1990 MITSUBISHI SPYDER brake

ENGINE (NON-TURBO)>
MULTIPORT FUEL INJECTION SYSTEM
Heated oxygen sensor Power supply(Front)l Vehicle speed sensor
Manifold absolute l switch
sure sensor l position Intake air temperature
switch (transaxle rangesensor switch) position sensor Power pressure Camshaft position sensor Crankshaft position sen- l ignitionsor sense) Engine coolant tempera- l Brake switch
ture sensor relay r e l a y ) Knock sensor Heated oxygen sensor(Rear)
Injector l
F u e l Evaporative l fuel purge solenoid Idle air control motor EET
“Evaporative emission l
.l Fan motor l Generator speedometer
light
.
Fuel
canister
absolute pressure sensor
Intake air temperature sensor
Positive crankcase
ventilation valve
I n j e c t o r
transducer
sensor
Engine coolant
Knock sensor
Crankshaft position sensor
Air inlet
Heated oxygen
sensor (Rear)
Revision

ENGINE
I Scan tool 35
Code General scan tool
No.No Vehicle Speed Sensor Signal
15
[Comment]
Background
lThe speed sensor serves as a PCM input switching voltage between 0 and 5volts.lOnce the vehicle is in motion and the throttle is open, information from the sensor is
sampled every 11 milliseconds and compared to a min imum threshold equal to 1 mph.
lIf the sensors output voltage indicates a speed higher than this threshold, the sensor
is considered to be operating normally.
lFailure of the sensor would be quite noticeable bec ause the speedometer would fail tooperate.Diagnostic features that depend on the speed sensor may never execute if this component
fails.
of Check Engine coolant temperature: or more Transaxle: Other than or range only). 31 seconds after starting engine Brakes not applied Throffle valve: Open Engine: 1600 or more Difference between the atmospheric pressure and in take manifold pressure:
34 (10 or more Condition Vehicle speed: Less than lmph for 11 seconds
Measure at the speed sensor connector
l Disconnect the connector, and measure at the harnes s side.
l Voltage between 1 and ground
(Ignition switch: ON)
O K :
l Continuity between 2 and ground
OK: Continuity
OK
OK
Check trouble
Open or shorted. circuitS p e e d o m e t e r d a m a g e d Open supply circuit
Open sensor ground circuit
Vehicle speed sensor failed PCM failed
Repair
Check the harness wire between the PCM and the spee d sensor
connector. Repair, if necessary.
N G Check the following connectors: I Repair
SCAN TOOL SENSOR READ TESTS (Data list)
Replace the vehicle speed sensor.
connector.
N G NG
Repair
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ENGINE Troubleshooting .
Scan tool 138
Code General scan tool
No. Not
25
[Comment]Range of Check
l Engine:
l Vehicle at rest and the brake appliedSet Conditionl speed differs from target idle by 200 for 12 seconds. l
Idle air control motor failed
l motor related circuit .
SCAN TOOL SENSOR READ TESTS (Data list)
12 position (Refer to Check the air control motor. (Refer to
OK
Check the throttle body minimum air flow. (Refer to
Code
No. R e l a y
General scan tool High Speed Radiator Fan Control
[Comment]
Background
lThe high speed radiator fan relay controls the high speed operation of the radiator fan.lOne side of the relay control coil is supplied with 12 volts when the switch is
turned to the ON position.
lThe circuit is completed when the other side of the relay coil is grounded by the PCM.lThe PCM grounds the relay control circuit depending on engine coolant temperature and/or A/C compressor condition, etc.
Range of Check
l Battery voltage: 10
or more
l Ignition switch: ON
Set Condition
lAn open or shorted condition is detected in the hig h speed radiator fan relay control circuitfor 3 seconds.
Probable cause
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l Relay open or l Ignition switch output lLow speed radiator fan relay control circuit
open or shorted
NGMeasure at the PCM connector Check the radiator fan circuit.lDisconnect the connector, and measure at harness side. Voltage between 69 and ground(Ignition switch: ON),.
OK: Battery positive voltage .,
l
Connect a jumper wire between 69 and ground(Ignition switch: ON)
OK: Radiator fan runs at high speed.
OK
Check the following connector: N G Repair
OK
Check trouble symptom.1
NG
Replace the PCM.

ENGINE (NON-TURBO)> Troubleshooting
SENSOR READ TESTS (DATA LIST) REFERENCE TABLE
Caution
1. When shifting the select lever to range, the brakes should be applied so that the
does not move forward.
2. When checking while driving the vehicle, always be sure to have two
vehicle.
Inspection
No.itemInspection contents
Normal conditionp r o c e d u r e
N o .
Engine: WarmWhen at 4000 Air/fuel mixture
engine is suddenly 200 or less
made leaner
decelerated.when
decelerating, and
sensor is made richer
When engine is 1,000
voltswhen racing.
suddenly raced.
(Heated
oxygenEngine: Warm
The heatedsensoroxygen sensor Engine: Idlefront)signal is used to
400 or less to
check the air/fuel
1,000
mixture ratio, and (Changes)
control condition is also checked Engine: 2000
by the PCM.
When engine coolant
t e m p e r a t u r e i s
When engine coolant
t e m p e r a t u r e i s
Engine
coolantIgnition switch: ON When engine coolant
or with engine run- temperature is
ture sensorning
When engine coolant
t e m p e r a t u r e i s
When engine coolant
t e m p e r a t u r e i s
Throttle Set to idle position.
400 or more
position Ignition switch: ON
Open fully 3,800
or less
Minimum
throttle Engine: Idle (more than one minute) 1,000
KnockCode
sor voltsEngine: Idle Sudden racingvoltage increases
temporarily.
0Battery
voltage Ignition switch: ON
101
1
Altitude: Om (0 ft.)
reading
Ignition switch: ON (30Altitude:
(3937 ft.)88 (26
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ENGINE
INPUT STATE TESTS (DATA LIST) REFERENCE TABLE
Item Inspection
No.itemInspection contentsN o r m a l c o n d i t i o n p r o c e d u r e
No.
A l
Power
steering
switch
switch
When steering wheel
is stationaryOFF
Engine: Warm, idle
When steering wheelONis turned,
Transaxle: or
rangeIgnition switch: ON
Other than
or range
BrakeDepress the brake pedalON
switch Do not depress the brake pedal.
(ASD)
voltage OFF
senseIgnition switch: ON
relay (ASD
C o d e N o .
relay)
erationON’checking Engine: Cranking or idle
voltage]
voltage Ignition switch: OFF
OFF
sense
(Ignition
switchSTART, ON voltage)Ignition switch: ON/START
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ENGINE (TURBO)
AND
ENGINE> Troubleshooting
4. Exhaust gas recirculation (EGR) system monitor
Test conditions/procedure
1. All of the following conditions should be satisfied when the drive test is carried out.
(1) Engine coolant temperature:
or higher (when engine is
(2) Outside air temperature: or higher
(3) A/T condition:
lSelector lever position: range
l Overdrive switch: ON
lPower/economy changeover switch: Power
(4) A/C switch:
2. Carry out one trip monitoring according to the f ollowing drive pattern (from starting of engine
until ignition is turned off). (Takes approximately 10 minutes.)’
the engine is fully warmed up, turn the ignition s witch to OFF.
the engine and accelerate to a. speed of between 5 6 64 km/h 40 mph).
Monitoring period: with the engine speed at between 2,000 3,000 and the clutch still
engaged
fully close the -throttle and let the vehicle dece lerate to an engine speed of
900
without applying the brakes.
The steering wheel should not be turned and no ligh ts or accessories be turned on or
off during this time.
to between 56 64 (35 40 mph) and drive at this speed for 20 seconds
or more.
[After the first monitoring (deceleration), an inte rval of 20 seconds or more is necessary before
the next monitoring (deceleration) is made.]
Repeat steps
and ‘4 a total of 8 times.
Decelerate to a stop. After the vehicle has stoppe d, turn the ignition switch to OFF
Drive cycle pattern
60 (40)
Vehicle
speed
32 (20)
NOTE:Throttle
km/h (35 40 mph)
20 seconds
The throttle should not be suddenly closed
or more decelerating.
Engine starts I g n i t i o nswitch:OFF
Fully closed/ Fully closed/ Fully closed/ Fully clo
sed/ Fully Fully closed/
decelerating decelerating decelerating decelerating decelerating decelerating
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Caution
The shaded areas in the graph indicate times when t he vehicle
speed should not go outside of the specified range.

ENGINE (TURBO)
AND ENGINE>
Caution
1. Always apply the brakes when shifting the select or lever to ran&, or vehicle will
forward.
2. Driving tests always need another personnel.
NOTE
In a new vehicle [driven approximately 500 km (300 mile) or less], the volume air sensor output
is sometimes 10 higher than the standard frequency.
The injector drive time represents the time when the cranking speed is at 250 or below when the
supply voltage is 11 V.
In a new vehicle [driven approximately 500 km (300 mile) or less], the injector drive time is sometimes
longer than the standard time.
Fuel is injected into all cylinders simultaneously.
In a new vehicle [driven approximately km (300 mile) or less], the step of the stepper mo tor is sometimes
30 steps greater than the standard value.
If the throttle position sensor voltage rises 100 from the voltage when the engine is at idle and th e
closed throttle position switch turns from on to of f at this time, the sensors are normal. If the throttle position
sensor voltage rises 100
from the voltage when the engine is at idle, the t hrottle valve opens, and the
closed throttle position switch turns from on to of f at this, time, the sensors should be adjusted.
Item Inspection
No.item
Inspection contents Normal contentsInspection
procedure page
11HeatedEngine: WarmWhen at 4000 200 or Code No.
gen sensor engine is suddenly(Air/fuel mixture is 30
(Front)
made leaner
when decelerat- ing, and is made
richer when
When engine is
suddenly raceding.)
Engine: Warm Engine is idling
400 or
(The heated 1,000 ,gen sensor signal(Changes)
is used to check
2,500
the air/fuel mix-
ture ratio.)
Volume airl Engine coolant Engine is idling 22-46 Hz’
flow sensortemperature(4.3-5.3 g/s)
(Mass airl
Lights,electric
flow rate) cooling fan and all Engine
accessories: OFF(Turbo)>
l Transaxle: Neutral Hz
range)(1 g/s)
2,500
Engine is raced
Hz
(9.8-12.1
Engine,
Hz ,
Engine>
Frequency (or air
flow volume) in
creases
re- ,
sponse to racing.
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INTAKE AND EXHAUST Intake Manifold Engine
REMOVAL AND INSTALLATION
Operationl Residual Fuel Pressure Releasing(Refer to GROUP Service.)l Engine Coolant Draining(Refer to GROUP Service.)l Reservoir Assembly Removal with Auto-Cruise
2.9
Post-installation Operationl Reservoir Assembly Installation
l Engine Coolant Supplying (Refer to GROUP Service.)l Accelerator Cable Adjustment (Refer to GROUP 17 On-vehicle Service.)
3.92 . 9
O-ring
Engineoil
Removalsteps
1. Air intake hose2.Breather hose
3. Accelerator cable connection
4. Clip5. MAP sensor connector
6. Charge temperature sensor connector
7. Vacuum hose connection
8.TPS connector9. motor connector 10.
wiring harness11. connection
12. PCV hose assembly 13. Vacuum hose connection14. Brake booster hose
connection
15. pipe connection
16. fuel hose connection
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