engine coolant MITSUBISHI SPYDER 1990 Service Manual PDF

ENGINE (NON-TURBO)>
Scan tool 106
Code General scan tool
No.Multiple Cylinder Mlsfire
43
[Comment]Background
l Excessive engine misfire results in increased catal yst temperature.
l Severe misfire could cause catalyst damage.
l To prevent catalytic converter damage, the PCM moni tors engine misfire.
l The PCM monitors for misfire during most engine ope rating conditions.
lWhen a misfire is detected, the PCM stores a diagnostic trouble code and causes the to either flash or illuminate continuously during active misfire.
Range of Check
l MAP voltage is less than 1.60
l Engine speed is between 2200 and 2800 l Engine coolant temperature is greater than l Vehicle speed less than Set Condition
l 1000 Rev Misfire
The PCM detects misfire in more than 1.6% of the en gine cycles in a 1000 revolution
period.l 200 Rev MisfireThe PCM detects misfire in more than 15% of the eng ine cycles in a 200 revolution period.
.
Spark plugs or wires failed
l Ignition coil failed
l Crankshaft position piston rings v a l v e s
l Head gasket failed
l C r a c k e d
l Fuel lines and filter failed
l Fuel failed
l failed
l Wiring and connectors failed
l Engine coolant
l Timing belt tooth broken,
l EGR
SCAN TOOL SENSOR READ TESTS (Data list)
05 Engine coolant temperature sensor (Refer to Check the engine coolant temperature circuit.
(Refer to INSPECTION PROCEDURE 38.)
OK
SCAN TOOL SENSOR READ TESTS (Data list)
27 Intake air temperature sensor (Refer to
OK
Check the intake air temperaturecircuit.(Refer to INSPECTION PROCEDURE
SCAN TOOL SENSOR READ TESTS (Data list)
11 MAP sensor reading (Refer to
OK
OK
Check the MAP sensor circuit.(Refer to INSPECTION PROCEDURE 40.)
SCAN TOOL SENSOR READ TESTS (Data list)
Check the following connectors: 66 Oxygen sensor volts (front) (Refer to OK: Repeat and alternately whenidling.
Check the fuel pressure. (Refer to Check the harness wire between the PCM and the cran kshaft
position sensor connector.
l Check the injectors for operation sound.
l Check the injectors for fuel leakage.
l Check the evaporative emission control system.
Check the following items.
l Check the ignition coil, spark plug cables.
l Check the compression pressure.
Check the EGR
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E N G I N E
Scan tool
Cylinder Misfire
Code General scan tool Cylinder Misfire
No.Cylinder MisfireProbable cause
Cylinder Misfire
43,
[Comment]
Backgroundl Spark plugs or ,
l Excessive engine misfire results in increased catal yst temperature.l l . valves
l Severe misfire could cause catalyst damage.
l To prevent catalytic converter damage, the PCM moni tors engine’ misfire.l
H e a d g a s k e t f a i l e d
l The PCM monitors for misfire during most engine ope rating conditions., h e a d
When a misfire is detected, the PCM stores a diagno
stic trouble code and causes thel
Injector failedl to either flash or illuminate continuously during active misfire.
Range of Check
l MAP voltage is less than
l Engine speed is between 2200 and l Engine coolant temperature is greater than l Vehicle speed less than Set Conditionl 1000 Rev Misfire l
Wiring harness and connectors failed
6
The PCM detects misfire in more than 1.6% of the en gine cycles in a 1000 revolutionperiod. 200 Rev MisfireThe PCM detects misfire in more than 15% of the eng ine cycles in a revolution period.
NG
OK
OK
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Check the following items.
l Check the spark plug, spark plug cables.
l Check compression pressure.
l Check the cylinder head gasket and intake manifold gasket for damage.

ENGINE (NON-TURBO)>
Scan tool 112
C o d e G e n e r a l s c a n t o o l C a t a l y t i c C o n v e r t e r E f f i c i e nc y
No.Failure,
64
[Comment]l Catalytic converter Backgroundl Heated oxygen sensor failedlDuring normal closed-loop operation, the PCM monito rs the catalytic converter for hydrocar-l E x h a u s tbon conversion (HC) efficiency.l . failedlWhen HC conversion drops below 60 percent efficienc y, the PCM stores a diagnostic
l PCM failed
trouble code. .
Range of Checkl
Engine coolant temperature greater than l Vehicle speed greater than for 2 minutesl Open throttlel Closed loop operationl Engine speed between 1248 and 2400 l MAP voltage between 1.50 and 2.60 Set Conditionl The switch (Lean/Rich) rate of the rear heated oxyg en sensor reaches 70% of the frontsensors switch rate.
Check the exhaust system.
l Check for cracks or exhaust leaks.Replace the exhaust manifold.
OK
SCAN TOOL SENSOR READ TESTS (Data list)
63 Downstream heated oxygen sensor volts
(Refer to
Transaxle: range
l with wide-open throttle
OK: 600 1000
SCAN TOOL SENSOR READ TESTS (Data list)
02 Upstream heateed oxygen sensor volts (Refer to
OK: 600 1000 during sudden racing
N G Check the heated oxygen sensor (rear) circuit(Refer to INSPECTION PROCEDURE
, , .
NGCheck the heated oxygen sensor (front) circuit (Ref er to INSPECTION PROCEDURE 42).
OK
SCAN TOOL SENSOR READ TESTS (Data list)
02 Upstream heated oxygen sensor volts (Refer to
OKRepeat 0 400 and 600 1000 alternately whenidling.
OK
Replace the heated oxygen sensor (rear).
Check trouble symptom.
N G
Check trouble symptom.
NG Replace the heated oxygen sensor (front).1
NG
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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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.

E N G I N E
Scan tool 154
C o d e G e n e r a l s c a n t o o l T e m p e r a t u r e S e n s o r
No.Voltage Too High
44
[Comment]
Backgroundl Battery temperature sensor l PCM failedBattery temperature input is used to adjust the gen erator charging rate based upon the ambienttemperature around the battery.Range of CheckIgnition switch: ON
Set Conditions .
The sensor voltage remains more than 4.9 for 3 seconds.
Replace the PCM.
Scan tool 155
C o d e G e n e r a l s c a n t o o l U p s t r e a m S h o r t e d t o
No. G r o u n d
[Comment]
Background
lWhen the heated oxygen sensor temperature is low, t
he sensor has the same electrical
characteristics as an insulator.
lThe heated oxygen sensor output signal line is rest ricted to That is why the line voltageis approx. when the heated oxygen sensor temperature is low.lIf the heated oxygen sensor output signal line is grounded, its voltage will become low.
Range of Check
l Engine coolant temperature when the engine starts:
or less
l Within three seconds after the engine
Set Conditions
The heated oxygen sensor output signal line is or less.
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l
.
Upstream, heated oxygen sensor failed
Wiring harness and connectors failed PCM failed
NGCheck the harness wire between the PCM and upstream heated Repair
oxygen sensor connector.
OK
Replace the PCM.

,
-- Scan tool 156,I
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 to
No. G r o u n d
21
[Comment]l Downstream heated oxygen Backgroundl harness and connectors lWhen the heated oxygen sensor temperature is low, t he sensor has the same electrical
l PCM failed characteristics as an insulator.lThe heated oxygen sensor output signal line is That is is approx. when the heated oxygen sensor temperature is low.If the heated oxygen sensor output signal line is g rounded, will become lRange of checkl Engine coolant temperature when the engine starts: or lessl Within three seconds after the engine starts
Set Conditions
The heated oxygen sensor output signal line is
or less.
NGCheck the harness I .oxygen sensor connector.. , ,
OK
Replace the PCM.
11
[Comment]Background , connectedlAfter the engine has been started, the PCM maintain s an expected camshaft port l position
Scan tool 157,General scan toolIntermittent Loss of CMP CKP Probable cause
value. connectedlAt every crankshaft leading edge, this value is updated to reflect the expected
.Camshaft position sensor change in the cam level.
l lAt every crankshaft trailing edge, this value is compared to the true port level. sensor improperly lIf there is a disagreement between two values, then the diagnostic code isset.l sensor
Range of Check
l Engine: running
Set Condition
l Cam and crank signals have been out of sync, than times.
N GCheck the following connectors:. A-l 06
OK
__Check no cam sync. signal at PCM. (Refer to INSPECTION PROCEDURE FOR DIAGNOSTIC TROUBLE
CODE.
Check no crank reference signal at PCM. (Refer to INSPECTION PROCEDURE FOR DIAGNOSTIC TROUBLE
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