engine MITSUBISHI SPYDER 1990 Service Repair Manual

ENGINE (NON-TURBO)> Troubleshooting
Scan tool 115
scan tool Power Pressure Probable.
65
[Comment]l PSP switch failedBackgroundl Wiring harness and connectors failed lData from the PSP switch allows the PCM to compensa te for the additional load put on
the engine during steering maneuvers that require h igh steering pump pressure.
Range of Check
l Vehicle speed: 90 (56 mph),Set Conditionl PSP switch output voltage: High for 30 seconds
N G Measure at the t h e P S P Disconnect the connector and measure at the compone nt side.
Measure at the switch connector lDisconnect the connector, and measure at the harness side.
l Voltage between 1 and ground
(Ignition switch: ON)
OK: Battery positive voltage
OK
Replace the PCM. Check the harness wire between the and the PSP switchconnector.
O K
Replace “the PCM.
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E N G I N E ( N O N - T U R B O ) >
Scan tool 118
C o d e
No. 72
[Comment]l Engine coolant temperature Backgroundl Intake air temperature sensor l The PCM monitors the fuel system for compliance wit h emission standards:’
l Head gasket ‘failed Range of Checkl Engine coolant temperature is greater than l Exhaust manifold cracked , l , Injectors failedl Closed loop operation
l MAP sensor failed .
Set Condition l Heated oxygen sensor failed,
l The test fails if the fuel control system reduces p ulse width by 25% long l regulator and 7% short term compensation due to a rich condit ion. W i r i n g failed
l Incorrect fuel used
l PCM failed
N G
05 Engine coolant temperature sensor. (Refer to
NGSCAN TOOL SENSOR READ
27 Intake air temperature sensor (Refer to
NGSCAN TOOL SENSOR READ TESTS (Data list)
11 MAP sensor reading (Refer to
OK
Check the engine coolant temperature circuit. INSPECTION -PROCEDURE 38.) . ., , ,
. - -
Check the intake air temperature circuit. (Refer t o INSPECTION PROCEDURE 39.)
Check the MAP sensor circuit. (Refer to INSPECTION
PROCEDURE
SCAN TOOL SENSOR READ TESTS (Data list)
63 Oxygen sensor volts (rear) (Refer to
l Transaxle: gear range l Drive with wide-open throttle
O K :
heatedoxygen circuit. PROCEDURE 41.) ,
OK
SCAN TOOL SENSOR READ TESTS (Data list)
02 Oxygen sensor volts (front) (Refer to
OK: during sudden racingINSPECTION PROCEDURE 42.) ,
SCAN TOOL SENSOR READ OK
Oxygen sensor volts (front) (Refer
OK
Check the following items.l Check the injectors for operation sound.
l Check the injectors for leakage.
l Check the evaporative emission control system.
l Check for contamination (water, kerosene, etc.) in the fuel.
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ENGINE (NON-TURBO)> Troubleshooting
Scan tool 119
Code General scan tool
No. 71Fuel System LeanProbable
51
[Comment]l Engine coolant temperature sensor Backgroundl The PCM monitors the fuel system for compliance wit h emission standards.l
Intake air temperature sensor failed- l Head gasket Range of Check
l Exhaust manifold cracked
l Engine coolant temperature is greater than l Injectors failed
l Closed loop operation
l MAP sensor failed
Set Condition
l Heated oxygen sensor failedlThe test fails if the fuel control system increases pulse width by 25% long term memory
and 12% short term compensation due to a lean condi tion.l
Fuel pressure regulator l l Fuel filter or fuel line blocked
l Fuel pump failed (insufficient discharge)
l Incorrect fuel used
__
l PCM failed
NGSCAN TOOL SENSOR READ TESTS (Data list)
05 Engine coolant temperature sensor (Refer to
SCAN TOOL SENSOR READ 27 Intake air temperature sensor to
SCAN TOOL SENSORREAD11 MAP sensor reading (Refer to
I
NG
Check the engine coolant temperature circuit.
(Refer to INSPECTION PROCEDURE 38.)
Check the intake air temperature circuit.(Refer to PROCEDURE 39.)
Check the MAP sensor circuit.
( R e f e r
63 Oxygen sensor volts (rear) (Refer to l Transaxle: gear range
SCAN TOOL SENSOR READ TESTS (Data list)
02 Oxygen sensor volts (front) (Refer to
OK: during sudden racing
NG Check the heated oxygen sensor (front) circuit.(Refer to INSPECTION PROCEDURE 42.)
SCAN TOOL SENSOR READ TESTS (Data list)
02 Oxygen sensor volts (front) (Refer to
OK: Repeat and alternately whenidling.
Check the fuel pressure. (Refer to
OK
Check the following items.
l Check the injectors for operation sound.
,
l Clean the injectors.
l Check the positive crankcase ventilation system.
l Check the fuel pump.
lCheck the fuel filter and fuel line for blockages.
l Check for exhaust gas leaks.
l Check for contamination (water, kerosene, etc.) in the fuel.
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(NON-TURBO)>
Scan tool 126
Code General scan tool Downstream Shorted to
No. 38Voltage
21
[Comment]l Heated oxygen sensor failedBackgroundlDownstream heated oxygen sensor requires a heater c ircuit for proper operation.l harness and connectors
l
The heater circuit is supplied with battery voltage through the relay relay).l .
lA failure in the sensors heater circuit prevents it
from providing accurate data to the lIf the PCM monitors more than 1.2 volts, the sensor has shorted to heater circuit voltage.Range of Checkl Two or more minutes after the engine startsl Engine coolant temperature: or moreSet Conditionl Heated oxygen sensor output voltage is more than 1. 2 for 3 seconds.
NGCheck the heated oxygen sensor (rear). (Refer to R e p l a c e
OKNGCheck the following Repair
OK
Check trouble symptom.
NG
Check the harness wire between the PCM and the hea ted NG
sensor (rear) connector.
OK
Replace the PCM.
Scan tool 128
Code General scan tool Closed Loop Temperature
No.
17
[Comment]l Thermostat fully openBackgroundl Engine coolant temperature sensorl The fuel control system remains in open loop due to low engine lEngine coolant temperature sensor lThis DTC will be stored if engine temperature remains for 10 minutesimproperly connected
of operation and no engine coolant temperature sens or code has been set.
l PCM failed,
Range of Check
l Engine: running ,Set ConditionlEngine coolant temperature does not exceed after 10 minutes have passed ,
since starting the engine.
,
NGCheck the thermostat. (Refer to GROUP 14 Thermostat.) Replace
OKNG Replace
Check the following connectors:NG Repair
Check trouble symptom.
temperature
sensor connector. OK
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ENGINE (NON-TURBO)>
Scan tool 129.
C o d e G e n e r a l s c a n t o o l D o w n s t r e a m Stays at
No. 40. 21
[Comment]Backgroundl Heated oxygen sensor (rear) ,
l Sensor output voltage is checked. l
Sensor signal circuit open
PCM failedlIf voltage stays at center instead of switching, an open circuit is likely.Range of Check
. .l 2 minutes after starting enginel Engine coolant temperature: More than Set Condition.lNeither rich nor lean condition is detected from th e downstream heated oxygen sensor .
input. (Voltage is 0.5 volts for 1.5 minutes)
Check the heated oxygen sensor (rear)
OK
NG
N G
Replace
Repair
OK
Check trouble svmptom.
NG
Check the harness wire between thesensor (rear) connector.
OK
NG Repair
Replace the PCM.
Scan tool 132
Code
No.
scan tool Throttle Position Does Not Agree
Map
24
[Comment] Background
lThis DTC indicates a failure in the rationality che ck comparing MAP values to throffleposition.Range of Check
l Engine speed: less than 1,500
l Subtract MAP value from atmospheric pressure:
more than 13 (19 psi) [when atmospheric pressure is more than 7 7 (11 psi)]
more than 6 (0.9 psi) [when atmospheric pressure is less than 77 (11 psi)]
Set Condition
l Throttle position sensor output voltage is 3.75-4.7 1 V.
Range of Check
l Engine speed: more than 1,500
l Vehicle speed: more than 25 mph
l Subtract MAP value from atmospheric pressure: less than 13 (19 psi)
Set Condition
l Throttle position sensor output voltage is
V.
SCAN TOOL SENSOR READ TESTS (Data list)
07 Throffle position (Refer to
OK
. _ -
SCAN TOOL SENSOR READ TESTS (Data list)
69 MAP gauge reading (Refer to
t -
OK
Replace the PCM.
. sensor failed position sensor related lMAPlM A P related circuit
.
Check the throffle position sensor system. (Refer. I N S P E C T I O N P R O C E D U R E FO RC O D E (Refer to I N S P E C T I O NPROCEDUREF O R D I A G N O S T I C T R O U B L E C O D E
Check the MAP sensor system. (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 (Refer to INSPECTION FOR DIAGNOSTIC TROUBLE CODE
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( N O N - T U R B O ) >
Scan tool 133
Code General scan tool Timing Belt Skipped 1 Tooth or
No.More
11 ,,
[Comment]l Timing belt improperly BackgroundlThe PCM uses voltage signals generated by the camsh aft position sensor and l C r a n k s h a f t s e n s o r
position sensors to determine engine synchronizatio n.
l lif these signals become out of sync, this DTC is pr oduced.
l Range of Check connected l With the engine running, every 44 ms an inhibit con dition is looked for as follows:lwide-open throttle, large change in MAP, cold engine, insufficient start to run time, Crankshaft position sensor eriy connected outside given windowslCamshaft’s relative position not lif an inhibit condition does not exist, the misalignment between the camshaft and crankshaftone of the following have been serviced:
is monitored.
Set Condition camshaft, timing. ten-
When the camshaft position sensor is offset from th e crankshaft position sensor one tooth
sprocket,or more.PCM the
NGCheck the following Repair
,Check the camshaft position sensor.
(Refer to GROUP 16 Ignition System.)
OK
Check the crankshaft position se
(Refer to GROUP 16 IgnitionSystem.)
OK
I
NG Repair
,
Check the timing belt. (Refer to GROUP 11
Timing Belt.)
Caution
When the following parts arereplaced with new ones, be sure to use the scan to
the camshaft position sensor with the crankshaft po sition sensor again or disconnect the negative
battery cable for 10 seconds or more:
camshaft, camshaft sprocket, timing belt, tensioner, cylinder head, head gasket, crankshaft sprocket,
crankshaft, cylinder block, etc.
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ENGINE (NON-TURBO)>
Scan tool 135
No. No 5 Volts to MAP
14
[Comment]Background Open circuit
The
of 5 volts is to the MAP sensor. if this is extremely l Signal circuit grounded ,lthe MAP sensor output deviates from standard .
Range of Check Before starting engine and immediately after stopp
ing engine
Set Condition ,
The output of MAP sensor is lower than the specified
Measure at the MAP sensor connector lDisconnect the connector, and measure at the harnes
s side.
l between 2 and ground
(ignition switch: ON)
O K :
OK
Check the harness wire connector. Repair, if necessary.
Check the following connectors: Repair
OK .
Check trouble symptom. .
N G, N GCheck the harness wire between the PCM and MAP Repairconnector.. .
OK
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E N G I N E
Scan tool 136
Code General scan tool No 5 Volts to Throttle
No.Sensor
24
[Comment]
Backgroundl S e n s o r circuit grounded
lThe of 5 volts is to the TPS. if thisvoltage is extremely low, TPS l position sensor . Loss of output deviates from standard Range of Check
l Vehicle speed: More than 20 mph
l Engine speed: 1500
or more
l Manifold vacuum: Less than 13 (4 Set ConditionlThe output voltage of TPS is lower than the
l
Check the throttle position sensor (TPS) (Refer to
Measure at the throttle position sensor connector Check the following connectors: lDisconnect the connector, and measure at the harnes s sideOK
Check trouble symptom.
U K
Check the following connectors:
OK
NG
Check the wire between the PCM Repair, if necessary..
Repair
Check trouble symptom.
N G
Check the harness wire between the PC
OK
Replace the PCM.
Repair .
Scan tool 137
EATX Controller DTC Present cause
45.
[Comment] Sensors related to Background controlThe transaxle control module monitors the malfunctions of sensors and
actuatorsl TCMregarding the transaxle if any malfunction is detected, the TCM informs th e PCMl PCM failedby sending a Range of Check, Set Conditions
A malfunction is input from the TCM.,
Check the TCM (Refer to GROUP Troubleshooting.)
Revision

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)>
Scan tool 146
Code General scan too!
No.5 Volts Supply output Low‘
14
[Comment)
l The PCM supplies aregulated B-volts to the and MAP sensor.lThis DTC is set when both the and MAP sensors have the sensing too low of voltage.
Range of Check
l Ignition switch: ON
Set Condition
l
feed circuit drops below 4 volts for over four sec onds.l
supply circuit groundedl
PCM failed
Check harness wire between the PCM the MAP sensor connector. Repair, if necessary.
N G
Measure at the position sensor connector Check the following connectors: lDisconnect the connector, and measure at the harnes s side.
l Voltage between 3 and ground
(Ignition switch: ON)
OK: 4.8
Repair
OK
.
Check harness wire between the PCM and the TPS necessary;
NGCheck the following Repair
OK
Replace the PCM. ,
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