1990 MITSUBISHI SPYDER coolant temperature

ENGINE (TURBO)
ENGINE>
Code No. Misfire Detected (Cylin-
der-l,
[Comment]Background
lif a misfiring occurs while the engine is running, the engine speed suddenly changes.
l The engine control module checks for changes in the engine speed.
Check Areal 5 or more have passed after the engine was started.l Engine speed is at between 500 and 6000 l Engine coolant temperature is or higher.
l Intake air temperature is or higher
l Barometric pressure is 76 (11 psi.) or higher.
l Running free from sudden accelerations/deceleration s such as shift change.
Judgement Criteria(change in the angular acceleration of the crankshaft is used for misfire detection.)lMisfire has occurred more frequently than allowed during the last 200 revolutions [when
the catalyst temperature is higher than
or l Misfire has occurred in 20 or more of the last 1000 revolutions (corresponding to 1.5
times the limit of emission standard.)
l l Low compression l Injector failed
l Engine
Check the injector (Refer
OK
Replace
Check the following connectors: __ Repair,OK
[Check the harness wire between the ECM and the inj ectorNG ,
connector
Check the following items.
l Check the spark plugs, spark plug cables.
l Check the compression pressure
Code No. Knock Sensor 1 Circuit Malfunction
Engine (Turbo)>
l sensor failed BackgroundlThe knock sensor converts the vibration of the cyli nder block into a voltage and outputs
it. If there is a malfunction of the knock sensor, the voltage output will not change.
l The engine control module checks whether the voltag e output changes.
Check Areal Ignition switch: ONl60 or more have passed after the ignition switch was turned on or the starting sequencewasl Engine speed is higher than 2000
Judgement CriterialKnock sensor output voltage (knock sensor peak volt age in each deg period of the
crankshaft) has not changed more than 0.06 in the last consecutive 200 periods.
lOpen or shorted knock sensor circuit, or connector
l Engine control module failed
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ENGINE (TURBO)
AND ENGINE> Troubleshooting
Code No. Exhaust Gas Recirculation Flow MalfunctionProbable
[Comment]l EGR valve does not openBackgroundl EGR control vacuum is too lowlWhen the EGR solenoid switches from OFF to ON while the engine is running, EGRl EGR solenoid failedgas flows.lOpen or shorted EGR solenoid circuit, or l The engine control module checks how the EGR gas fl ow signal changes.connector
Check Areal Manifold differential pressure sensor failed
l Engine coolant temperature is higher than l Engine control failedl Engine speed is between 1000 and 2000 l Engine speed is between 940 and 2000 .
l Intake air temperature is
or higher.
l Barometric pressure is 76 (11 psi.) or higher.
l Closed throttle position switch: ON
l Volumetric efficiency is 15%
or 27% or lower. engine l Volumetric efficiency is 15% or 20% or lower. engine>
l Monitoring Time: 2
Judgement Criterial There is no change in the condition of the air inta ke system when the EGR solenoid
is turned on.
l Monitored only once per trip.
Check the EGR system (Refer to GROUP 17 Emission Control(Refer to GROUP 17 Emission System) Engine EGR solenoid
(Refer to GROUP 17 Emission Control System)
OK
Replace,
Check the following items.
l Vacuum hoses
l EGR
vacuum7
l EGR valve
Check the manifold differential pressure sensor malfunction95 Manifold differential pressure sensor (Refer to (Refer to INSPECTION PROCEDURE FOR TROUBLE CODE
Check for EGR valve and EGR line blockages, and cle an if
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ENGINE (TURBO)
AND ENGINE> Troubleshooting
Code No. Evaporative Emission Control System
Malfunction
Engine (Turbo)>
Probable cause
[Comment]l purge . . .
BackgroundlOpen or shorted evaporative lThe evaporative emission purge solenoid opens and while the engine is idling. l o o s e Then the fuel compensation value changes according to whether the evaporative emissioncanister emits purge air or not. l connection l l
The engine control module checks for this change.
l .
Check Area l
Engine control module
l 3 min or more have passed after the sequence was completed. ,
l Engine coolant temperature is higher than l Power steering switch: OFFl Under the closed loop air-fuel ratio control.l Under the close loop idle speed control
.l Monitoring 3
Judgement CriterialThere is a small amount of variation (3% or less) inthe short-term fuel compensation
value (average value) when the EVAP purge solenoid is turned on.
Check the evaporative emission purge system (Refer to GROUP17 Emission Control System)
Check the purge port vacuum.
Check the vapor hose between the fuel tank and the evaporative
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ENGINE (TURBO)
AND ENGINE> Troubleshooting
Code No. Evaporative Emission System
Detected Malfunction Engine>Probable cause
[Comment]lImproper tightening of fuel tank filler tube cap
Backgroundl Fuel vent valve failedlThe engine control module turns the evaporative emi ssion ventilation solenoid on in order Purge line or to shut off the outside air of the evaporative emission canister.lBroken seal in fuel purge line or vaporNext, the evaporative emission purge solenoid is driven at the specified duty (approximately
line25%) to generate a negative pressure in the fuel ta nk and purge line, etc.
l Evaporative emission, purge solenoid failedWhen a negative pressure is generated in the fuel t ank and purge line, etc., the evaporativeemission purge solenoid turns off and the fuel tank and purge line, etc. are sealed.l
Evaporative solenoidfailed,
After they are sealed, monitoring of pressure diffe rences inside the fuel tank starts, andlFuel tank differential failed
if there is a large drop in pressure over a given t ime (if the negative pressure is leakinglEngine coolant temperature sesnor failedout into the atmosphere and the pressure has approa ched barometric pressure), the enginel Intake air temperature sensor failed
control module judges that there is a leak in the f uel tank, purge line or vapor line.
l Power steering pressure switch failed
Furthermore, if the fuel tank internal pressure doe s not drop even if the evaporative emission Incorrect fuel used
purge solenoid is driven while the outside air of the canister is shut off (becauseof a blockage in the purge line or because the fuel tank filler tube cap has not been
tightened correctly), the engine control module jud ges that there is a problem with the
system and the check engine/malfunction indicator l amp illuminates.
Check Area
l Engine coolant is not lower than Engine speed is at between 1600 3500 l Power steering pressure switch: OFF Ambient pressure is not lower than 76 (11.0 psi). Volumetric efficiency: 20 Intake air temperature is not lower than Pressure increase when evaporative emission purge s olenoid and evaporative emission
ventilation solenoid are closed is 50 or less. Pressure variation range is 66 or less. Monitoring time: 50 100 sec.
CriteriaInternal pressure of the fuel tank has not changed more than 100 in 20 after
the tank and vapor line were closed. .
Check if the fuel tank filler tube cap is attached correctly.
OK
NG
N G
Attach correctly.
Repair or replace
OK
SCAN TOOL Actuator test
06 Evaporative emission purge solenoid (Refer to
OK
Check the evaporative emission control system purge control valvecircuit malfunction (Refer to INSPECTION DURE FOR DIAGNOSTIC TROUBLE CODE
NGSCAN TOOL Actuator test29 Evaporative emission ventilation solenoid (Refer to
OK
Check the evaporative emission control system vent control function (Refer to INSPECTION PROCEDURE FOR
DIAGNOSTIC TROUBLE CODE
SCAN TOOL Data listN G
73 Fuel tank differential pressure sensor (Refer to Check the evaporative emission control system pres sure sensor
DIAGNOSTIC TROUBLE CODE
SCAN TOOL Data list
21 Engine coolant temperature sensor (Refer to Check the engine coolant temperature sensor circuit malfunction
OKTIC TROUBLE CODE
SCAN TOOL listN G
13 Intake air temperature sensor (Refer to
OK
Check the intake air temperature sensor circuit mal function (Referto INSPECTION PROCEDURE DIAGNOSTIC
TROUBLE CODE
27 Power steering pressure switch (Refer to
OK
Check the power steering pressure sensor circuit r ange/perfor-
mance (Refer to INSPECTION PROCEDURE FORDIAGNOSTIC TROUBLE CODE
l Check for contamination (water, kerosene, etc.) in the fuel.
have failed. [Refer to the Emission Diagnosis Manua l (Pub.
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ENGINE (TURBO)
AND. ENGINE> Troubleshooting
Code No. Idle Control System Malfunction ,
[Comment]l Idle air control motor failedBackgroundlOpen or shorted idle-air control l If there is a malfunction of the system, the actual engine speed will not be identi calto the target engine speed.
l , Engine control l The engine control module checks the difference bet ween the actual engine speed andthe target engine speed.
Check Area, Judgement Criteria
1. Check Areal Under the closed loop idle speed control. , . .Judgement CriteriaActual idle speed has continued to be higher than t
he target idle speed by 300 or more for 10 sec.
2. Check Area
l During idle speed closed loop control.
l The maximum outside air temperature during the last operation was
or more. . .
l Engine coolant temperature is approximately or higher.l System voltage is 10 or higher.l Intake air temperature is or higherl Barometric pressure is 76 (11 psi.) or higher.
Judgement Criteria,
l Actual idle speed is higher than the target idle sp eed by 200 or more for 10seconds.
3 . Check Areal During idle closed loop control.l Power switch is off. Volumetric efficiency is 40% or less.
l Intake air temperature is or higherl is 76 (11 psi.) or higher.
Judgement Criteria
Disconnect the connector and measure at the harness
l Voltage between 2 and ground, and 5 and ground
Check the Repair
lDisconnect the connector, measure at the harness si de.l Voltage between each of 4, 5, 17, 16 and ground
(Ignition switch: ON)
OK: Battery positive voltage
.
Repair
.
.
Check trouble symptom.
NG
Check harness wire between ECM and idle air control motor connectorRepair, if necessary.
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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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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
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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