check engine light MITSUBISHI SPYDER 1990 Service User Guide

ENGINE On-vehicle.’
M A N I F O L D V A C U U M
1.Before inspection, set vehicles. in the condition:
Engine coolant
lLights, electric cooling and
lTransaxle: Neutral (P
2. Connect the scan tool to the data link connector.
,
3. Attach a three-way joint to the vacuum
the fuel pressure regulator and the intake manifold, and
connect a vacuum gauge.
4.Start the engine and check that idle speed is withi n specifi-
cation.
Standard value: 800 100
5. Check the manifold vacuum.
Limit: min. 60
(18
LASH CHECK
A tappet-like may be produced from several items.
Check the following items. 1. Engine oil level too high or too low.
This may cause, aerated oil to enter, the adjusters and
cause them to be spongy.
2.Insufficient running time after rebuilding the cyli nder head.
Low speed running up to 1 hour may be required.
3. Low oil pressure.
4. The oil restrictor pressed in to the vertical oi l passage
to the cylinder head is plugged with debris.
5.Air ingested in to oil due to broken or cracked oil pump
pick up.
6. Worn valve guide.
7. Faulty hydraulic lash adjuster. (1) Check for sponginess while still installed in e ngine.
Depress part of the cam follower just over the adju ster.
Normal adjusters should be free and very firm.
Spongy adjusters can be depressed to the bottomed
position easily.
(2) Remove a suspected hydraulic lash adjuster asse m-
bly.
(3) Clean out dirt and varnish with solvent.
(4) Reassemble with engine oil.
(5) Check for sponginess.
(6) If still spongy, replace
new adjuster
assembly. .
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11 ENGINE OVERHAUL Cooling System
(1) Install switch.
(2) Install engine coolant
lighten sensor
to 7 Nm (5
torque.
Overflownipple
Pressure cap
Impeller
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O-ring
(3) Place a new gasket (dipped in clean water) on water
box surface, center thermostat in water
gasket.
Place housing over gasket and thermostat; making su re
thermostat is in the thermostat housing. Bolt housing
to water box. Tighten bolts to 22 Nm
(4) Install O-ring.
(5) Install water pipe.
(6) Install water hose.
( 7 ) I n s t a l l e x h a u s t m a n i f o l d c o v e r :
(8) Install oil level gauge.
(9) Install new O-ring gasket in water pump body O- ring
groove.
Caution
Make sure O-ring is properly seated in water pump
groove before tightening screws. An improperly
located O-ring may cause damage to the O-ring and
cause a coolant leak.
pump body to block and tighten screws to 12
Nm (9
(ll)Rotate pump by hand to check for freedom of mov ement.
INSPECTION
Replace water pump body assembly if it has any of these
defects:
(1) Cracks or damage on the body.
(2) Coolant leaks from the shaft seal, evident by c oolant
traces on the pump body.
(3) Loose or rough turning bearing.
(4) Impeller rubs either the pump body or the engine bl ock.
(5) Impeller loose or damaged.
(6) Sprocket or sprocket flange loose or damaged.

On-vehicle Service
A/C COMPRESSOR DRIVE BELT TENSION ADJUSTMENT
1. Loosen tension pulley fixing nut A.
2. Adjust belt tension with adjusting bolt B.
Standard value:
When a new belt isWhen a used belt is
installed installed
Tension
382-411255-333
(Ibs.)
Deflection8.5-7.5
mm (in.)
3. Tighten fixing nut A. Tightening torque: 23-26 Nm
4.Check the belt deflection amount and readjust if ne ces-
sary.
Caution
This check should be carried out after turning the
crankshaft one full rotation or more
the forward
direction (to the right).
IGNITION TIMING CHECK
1.Before inspection and adjustment set vehicle in the follow-
ing condition.
lEngine coolant temperature:
lLights, electric cooling fan and all accessories: OFF
Transaxle: Neutral (P range on vehicles with
2. Turn the ignition switch to OFF and connect the scan
tool to the data link connector.
3. Set up a timing light.
4. Start the engine and run at idle.
5. Select No. 22 of the SCAN TOOL DATA LIST.
6.Check that engine idle speed is within the standard value.
Standard value: 750 100
7. Select No. 17 of the SCAN TOOL ACTUATOR TEST.
Check that basic ignition timing is within the standard
value.
Standard value: BTDC
If the basic ignition timing is outside the standar d value,
inspect the components by referring to GROUP
Troubleshooting.
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ENGINE O n - v e h i c l e
Press the scan tool clear key (select aforced driving
cancel mode) to release the ACTUATOR TEST
NOTE
If the test is not a forced driving will continue
for 27 minutes. Driving under this condition may damage
the engine.
Check that the actual ignition timing is at the st andard
value.
Standard value: Approx. BTDC
NOTE
Ignition timing is variable within about even under
normal operating.
2. And it is automatically further advanced by abou t
from BTDC at higher altitudes.
CURB IDLE SPEED CHECK
Before inspection and adjustment, set vehicles in the
following condition.
lEngine coolant temperature:
lLights, electric cooling fan and all accessories: OFF
lTransaxle: Neutral (P range on vehicles with A/T)
2. Turn the ignition switch to OFF and connect the scan
tool to the data link connector.
3. Select No. 17 of the SCAN TOOL ACTUATOR TEST
4. Check the basic ignition timing.
Standard value: BTDC
5. Run the engine at idle for 2 minutes.
6. Select No. 22 of the SCAN TOOL DATA LIST.
7. Check the curb idle speed.
Standard value: 750 100
NOTE
The idle speed is controlled automatically by the i dle air
control system.
8. If the idle speed is outside the standard value, check
the components by referring to GROUP Trou-
bleshooting.
IDLE MIXTURE CHECK
Before inspection, set vehicles in the following co ndition:
lEngine coolant temperature:
lLights, electric cooling fan and all accessories: O FF
lTransaxle: Neutral (P range on vehicles with
2. Turn the ignition switch to OFF and connect the scan
tool to the data link connector.
3. Select No. 17 of the SCAN TOOL ACTUATOR TEST.
4.Check that the basic ignition timing is within the standard
value..
Standard value:
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On-vehicle
Run the engine.
8. Set CO, HC tester.
7. Check the CO contents and the HC contents at idle.
Standard value:
CO contents: 0.5% or less
HC contents: 100 ppm or less
8. the standard value is exceeded, check the following
items:
l Diagnostic output
l Closed-loop control (When the closed-loop control
is carried out normally, the output signal of the heated
oxygen sensor and
at idle.)
l
Injector
lIgnition coil, spark plug
l system the
l Evaporative emission
Compression ,
NOTE,
Replace the three-way CO and
HC contents do not
the value.
(even though the
of the” on
all items.)
PRESSURE CHECK
1.Before inspection, check that the engine oil, start er and
battery are normal. Also, set the vehicle to the fo llowing
condition:
lEngine coolant temperature:
lLights, electric cooling fan and all accessories: O FF
lTransaxle: Neutral (P range on vehicles with
2. Disconnect the spark plug cables.
3. Remove all of the spark plugs.
4. Disconnect the crankshaft position sensor
NOTE
Doing this will prevent the engine control unit fro m carrying
out ignition and fuel injection.
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E N G I N E Timing Belt
Timing marks
sprocket
mm
(2.36 in.)
or more .
BELT INSTALLATION
(1) Align the timing marks on the camshaft sprocket ; crank-
shaft sprocket and oil pump sprocket.
,
. . .
(2) After aligning the timing mark on the oil pump sprocket,’
remove the cylinder block plug and insert a Phillips screw-
driver with a diameter of 8 mm in.), and check
be sure that the screwdriver goes mm (2.36 in.)
or more. If the screwdriver will only go in 20
25 mm
in,) before striking the counterbalance shaft,
turn the sprocket once, realign the timing mark and check
that the screwdriver goes in 60 mm (2.36 in.) or mo re.
Do not take out the screwdriver until the timing ‘b elt is
installed.
(3) Install the timing belt so as not to be
the sprockets, by the following procedure.
Caution
If the timing belt is to install that
the mark indicates the clockwise direction.
(4) Set the tension pulley so that the pin
are at the
bottom, press the tension pulley lightly against th e timing
belt.
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(5) Screw the tool into the engine left support until
its end makes contact with the tensioner
At that
point, screw the tool in
and then remove
the set wire attached to the
tensioner.
(6) Remove the tool.
(7) Tighten the center bolt to the specified torque .
Specified torque: 48 (35

ENGINE OVERHAUL Rocker Arms Camshaft
I
INSPECTION
CAMSHAFT.
(1) Measure the cam height. Standard
Intake 37.39 mm (1.4720
Exhaust 37.47 mm (1.4752
Limit:
Intake 36.69 mm (1.4524 in.)
Exhaust 36.97 mm (1.4655 in.)
NOTE
The camshaft identification mark is stamped on the
opposite end of the camshaft sprocket side.
ROCKER ARM
(1) Check the roller surface. If any dents, damage or seizure
is evident, replace the rocker arm.
(2) Check rotation of the roller. If it does not rotate smoothly
or if looseness is evident, replace the rocker arm.
(3) Check the inside diameter. If damage or seizure is evident,
replace the rocker arm.
LASH ADJUSTER LEAK-DOWN TEST
Caution
1. The lash adjuster is a precision part. Keep it f ree
from dust and other foreign matter.
2. Do not disassemble lash adjuster.
3. When cleaning lash adjuster, use clean diesel fu el
only.
Use of the special tool helps facilitate the air bleeding.
of the rocker arm mounted type lash adjuster.
(3) Remove the special tool and press the plunger. If the
plunger is hard to be pushed in, the lash adjuster is normal.
Ifthe plunger can be pushed in all the way readily, bleed
the lash adjuster again and test again. If the plun ger
is still loose, replace the lash adjuster.
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(1) Immerse the lash adjuster in clean diesel fuel. .
(2)While lightly pushing down inner steel ball using t he special
tool, move the plunger up and down four or five tim es
to bleed air.

ON-BOARD DIAGNOSTICS
The
Control Module (PCM) monitors
many different circuits in the fuel injection syste m.
If the PCM senses a problem with a monitored
circuit often enough to indicate an actual problem,
it stores a diagnostic trouble code in the
memory.
After the PCM first detects a malfunction, a
diagnostic trouble code is recorded when the engine
i s r e s t a r t e d a n d t h e s a m e m a l f u n c t i o n i s
re-defected. However, for items marked with a
a diagnostic trouble code is recorded the
first detection of the malfunction.
After that, if the PCM does not re-detect the
malfunction for 40 drives* (51 engine start for
non-emission related faults), the diagnostic troubl e
code will be erased from the PCM memory.
NOTE
A drive indicates from engine start to stop and
monitors the power train component.
However, for misfiring or a fuel system rich/lean,
the diagnostic trouble codes will be erased under
the following conditions.
lWhen driving conditions (engine speed, engine
coolant temperature, etc.) are similar, to those
when the malfunction was first recorded.
l When the PCM does not re-detect the
malfunction for 80 drives*.
Technicians can display stored diagnostic trouble
codes by two different methods.
ENGINE (NON-TURBO)> Troubleshooting
The first is to cycle the ignition switch
On-Off-On-Off-On within 5
Then count
the number of times the malfunction indicator lamp
(check engine lamp) on the instrument panel flashes
on and off. The number of flashes represents the
diagnostic trouble code. There is a slight pause
between the flashes representing the first and
second digits of the code. Longer pauses separate
individual trouble codes. The second method of
reading diagnostic trouble codes uses
scan
Connect the scan tool to the
(diagnostic) connector in the vehicle.
FREEZE FRAME DATA
The PCM records the diagnostic trouble code and
also the engine operating conditions the time
the malfunction was detected. are called
“freeze frame” data.
This data indicates the engine operating condition
from when nothing at all is the initial
detection of the
However, misfiring
or fuel trim malfunction data are always. replaced
with the latest data.
This data can be read by using the scan tool, and
can then be used in simulation tests for
troubleshooting.
Data items are as follows.
DataUnit
Engine coolant temperature
Engine speed
Vehicle speed
or
or RPM
km/h or mph
Long-term fuel compensation (Long-term fuel trim)
Short-term fuel compensation (Short-term fuel trim)
Fuel control condition O p e n l o o p
l Closed loop
l Open loop-Drive condition
l Open loop-DTC set
lMalfunction of closed (rear)
Calculated load value
MAP vacuum
(vacuum)
Diagnostic trouble code during data recording
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ENGINE (NON-TURBO)> Troubleshooting 3
If scan tool not available
1.Cycle the ignition key On-Off-On-Off-On within seconds.
2.Count the number of times the malfunction indicator lamp
(check engine lamp) on the instrument panel flashes on
and off. The number flashes represents the trouble
code.There is a slight pause between the flashes
representing the first and second digits of the’ co de.
Longer pauses (approx. 4 seconds) separate individu al
,
trouble codes.
3. Repair the malfunction while referring to the in spection
chart for diagnostic trouble codes.
4. After disconnecting the battery cable from the b attery
terminal for a few minutes, reconnect the
5.Start the engine and run it at for about minutes
after the engine has warmed up.
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ENGINE (NON-TURBO)>
C h a r g i n g T o o
47
[Comment]
Background
The PCM tries to maintain charging system voltage of between and 15 volts.
l This code indicates:
The battery voltage input is below the target charg ing voltage during engine
andNo significant change in voltage has been detected during active testing of the generator
output circuit.
Range of Check
lEngine speed: or more for approx. one minutelBattery positive voltage is at least 1 lower than the target charging voltage for approx.60 seconds.Set ConditionlBattery positive voltage does not change even if th e generator field current is cut off.
lDefects in generator or adjustmentl High resistance generatorl High between battery and
generator ground
l PCM
Check that the generator drive belt is properly in stalled. Repair
NG Measure the voltage between the generator terminal and the battery positive terminal. Engine: 1600 Headlight: High beam ON)
OK: Less than
Check the harness wire and terminal generator terminal and battery necessary.
NGMeasure the voltage between the generator body and battery Check the generator grounded line: neoative terminal. Engine: 1600 Headlight: High beam ON)
OK: Less than 0.5
OK
Measure at the generator lDisconnect the connector, and measure at the harnes s side.
SCAN TOOL Actuator test 10
relay (ASD relay) isturnedonandoff everyapprox. l Voltage between 1 and ground
[Measure when the relay (ASD relay) is turned on.]
OK: Battery positive voltage
NG Check the wire between generator relay
(ASD relay) connector. Repair, if necessary.
OK
Check the harness wire NG Repair connector.I
OK NG
SCAN TOOL SENSOR READ TEST (Data list) Check the harness wire between the PCM and the bat tery 10 Battery voltage as the ignition switch. Repair, if necessary.OK: indicated on the scan tool and actual positive
Check trouble symptom.
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