Name
Air conditioning compressor clutch relay
Air conditioning switchSymbol Name
air control motor
coil power transistor)
Camshaft position sensor
Check engine/Malfunction indicator lamp
Crankshaft position sensor
Data link connectorIgnition power transistor
injector
Manifold differential pressure sensor
EGR solenoid fuel relavI I
Engine control module (ECM)
Engine coolant temperature sensorPark/Neutral position switch
Power steering pressure switch
Evaporative emission purge solenoid
Fuel
check terminal
Throttle position sensor (with
throttle position switch)
Fuel pump relay
Fuel pump relay module
Heated oxygen sensor (Front)
Heated oxygen sensor (Rear)Vehicle speed sensor.
Vehicle speed sensor
Volume air flow sensor (with
temperature sensor and barometric pressure
sensor)
NOTE
The “Name” column is in alphabetical order.

COOLANT SENSOR
Caution
Be careful not to touch the tool against the
(resin section) when and
1.Remove engine coolant temperature sensor from the in-,
take manifold.
2.With temperature sensing portion of engine tem-
perature sensor immersed in hot water, check resist ance.
,
Temperature
(32)
20 (66)
40 (104)
60 (176)
Resistance
2.1-2.7
3.If the resistance deviates from the standard value greatly,
replace the sensor.
4. Apply sealant threaded-‘portion. ,
Specified sealant:
NUT locking Part No. 4171 or equivalent,
5. Install engine coolant temperature sensor
it to specified torque.
Sensor tightening torque: 30 Nm (22
6. Fasten harness connectors securely.

RESISTOR CHECK Engine (Turbo)>;
T e r m i n a l s
1. Disconnect the resistor connector.
2. Measure the resistance between terminals.
Measuring terminalsResistance
4-3
5-3
6-3
3.
If the resistance is out of specification, replace the resistor.
ai r
I D L E A I R MO T O R )
CHECK Engine (Turbo
1. Check to be sure that the engine coolant tempera ture
is
or below.
NOTE
Disconnecting the engine coolant temperature sensor
connector and connecting the harness-side of the co nnec-
tor to another engine coolant temperature sensor th at
is at
or below is also okay.
2. Check that the operation sound of the stepper mo tor
can be heard after the ignition is ON (but without
starting the motor), then
3.If the operation sound cannot be heard, check the
motor’s activation circuit.
If the circuit is normal, it is probable that there, is
tion of the stepper of the engine module.

14-2ENGINE COOLING General Information
GENERAL INFORMATION , ,
The cooling system is designed to keep every partthat the heat absorbed by the coolant may be of the engine at appropriate temperature in diated into the air.
er condition the engine may be operated.
The cooling of the water-cooled, pressureThe water pump is of the centrifugal type and is
driven by the
the
forced circulation type in which the water pump crankshaft. .
pressurizes coolant and circulates it throughout th e
engine: If the coolant temperature exceeds the
scribed temperature, the thermostat opens to circu-
late the coolant through the radiator as well so
and is cooled the
CONSTRUCTION DIAGRAM
Engine (Non-turbo)>
Radiator
Radi
.
oil cooler hose and pipe
Engine (Turbo)>
Radiator fan assembly
(Air cooled) oil cooler hose and pipetank
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G e n e r a l
ENGINE COOLING
Engine>
Radiator fan assemblyReserve tank
(Airoilcooler
cooled) oil cooler hose and pipe
SERVICE SPECIFICATIONS
ItemsStandard valueLimit
ThermostatValve opening temperature of Engine (Non-turbo)90.5 (195) thermostat Engine (Turbo) and Engine 82 (180)
Full-opening temperature of Engine (Non-turbo)
102 (216)
thermostat
Engine (Turbo) and Engine95 (203),
Radiator cap valve opening pressure (psi) Engine (Non-turbo)9 4 - 1 2 2 ( 1 4 - 1 8 )
Engine (Turbo) and Engine
LUBRICANT
ItemQuantity
Engine coolant HIGH QUALITY ETHYLENE GLYCOL ANTIFREE ZE COOLANT7.0 (7.4)
SEALANT
ItemSpecified sealant,
Thermostat case Engine (Turbo) and Engine>
Mitsubishi Genuine Parts No. or equivalent:
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