1990 MITSUBISHI SPYDER check engine

ENGINE (TURBO)
AND ENGINE>
Check itemIgnition power transistorCheck (Engine Normal
Engine: 3,000 .
Ignition power transistor
Terminal No.
Engine
Terminal
No.
Engine>
10 10
23 23
11
12
Turbocharger waste gate Ignition switch: ON
solenoid
Engine: Idle premium
gasoline is used)
Power supply Ignition switch: ON
2525
Boost meter
Ignition switch: ON
l Engine: IdleFrom depress the accelerator drops
16
19
19Volume air flow sensor re- Engine: IdleQ - l
set signal
Engine:6-9
Fan motor relay (High)Radiator fan is not operating [Engine
coolant
2020
21
22
33
.
Radiator fan is operating at high
s p e e d [ E n g i n e
i s
Fan motor relay (Low)Radiator fan is not operating [Engine temperature
Radiator. fan is operating at low
speed [Engine coolant temperature
is
or more]
A/C compressor clutch
l Engine: Idle or
relaylA/C switch: OFF ON 6 or more i s o p e r a t i n g ) , as A/C clutch
cycles
2 1
22
33
ine: idle after I OFF) . . A Ndrops
II. .
Generator terminal
l
36Ignition switch: OFF ON
lamp(after several seconds
have passed)
pressureEngine: Warm,W h e n s t e e r i n g
idlewheel is station-
ary
When steering
wheel is turned
37
relay (Power supply) Ignition switch: OFF
Ignition switch: ON
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ENGINE (TURBO)
AND ENGINE> Troubleshooting
TerminalCheck itemCheck condition (Engine condition) c o n d i t i o n
No.
Engine>
Terminal
No.
Engine
41 41Generator Terminall Engine: idle after warm-up (radia-
tor fan: OFF)
l Headlight: OFF ONl switch: OFF l Stop lamp: OFF ON
A/C refrigerant A/C refrigerant1 , 3 7 3
ate pressure switch
pressurepsi) or less
pressure side)
1,863 (270
psi) or more
Engine/transaxle general
control torque reduction
request signal 2 Engine: Idle
During driving and
after engine warming up
Engine: Idle
Turn the A/C
,
switch OFF
switch ON (A/C
compressor is
operating)
Engine: Idle at the coolant b - l
ture of or lower
Engine: Warm, idle
Engine: Warm, idle
Engine: 5,000
the at a constant speed
Engine: 3,000
Warm, idle
Engine: 5,000
Engine: Idle
I
Engine: CrankingIor more
Ignition switch:
ON When intake air
t e m p e r a t u r e i s
When intake air 2.3-2.9
t e m p e r a t u r e i s
When intake air
temperature is
When intake air
t e m p e r a t u r e i s
.
42
4343
A/C switch45
46Engine/transaxle general
control torque execution
signal
Heated oxygen
heater (Rear)
55Evaporative emission
ventilation solenoid
58Engine ignition signal
Heated oxygen sensor
heater (Front)
60
61Fuel tank differential pres-
sure sensor
71Ignition switch-ST
Intake air temperature
sensor
‘272
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ENGINE (TURBO)
AND
ENGINE>
Terminal TerminalCheck itemCheck condition (Engine
No. No.
Engine Engine>
7373Manifold differential Engine: Idle
sure sensorl Engine: Idle‘rises from l Suddenly depress the accelerator suddenlypedal
75
75 Heated oxygen sensorl T r a n s a x l e : range
(Rear)l Driving with the throttle widely
3,500 or more
76
76Heated oxygen sensor Engine: Warm, 2,500 0
(Front)(Use a digital-type voltmeter)(repeats)
Backup power supply Ignition switch: OFF
81Sensor impressed voltage Ignition switch: ON4.5-5.5
92IgnitionIgnition switch: ON
3383 Engine coolant Ignition switch:When engine3.2-3.8
ture sensorONcoolant tempera-_
ture is
When engine2.3-2.9
coolant tempera-
ture is
F)
When engine
coolant tempera-
ture is
When engine
coolant tempera-
ture is
1484Throttle position sensor Ignition switch:Idle
ON (Check for
smooth voltage increase as
throttle valve is Wide open
4.5-5.5
moved from idlethrottle valve
position to wide
open throttle.)
85Barometric pressure Ignition switch: When altitude is3.7-4.3
sorON0 (0 ft.)
When altitude is
3.2-3.8
1,260 (3937
86Vehicle speed sensorl Ignition switch: ON 0l Move the vehicle slowly forward (repeats)
Revision

ENGINE (TURBO)
AND
ENGINE> Troubleshooting
Terminal TerminalCheck itemCheck condition (Engine condition) Normal
No. No.
Engine Engine>. .
87Closed throttle position Ignition switch:Set throttle O-l
switchONto idle position
Slightly open 4
or more
throttle valve
88 88Camshaft position sensor
Engine: Cranking. . --
8989
90 90
9191
Engine: Idle
Crankshaft position Engine: Cranking
sor Engine: Idle
Volume air flow sensor Engine: Idle 2 . 2 - 3 . 2
Engine: 2,500 __
Park/Neutral positionIgnition switch: s e l e c t o r
switchONto or
S e t - s e l e c t o r l e v e r . 8 - 1 4 .
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ENGINE (TURBO)
AND ENGINE>
TERMINAL RESISTANCE
1. Turn the ignition switch off.
2. Disconnect the ECM connector.
3.Measure the resistance and check for continuity bet ween
the terminals of theECM
referring to the check
NOTE
1.When measuring resistance and checking continuity’
a harness for checking contact pin pressure should’
be used instead of inserting a test probe.
2.Checks do not have to be carried in the
given in this chart.,
Caution
If resistance or continuity performed on
the wrong terminals, damage to the vehicle wiring,
sensors,
and/or ohmmeter may occur.
Use care to prevent this!
4. If the ohmmeter shows
from the normal
condition, check the corresponding sensor, actuator and
related electrical wiring, and then repair or replace.
5. After repair or replacement, recheck with the oh mmeter
to confirm that the repair or replacement
corrected
the problem.
Harness Side Connector Terminal Arrangement
Terminal No. item Normal condition (Check condition)
No. 1 injector2-3 [At Engine (Turbo)>
No. 2 injector13-16 [At Engine>
14-12
2 - 1 2
No. 3 injector
15-12No. 4 injector
3 - 1 2Fuel pressure solenoid36-44 [At
4 - 1 2Stepper motor coil (Al) Engine (Turbo)>28-33 [At
17-12Stepper motor coil Engine (Turbo)>
5 - 1 2Stepper motor coil Engine (Turbo)>
18-12Stepper motor coil Engine (Turbo)>
4-17 motor Engine> Continuity
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ENGINE (TURBO)
AND ENGINE> Troubleshooting
Terminal’ No.
6 - 1 2
9 - 1 2 11-12
ground
ground
54-12
55-12
72-92
17-92
-Body
Inspection item
EGR solenoid Normal condition (Check condition)
36-44 [At
Evaporative emission purge solenoid
Turbocharger waste gate solenoid
Engine (Turbo)>
36-44 [At
36-44 [At
E C M g r o u n dContinuity
ECM ground
Heated oxygen sensor heater (rear)
Evaporative emission
solenoid Approx. 12
[At
36-44 [At
Heated oxygen sensor heater (front) Approx. 12 [At
Intake air temperature sensor5.3-6.7 intake air temperature is
[When intake air temperature is
1 1.5 intake air temperature is
Engine coolant temperature sensor
intake is
.
[When temperature is
[When coolant temperature is
1.3 [When coolant
coolant temperature is
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Closed throttle position switch
Continuity (when throttle valve is at idle position
)
No continuity (when throttle valve
slightly
Park/Neutral position switch Continuity (when select lever is at or N)
No continuity (when lever is at 2, or

ENGINE (TURBO)
AND ENGINE> Troubleshooting . .
Observation conditions (pattern changes with engine changes.)
.
id
10--
0Time
Wave pattern observation points
Check to be sure that cycle time becomes shorter and the frequency increases when speed
is increased.
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Examples of abnormal wave patterns
l Example 1
,Cause of problem
Sensor interface malfunction
Wave pattern characteristics
Rectangular wave pattern is output even when the en gine
is not started.
l Example 2
Cause of problem
Damaged rectifier or vortex generation column .
Wave pattern characteristics
Unstable wave pattern with non-uniform frequency. H ow-
ever, when an ignition leak occurs during acceleration,
the wave pattern will be distorted temporarily, eve n if
the volume air flow sensor is normal.

ENGINE (TURBO)
AND ENGINE>
CAMSHAFT POSITION SENSOR AND
POSITION SENSOR
Measurement method
1.Connect the analyzer special patterns pickup to
position sensor terminal 2.
2.Disconnect the crankshaft position sensor
connect the special tool (test harness: in.
between.
3.Connect the analyzer special patterns pickup to cra nkshaft
position sensor terminal 2.
Alternate method (Test harness not available)
1. Connect the analyzer special patterns pickup. to ECM
terminal 88. (When checking the camshaft position sensor.
signal wave pattern)
2. Connect the analyzer special patterns pickup to ECM’
terminal 89. (When checking the crankshaft position sen-
sor signal wave pattern)
Standard Wave Pattern
Observation conditions
Camshaft position sensor
connector
Standard wave pattern
Crankshaft
Crankshaft
position sensor
position sensor
output wave
output wave
pattern
pattern
Camshaft position
Camshaft position
sensor output
sensor output
wave pattern
wave pattern
Special patterns
Pattern height LowI
Pattern selector DisplayI
Engine
I
TDC: Top dead centerNo. TDCNo. TDC No. TDCNo. TDC
Wave Pattern Observation Points
Check that cycle time
becomes shorter when the engine speed increases.
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