check engine MITSUBISHI SPYDER 1990 Service Repair Manual

ENGINE (NON-TURBO)>
Scan tool 33
General scan tool is Too LongP r o b a b l e
[Comment]
Backgroundl Thermostat fully
l When the engine is started, the engine coolant temp erature The PCM checksl
Engine temperature sensor failedlthat the engine coolant rises the specified value within a sufficient period aft er theEngine coolant temperature
engine is started. improperly connected
l PCM failed
Range of Check
l Vehicle speed: More than 28 mph
l
minutes after starting engine
Set Condition
lEngine coolant temperature does not rise to 71 ,
Replace
(Refer to Replace
Repair
.
NG Repairtemperature sensor connector.
OK
Replace the PCM.
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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 (NON-TURBO)>
SCAN SENSOR READ TEST list)
65 Vehicle speed sensor
l Is vehicle speed displayed during driving?
No
Check the following
OK
Check trouble symptom.
OK
harness wire module connector.
OK
Yes R e p l a c e t h e P C M .
N G Repair
NG Repair
Check the automatic transaxle control system.
Code General scan tool
No.MAP Sensor Voltage Too Low
14
[Comment]Background
lWhen this code is produced, the MAP sensor voltage has fallen below the minimum accept-able voltage of 0.02 volts.lAs in the situation above, the estimates MAP value to allow the engine to run.
Range of Check
l Engine:
l position sensor output voltage: Less than Set ConditionlMAP sensor output voltage remains less than for 2 seconds.
Probable cause
Open supply circuit Signal circuit shorted to ground Sensor l PCM failed
Measure at the MAP sensor connector lDisconnect the connector, and measure at the harness side.l Voltage between 2 and ground
(Ignition switch: ON)
O K :
OKCheck the harness wire between the PCM and MAP sens or
connector Repair, if
NGCheck the following Repair
OK
Check trouble symptom.
N G NG
Check the harness wire between the PCM and MAP sens or Repairconnector.
OK
Replace the MAP sensor.
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ENGINE
Scan tool 37 ,
Code General scan tool
No. 08 MAP Sensor Voltage Too HighProbable cause
14
[Comment] Signal circuit openBackground Sensor open lThis code is generated when the MAP sensor voltage
exceeds maximum voltage
of 4.7 volts. l
Sensor ground circuit open
Range of Check l
Sensor circuit shorted to voltage
l PCM
l Engine: 1500 l Throttle position sensor output voltage: Less than Set ConditionlMAP sensor output voltage remains less than 4.7 for 2 seconds. .
Measure at the MAP sensor connector Check the following connectors: lDisconnect the connector, and measure at the harnes
s side.
Check the harness wire between the PCM and MAP se&or
connector. Repair, if necessary. ,
N G
Check the following connectors: Repair
OK
Check trouble symptom.
N G
NG
Repairconnector.
OK
Replace the MAP sensor.
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ENGINE Troubleshooting
General scan toolNo Change in MAP From Start to
[Comment]
Background
l The MAP sensor is mounted to intake manifold vacuum .
lThis information provides an important PCM input fo r determining fuel injector pulse wide.lThe sensor should measure a difference in manifold pressure between key ON and after
the engine is running.
Range of Check
l Vehicle is not moving
l
Engine: The engine idle speed is almost identical t o the target idle speed while the engineis idling.
Set Condition
l Diagnostic trouble code (DTC) memory is not deleted even after the ignition switch is
turned off.
l The difference between the two following MAP values is small.
The value immediately after the ignition switch is turned to ON.
The value while the
is at idle for two seconds.
Ice in sensorl Sensor failedl . failed
Measure at the MAP sensor connector l
Disconnect the connector, and measure at the harnes s side.
l Continuity between and ground.
OK: Continuitv
Check the
Check the harness wire between the PCM and the MAP sensor
connector. if
Check the following connectors: Repair
OK
Check trouble symptom.
N G N G
Check the harness wire between the PCM and the MAP
connector.
OK
.
Replace the MAP sensor.
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ENGINE (NON-TURBO)>
Scan tool 40
Code General scan tool No Crank Reference at
No.PCM
11
[Comment]
Background
lThe crankshaft position sensor is a Hall-effect sensor that provides a voltage signal to
the PCM.
l Voltage alternates between 0 and 5 volts as the cra nkshaft turns.
lThis DTC would indicate a failure of the sensoror its circuit.
Range of Check
l The test is run at start-up.
l Camshaft position sensor indicates that the camshaf t is rotating.
Set Condition
l Crankshaft position sensor signal (High or Low) is not input.
Probable cause
l Open or shorted supply circuit
l Open sensor ground
l Open or shorted signal circuit lExcessive clearance between the sensor androtor Sensor failed l PCM failed
Check the
position sensor.
OK
Measure at the crankshaft position sensor connector lDisconnect the connector, and measure at the harness side.
l Voltage between 1 and ground
(Ignition switch: ON)
O K :
l Continuity between 2 and ground
OK: Continuity
l Voltage between 3 and ground
OK: 4.8-5.2
OK
Check following connectors:
Check the harness wire between the PCM and cranksha ft positionsensor connector.
Replace the PCM.Repair
Check the following
Check trouble symptom.
OK
NG Repair
1
Replace the crankshaft position sensor.
NG
Check trouble symptom.
N G
Replace the PCM.
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ENGINE (NON-TURBO)>
Scan tool 42
Code General scan tool
No.Ignition Coil CircuitP r o b a b l e
43
[Comment]
BackgroundlIgnition coil wiring harness or connectorfailedl The PCM provides the ground control circuit for the side of ignition coil. Open circuit in coill Battery voltage is through the relay (ASD relay). P C M Range of Checkl Battery voltage: 13 or more (engine is running)
l relay (ASD relay): ON
l Engine: 3000 or lessl Engine speed and ignition timing are always stable.
Set Condition
lThe primary circuit is not achieving peak current w ith maximum dwell for 3 seconds.
SCAN TOOL Actuator test 10
relay (ASD relay)
OK: ooeratina sound can be heard.
NG Repair relay (ASD relay) related
OK
Measure at the ignition coil connector lDisconnect the connector, and measure at the harnes s side.
SCAN TOOL Actuator test 10
relay (ASD relay) relay (ASD relay) is turned on and off 1.4 seconds.
l Voltage between 2 and ground
[Measure with
relay (ASD relay) on.]
OK: Battery positive voltage Check the harness wire the (ASD-relay) and
the ignition coil connector. Repair,’ necessary.
NGMeasure at the PCM connector Check the following connector: lDisconnect the connector and measure at the harness side.lDisconnect PCM connector and short terminal (67) of
the harness-side connector to ground.
Voltage between 3 and ground OK: Battery positive voltage
OK
Check the harness wire between PCM and the ignition connector. Repair, if necessary.
Check the following connector:
OK
NG Repair
Check trouble symptom.
Replace the PCM.
N G
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ENGINE (NON-TURBO)> ,
Scan tool 43
Code General scan tool
No.Ignition Coil Primary CircuitP r o b a b l e
43
[Comment]lBackgroundIgnition coil wiring harness orfailedl
The PCM provides the ground control circuit for the primary side of ignition coil. Open circuit in ignition l Battery voltage is supplied through the relay relay).
l PCM failedRange of Check Battery voltage: 13 or more (engine is running)l relay (ASD relay): ON
l Engine: 3000 or less
l Engine speed and ignition timing are always stable.
Set Condition
. .
lThe primary circuit is not achieving peak current w ith maximum dwell for 3 seconds.
SCAN TOOL Actuator test
10 relay (ASD relay)
NG Repair relay (ASD relay) related
OK: Relay operating sound can be heard.
Measure at the ignition coil connector lDisconnect the connector, and measure at the harnes s side.
SCAN TOOL Actuator test 10
relay (ASD relay) relay (ASD relay) is turned on and off every 1.4 s econds.
l Voltage between 2 and ground
[Measure with
relay (ASD relay) on.]
OK: Battery positive voltageCheck the harness wire between the ignition coil connector. if necessary.
Measure at the PCM connector
lDisconnect the connector and measure at the harness side.lDisconnect PCM connector and short terminal (67) of
the harness-side connector to ground.
l Voltage between 2 and ground
OK: Battery positive voltage
OK
Check the harness wire between thePCM andthe ignition coil
connector. Repair, if necessary.
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Check the following connector:
OK
NG Repair
Check trouble symptom.
N G
Replace the PCM.

ENGINE (NON-TURBO)> Troubleshooting
Scan tool 44
C o d eNo relay) output
No.General scan tool V o l t a g e a t P C M
42
[Comment]l relay (ASD output openBackgroundl Fused circuit openlThe PCM senses operation of the relay (ASD relay) by measuring relay voltage.
l relay (ASD reiay) failed .
(If relay turns to ON, voltage is high). l Circuit in faked
.lThis DTC indicates that no voltage is being sensed when the relay (ASD relay) is
being energized.
Range of Check
l Battery voltage: or more ,
l switch: ON
l Unless the engine is cranking
Set Condition
l The relay voltage is low for 1 second.
.
NG Replace
Measure at the
relay (ASD relay) connector lDisconnect the connector and measure at the harness side.
l Voltage between 6 and ground
OK: Battery positive voltage
l Voltage. between 6 and ground
OK: Battery positive voltage
OK
, .
Check the harness wire the relay relay) and,
the fusible link. Repair,
NGCheck the followingconnect Repair
OK
Check trouble symptom.
N G NG
Check the harness wire between the PCM and the relay (ASD Repair
relay) connector.
Check trouble symptom.
the PCM.
NG
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E N G I N E
Scan tool 46
Code General scan toolEGR System Failure c a u s e No.
32
[Comment]Backgroundl EGR valve
l Once per vehicle trip the PCM monitors the EGR syst em fiow rate.. t u b e l harness and lIf the flow rate is above or below the acceptable l
imits, the PCM stores a’ diagnostic
l Vacuum hoses’ failed
trouble code.
Range of Check
l Engine temperature is greater than
l More than three minutes have passed since start-up.
l Engine is between 1952 and 2400.
l MAP voltage is between and 2.70.
l TPS voltage is between 0.6 and
Vehicle speed exceeds 3 mph. Short term fuel compensation value is exhibiting l ess than During air/fuel ratio closed loop control ConditionThe measured change in the short-term fuel compensa tion value shift during the test is
less than 7.4% or greater than 20.5%.
Check the idle running.
l Idle running after warming up
lRemove the vacuum hose from the EGR valve nipple an d plugit.lConnect a hand vacuum pump to the EGR valve nipple, and
apply a 12 (3.5 of vacuum.
OK: Idle speed becomes unstable or the engine stalls.
NG.lCheck the EGR valve and replace if lCheck the EGR tube for and clean or it . .
OK
OK
Repair
Check the EGR solenoid circuit. (Refer to INSPECTIONP R O C E D U R E F O R D I A G N O S T I C T R O U B L E C O D E S
Scan tool 46
Code General scan tool PCM Failure
No.SRI Mile Not Stored
62
Revision
[Comment]lUnsuccessful attempt to update service reminder ind icator (SRI or mileage in the
control module EEPROM.
Replace the PCM.I
Probable cause