MITSUBISHI SPYDER 1990 Service Repair Manual

ENGINE (TURBO)
AND ENGINE> Troubleshooting
Code No. Power Steering Pressure Sensor CircuitProbable cause
[Comment] Power pressure switch Backgroundl Open or shorted power steering pressurelWhen the steering wheel is kept in the position during driving, the power
s w i t c h or steering pressure switch will be momentarily turned off. E n g i n e c o n t r o l f a i l e d ’lThe enginecontrol module checks whetherthe powerste ering pressure switch momentarilyturns off during driving.
Check Area Engine coolant temperature is or higher.
l Driving and stopping ‘2 are repeated times or more.“1: Engine speed is 2,500 or higher, volumetric efficiency is 55% or higher, and this
condition continues for 2 seconds or more.
l 2: Engine speed is 600 or lower.
Judgement Criterial Power steering pressure switch stays on without cha nging.
NGCheck the power steering press On-vehicle Service) Replace
lDisconnect the connector and measure at the harness side.
NG
between ECM and power pressure switch
NG
the ECM. Replace the ECM.
Code No. Transmission Range Sensor Circuit
Malfunction (RPNDL Input)
[Comment]
Background
lWhen a malfunction of the park/neutral position swi tch is detected, the transaxle control
module outputs amalfunction signal to the engine control module.
Check Area, Judgement Criteria l
control module.
Check the TCM. (Refer to GROUP Troubleshooting.)
Repair
Repair
cause
l Park/neutral position switch failedlOpen or shorted park/neutral position switchcircuit, or loose connector.
l Engine control module failed.
Code No. Turbocharger Waste Gate Actuator
Malfunction
(Turbo)> Probable cause
l
Turbocharger waste gateactuator failed.
l Charging pressure control system failed.
l Engine control module failed.[Comment]
Background
lThe engine control module checks that the engine is not overcharged by always monitoringintake air volume.lThe engine control module protects the engine by shutting off fuel when an overcharged
condition is detected.
Check Area
Engine coolant temperature is higher than
Judgement Criterial Volumetric efficiency has continued to be not lower than 200% for 1.5 sec.
Check the turbocharger supercharging. (Refer to GROUP 15
On-vehicle Service.)
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ENGINE (TURBO)
AND
Code No. Turbocharger Waste Gate Solenoid
Malfunction
Engine (Turbo)>
Probable cause
[Comment]l Turbocharger waste gate solenoid BackgroundlThe engine control module checks current flows in t he turbocharger waste gate solenoidl loose connector.
drive circuit when the solenoid is ON and OFF. l Engine control module failed.
Check Areal Battery voltage is not lower than 10 V.
Judgement CriterialSolenoid coil surge voltage (system voltage V) is not detected when the turbochargerwaste gate solenoid is turned on/off.
Check the turbocharger
NG
(Refer to GROUP 15 On-vehicleService.) Replace
OK
Measure at the turbocharger waste gate pressure sol enoidconnectorlDisconnect the connector and measure at the harnessRepair, if necessary.
.
side.l Voltage between 2 and ground (Ignition switch: ON)
OK: Battery positive voltage
Measureat the ECM connector lDisconnect the connectorand measure at the harness
- 1 N G
Check the following con- Repair A-l 00
lVoltage between 11 and ground (Ignition switch: ON)
OK: Battery positive voltageOK
Check trouble symptom.
NG
,
RepairCheck the harness wire between ECM and Repair, if
Check trouble symptom.
N G
[Replace the ECM. ,
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ENGINE (TURBO)
AND ,
Code No. Fuel Pressure Solenoid Malfunction
Engine
BackgroundlThe engine control module checks current flows in the fuel pressure solenoid drive circuitwhen the solenoid is on and off.
Check Area l Battery voltage is not lower than 10 V.
Judgement
lSolenoid coil surge voltage (system voltage 2 V) is not detected when the fuel pressuresolenoid is turned on/off.
Probablecause
l Fuel pressure solenoid lOpen or shorted fuel pressure or loose connector
l E n g i n e
. .
Check the fuel press Replace
OK
Measure at the fuel pressure solenoid connector lDisconnect the connector and measure at the harness
side.
l Voltaae between 1 and (Ignition switch: ON)
. . . . if I
OK: positive voltage.
OK
Check trouble
NG
Check the wire between and Repair, necessary.
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E N G I N E
A N D ,
Code No. Differential
Malfunction
[Comment]BackgroundManifold differential se.
l pressure in the intake manifold. o r l o o s e Engine control. lThe engine control module checks whether the voltage output by manifold differential sure sensor is within a specified range.
Check Area, Judgement Criteria.
1. Check Areal min or more have passed after the engine was start ed.[However, this is only when the engine coolant temperature is or lower
when the engine is started.]
Engine coolant temperature is not lower than Intake air temperature is not lower than Barometric pressure is 76 (11 psi.) or higher. Volumetric efficiency is 30% 55%.
Judgement Criteria . ,
Sensor output voltage has continued to be not lowe
r than [corresponding toan absolute pressure of 118 (17 psi) or higher] for 4 sec.orSensoroutput voltage has continued to be not higher than 0.1 [corresponding to ---
an absolute pressure of 2.4 (0.3 psi) or lower] for 4 sec.
2. Check Area
8 min or more have passed engine Started.
[However, this is only when the engine coolant or lower when the engine is Engine coolant temperature is not lower than Intake air temperature is not lower than Barometric pressure is 76 (11 psi.) or higher. Volumetric efficiency is 30% or lower.
Judgement Criteria ,
l Sensor output voltage is 4.2 or higher for 4 seconds [absolute pressure is 108 (16 psi.) or more]
Check Area 8 min or more have passed after the engine was sta rted.
,
.
. , ,
[However, this is only when the engine coolant temperature is or lowerwhen engine is started.]
l Engine coolant temperature is not lower than .l Intake air temperature is not lower than l Barometric pressure is 76 (11 psi.) or higher. Volumetric efficiency is 70% or higher.
Judgement Criterial Sensor output voltage is or lower for 4 seconds [absolute pressure is 46 (6.7 psi.) or less]I
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ENGINE (TURBO),
AND ENGINE>
Measure at the MDP sensor con-
nector
l test harness: Voltage between 1 and ground(Engine: Idle)
O K :
Voltage between 1 and groundO K : when the
at idle.
NG
OK
Measure at the ECM connector
Connect the connector.Voltage between 73 and ground
O K :
Check the following connector:
Replace the ECM. Measure at the MDP sensor con-
nector
Disconnect the connector, andmeasure at the harness side.Voltage between 3 and ground(Ignition switch: ON)OK:
NG Check the Repair
Check trouble symptom.
Check the following connector:
. . .
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(TURBO)
AND ENGINE> Troubleshooting
Code No. Generator Terminal Circuit Malfunction
[Comment]
Background
lWhen the generator field coil is controlled, the generator terminal inputs a signal to
the engine control module.
lThe engine control module detects the generator out put with the input signal, and controlsthe idle air control motor according to the generator output.
Check Area
l Engine speed is higher than 50
Judgement CriterialInput voltage from the generator terminal has continued to be not lower than 4.5 for 20 sec.
Measure at the generator connector
l Connect the connector.
l Voltage between 4 and ground
Engine: Idle
Radiator fan: stopped
Headlight: off
on
Stop Lamp: off on
Rear defogger switch: off on
OK: voltage drops
NG
Measure at the generator connector lDisconnect the connector, and measure at the harnes s side.
l Voltage between 4 and ground (Ignition switch: ON)
O K :
Probable cause
lOpen circuit in generator terminal circuitl Enginecontrol module failed
,
Replace the ECM.
,
. ,
Check trouble symptom.
NG
NG
Repairbetween theECMand the
OK
connector:
NG Repair
OK
Check trouble symptom. generator
NG
Check the NG Repair Replace the ECM.I
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Replace the generator.1
Code No. Serial Communication Link Malfunction
Probable cause
(with
[Comment]l Automatic transaxle control system Backgroundl Open or short circuit in communication linelThe engine control module receives message signals from the transaxle control modulebetween engine module and transaxlevia the communication line. control module, or poor connector contactlThe engine control module monitors abnormalities in message signals resulting froml
Transaxle control module failed.
a broken communication line or transaxle control mo dule problems.l Engine control module failed.
Check Areal 2 seconds or more have passed since starting was co mpleted.
Judgement CriterialAbnormality in communication line (TCM to ECM) with transaxle control module l Problem with transaxle control module (TCM).

ENGINE
AND ENGINE> Troubleshooting
NGCheck the following connectors: Repair
OK
Check trouble symptom.
NG
NGCheck the harness wire between the the transaxle control Repairmodule connector. ,
OK
There is probably a problem in automatic transaxle control
system. Carry out automatic transaxle troubleshooti ng.
(Refer to GROUP Troubleshooting)
OK
Replace the ECM.
Code No. PG Assy Malfunction
Probable cause
[Comment] Pulse generatorBackgroundl Engine control module failed.lThe transaxle control module monitors the pulse sig nals of the pulse generators and
lWhen the pulse generators “A” and the transaxle control module inputs the pulsegenerator failure signal to the engine control modu le.
Check Area, Judgement Criteria
lPulse generator fail signal is input to the engine control module from the transaxle control
module.
Check the TCM. (Refer to GROUP Troubleshooting.)
Code No. Solenoid Assy Malfunction Probable cause
[Comment]
Background
lThe transaxle control module monitors the torque co nverter clutch solenoid, shift control
solenoid and pressure control solenoid.
lWhen some one of these solenoids has failed, the tr ansaxle control module inputs these
failure signals to the engine control module.
Check Area, Judgement Criteria
lTorque converter clutch solenoid, shift control sol enoid or pressure control solenoid fail
signal is input to the engine control module from t he transaxle control module.
Check the TCM. (Refer to GROUP Troubleshooting.)
l Converter clutch solenoid failed.l Shift control solenoid failed.
l Pressure control solenoid failed.
l Engine control module failed.
Code No. Engine Coolant Temperature Level Input
Circuit
Malfunction
[Comment]
Background
lThe transaxle control module uses the engine coolan t temperature which is input from
the engine control module to carry out shift contro l.
lIf no engine coolant temperature signal is input from the engine control module, the transaxlecontrol module sends a trouble code to the engine c ontrol module.
Check
Judgement Criteria
l Transaxle control module (TCM) communication line t rouble signal (engine coolant
temperature
is not being input from engine control module) is input to the engine
control module (ECM).
Probable cause
lOpen or short circuit in communication linebetween engine control module and control module, or poor connector contactl Transaxle control module l Engine control module failed.
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ENGINE (TURBO)
AND ENGINE>
Check the following connectors: Repair
OK
Check trouble symptom.
module connector.
Replace the
OK
Repair
__
Revision

E N G I N E ( T U R B O )
AND ENGINE>
INSPECTION CHART FOR TROUBLE SYMPTOMS
Trouble symptom
Communication with Communication with all systems is not possible.1
scan tool is impossi-
ble.Communication with ECM only is not possible.2 ,
CheckThe check engine/malfunction indicator lamp does not illuminate right after ‘3
function indicator the ignition switch is turned to the ON position.I,
lamp and related
partsThe check engine/malfunction indicator lamp remains illuminated and never4
goes out.
StartingCranks, won’t start5
Fires up and dies6
Hard starting7
Idling stability
Unstable idle. (Rough idle, hunting)8
[Improper idling)
dling stabilityIdle speed is high. (Improper idle speed). 9
idling)
Idle speed is low. (Improper idle speed)
dling stability When the engine is cold, it stalls a t idle (Die out)11
‘Engine stalls)When the engine becomes hot, it stalls at idle. (Die out)12
The engine stalls when accelerating. (Pass out)13
The engine stalls when decelerating.1 4
Hesitation, sag or stumble15
Acceleration shock16
Deceleration shock17
Poor acceleration18
Surge19
Knocking 20
high CO and HC concentration when idling2 2
output voltage is low (approx. 23
test failed
Transient mass emission tailpipe test failed
Purge flow test for evaporative canister failed
Pressure test for evaporative system failed,
Revision.

ENGINE (TURBO)
AND Troubleshooting
Items
Starting
Idling stabilityWon’t start Fires up and dies
Hard starting
Hunting
Rough idle
Incorrect idle
speed
Engine stall
(Die out)
Engine stall
(Pass out)
Hesitation
Poor acceleration
Stumble
Shock
Surge
Knocking
Run on
Symptom
The starter is usedto crank the engine, but there is no combustion wit hin the
cylinders, and the engine won’t start.
There is combustion within the cylinders, but then the engine
Engine starts after cranking a while.
Engine speed doesn’t remain constant; changes at id le.
Usually, a judgement can be based upon the movement of the tachometer
pointer, and the vibration transmitted to the steer ing wheel,
lever, body,
etc. This is called rough idle.
The engine doesn’t idle at the usual correct speed.
The engine stalls when the foot is taken from the
pedal, regardless
of whether the vehicle is moving or not.
The engine stalls when the accelerator pedal is dep ressed or being
used.
“Hesitation” is the delay in response of the vehicle speed (engine speed) that
occurs when the accelerator is depressed in order t o, accelerate from the
speed at which the vehicle is now traveling, or a drop in
speed (engine speed) during such acceleration.
Serious hesitation is called to
Poor acceleration is inability to obtain an acceleration corresponding to the
degree of throttle opening, even though acceleratio n is smooth, or the
to reach maximum speed.
Engine speed increase is delayed when the pedal is initially
depressed for
to
The feeling of a comparatively large impact or when the engine is
accelerated or decelerated.
This is slight acceleration and deceleration feel u sually at steady, light
throttle cruise. Most notable under light loads.
A sharp sound like a hammer striking the cylinder w alls during driving
which adversely affects driving.
The condition in which the engine continues to run after
ignition switch
turned to OFF. Also called “Dieseling”.
Vehicle
speedHesitation
Hesitation
Time
Vehicle
speed
Idling Stumble
Revision