coolant temperature MITSUBISHI SPYDER 1990 Service Repair Manual

ENGINE (TURBO)
AND ENGINE> Troubleshooting
Has the engine warmed up sufficiently when the exhaust gas is
tested? (Check with owner.)Let the engine warm up sufficiently before testing the exhaust gas.
,
l Check all vacuum hoses and connectors.
l Check electrical wires and connectors for obvious p roblems.
l Check the exhaust system for missing Repair
No
Check the ignition timing Engine (Turbo)>.
Check the ignition timing Engine>.
(Refer to GROUP
Refer to INSPECTION CHART TROUBLE CODE.
NG Check that the crankshaft position sensor and timi ng belt cover
are properly.
SCAN TOOL list
21 Engine coolant temperature sensor
(Refer to P.
Check the engine coolant temperature sensor circui t malfunction.
OK
NGCheck the intake air temperature sensor circuit mal function. (Referto INSPECTION PROCEDURE FOR DIAGNOSTIC
TROUBLE CODE
25 Barometric pressure sensor (Refer to
IOK
NG Check the barometric pressure sensor circuit (Refer
to INSPECTION PROCEDURE FOR DIAGNOSTIC
TROUBLE CODE
, N G
SCAN TOOL Data list Check the oxygen sensor circuit malfunction (bank 1 sensor 2).
59 Heated oxygen sensor (rear)’ (Refer to
l Transaxle: gear range TIC TROUBLE CODE l Drive with wide open throttleO K : 6 0 0 1 0 0 0
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OKNGSCAN TOOL Data list Check the oxygen sensor circuit malfunction (bank 1 sensor 1).
11 Heated oxygen sensor (front) (Refer to
OK: 600 1000 when racing suddenly TIC TROUBLE CODE
OK
OK
SCAN TOOL Data list Check the EGR system. (Refer to GROUP 17 Emission Control11 Heated oxygen sensor (front) (Refer to System)OK: 0 400 and 600 1000 alternately when idling
and 2500 OKNGMeasure the CO
Check the fuel pressure. (Refer to
sensor
l Check the injector for fuel leakages.
Check troub symptom. l Check the injectors for operation sound.
l Check the
spark plugs, spark plug cables.l Check the compression pressure. Replace the three-way catalytic converter.
l Check the positive crankcase ventilation system.
l Check the evaporative emission control system.

ENGINE (TURBO)
AND
ENGINE> Troubleshooting
INSPECTION PROCEDURE 35
Idle air control motor (DC motor) Engine>P r o b a b l e c a u s e
[Comment]l Malfunction of idle air control motor
The ECM controls the intake air volume during idlin g by opening and closing the I m p r o p e r c o n n e c t o r open “circuit’ servo valve located in the bypass passage.
l Malfunction of the
at the idle air control motor connector Connect the connector. (Use test harness: Voltage between 5 and ground (Ignition switch: ON)
OK: 2 or more to 0 (momentarily) Voltage between 6 and ground (Ignition switch: ON)OK: 4 or more to 0 (momentarily)
OK
the idle air control motor.1
Check symptom.
Replace
INSPECTION PROCEDURE 36
Scan tool: Inspection when no initial combustion oc curs
SCAN TOOL Data listNGCheck the power and ignition 16 Voltage of ECM power source (Refer to (Refer to I PROCEDURE 27.)
(Whenoil filler cap is removed.)
SCAN TOOL DTC
Are the diagnostic trouble codes output
Check timing belt for breakage.
INSPECTION CHART FOR TROUBLE CODES.
(Refer to
SCAN TOOL list NG
22 Crankshaft position sensor OK: Cranking speed is displayed.
OK
Check the crankshaft position sensor circuit malfu nction. (Refer to INSPECTION PROCEDURE FOR DIAGNOSTIC
TROUBLE CODES
SCAN TOOL Actuator testCheck the fuel pump system Engine 07 Fuel pump (Refer to (Refer to INSPECTION PROCEDURE 28.)
OKCheck the fuel pump system (Refer to INSPECTION PROCEDURE 29) .
SCAN TOOL list21 Check the engine coolant temperature circuit (Refer to INSPECTION PROCEDURE FOR DIAGNOSTICTROUBLE CODES
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ENGINE (TURBO)
AND. ENGINE> Troubleshooting . ,
INSPECTION PROCEDURE 40
‘A, .
Scan tool: Inspection when idle speed is unstable.
SCAN TOOL Data list
NG
26 Closed throttle position switch (Refer to TROUBLE CODE
SCAN TOOL Data listNG Check the intake air temperature circuit (Refer 13 Intake air temperature sensor (Refer to INSPECTION’ PROCEDURE FOR DIAGNOSTICTROUBLE CODE 10.)
SCANTOOL Date listCheck the barometric pressure circuit malfunction. (Refer to 25 Barometric pressure
sensor (Refer toINSPECTION PROCEDURE FOR DIAGNOSTIC TROUBLE
.
SCAN TOOL list Check the engine coolant temperature circuit 21 I N S P E C T I O N P R O C E D U R E F O R
OKTROUBLE CODE 15.)
SCAN TOOL Actuator test
08 Evaporative emission purge solenoid
(Refer to P. NG Check the evaporative emission control system circuit malfunction. (Refer to INSPECTION PROCEDURE’FOR DIAGNOSTIC TROUBLE CODE
SCAN TOOL Data listNG
59 Heated oxygen sensor (rear) (Refer to l Transaxle gear range l Drive with wide open throttleOK: 1,000
OK
SCAN TOOL Date list11 Heated oxygen sensor (front) (Refer to OK: during sudden racing
Check the oxygen sensor circuit malfunction (bank ‘(Referto P. INSPECTION PROCEDURE FOR DIAGNOSTIC
TROUBLE CODE
Check the oxygen sensor circuit malfunction (bank 1) (Refer
to INSPECTION PROCEDURE’ DIAGNOSTIC
TROUBLE CODE
11Heated oxygen sensor (front) (Refer toOK:Chanaes between and during idlingI
SCAN TOOL Data listNG.
27
Power steering pressure switch (Refer to
OK
Check the power steeringpressure sensor circuit performance.
PROCEDURE FORDIAGNOSTIC TROUBLE
CODE
into the l Broken intake. g a s k e t Broken vacuum l PCV valve dose not
lBroken air intake 2. Check the injector
SCAN TOOL Data list
28 switch (Refer to
OK
N GCheck the switch and relay system. (Refer to INSPECTION PROCEDURE 32.)
SCAN TOOL Data listN G
29 Park/neutral position switch (Refer to Check the ignition switch-ST and (Refer to INSPECTION PROCEDURE 31.)
OK
SCAN TOOL Data list
45 Idle air control motor position Engine (Turbo)>
(Refer to
55 Idle air control valve position sensor Engine>
(Refer to
NGAdjust the basic idle speed. (Refer to
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ENGINE (TURBO)
AND
ENGINE>
DATA LIST REFERENCE TABLE
Item No.
1 1
12
13
14
16
18
21
22
Inspection item
Heated oxygen sensor (Front)
Volume air flow sensor
Intake air temperature sensor
Throttle position sensor Power supply voltage
Cranking signal (Ignition switch-ST)
Engine coolant temperature sensor
Crankshaft position sensorGeneral-
scan tool
, . .
,
,
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ENGINE (TURBO)
AND ENGINE>
Caution
1. Always apply the brakes when shifting the select or lever to ran&, or vehicle will
forward.
2. Driving tests always need another personnel.
NOTE
In a new vehicle [driven approximately 500 km (300 mile) or less], the volume air sensor output
is sometimes 10 higher than the standard frequency.
The injector drive time represents the time when the cranking speed is at 250 or below when the
supply voltage is 11 V.
In a new vehicle [driven approximately 500 km (300 mile) or less], the injector drive time is sometimes
longer than the standard time.
Fuel is injected into all cylinders simultaneously.
In a new vehicle [driven approximately km (300 mile) or less], the step of the stepper mo tor is sometimes
30 steps greater than the standard value.
If the throttle position sensor voltage rises 100 from the voltage when the engine is at idle and th e
closed throttle position switch turns from on to of f at this time, the sensors are normal. If the throttle position
sensor voltage rises 100
from the voltage when the engine is at idle, the t hrottle valve opens, and the
closed throttle position switch turns from on to of f at this, time, the sensors should be adjusted.
Item Inspection
No.item
Inspection contents Normal contentsInspection
procedure page
11HeatedEngine: WarmWhen at 4000 200 or Code No.
gen sensor engine is suddenly(Air/fuel mixture is 30
(Front)
made leaner
when decelerat- ing, and is made
richer when
When engine is
suddenly raceding.)
Engine: Warm Engine is idling
400 or
(The heated 1,000 ,gen sensor signal(Changes)
is used to check
2,500
the air/fuel mix-
ture ratio.)
Volume airl Engine coolant Engine is idling 22-46 Hz’
flow sensortemperature(4.3-5.3 g/s)
(Mass airl
Lights,electric
flow rate) cooling fan and all Engine
accessories: OFF(Turbo)>
l Transaxle: Neutral Hz
range)(1 g/s)
2,500
Engine is raced
Hz
(9.8-12.1
Engine,
Hz ,
Engine>
Frequency (or air
flow volume) in
creases
re- ,
sponse to racing.
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E N G I N E .
AND ENGINE> Troubleshooting
Item InspectionInspection contentsNormal contents
No. itemInspection
‘ p r o c e d u r e
No., ,
13Intake airIgnition switch: ON orIntakeA tCode No. temperaturewith engine runningair tern- sensor,
tureAt .
,
At
At
A t ,
Throttle Ignition switch: ON Set to idle position ,000 position
sor .
Gradually openVoltage increases
in proportion to
throttle opening
angle
Open fully
PowerIgnition switch: ON Battery
voltage No.
27
8
Cranking Ignition switch: ON Engine: Stopped OFF
s i g n a l No.
tionE n g i n e : C r a n k i n g O N 30
EngineIgnition switch: ON or Engine At Code No. antwith engine runningc o o l a n t
ture sensortemper-
a t u r e
At
At
At
2Crankshaftl Engine: Cranking Engine speeds dis- Code No.
positionl
Tachometer: Connectedplayed on the scan
sor tool and tachome-
ter are identical.
l Engine: Idle
l Closed Engine At , 5 0 0 r p m
throttlecoolantposition switch: ON
atureAt ,400 rpm
(32” F)
At
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ENGINE (TURBO)
AND
ENGINE>
Inspection
No. item
Inspection contents Normal contentsInspection
p r o c e d u r e p a g e
No.
22
Crankshaftl Engine: Idle
Engine At Code No. position l Closed
throttlecoolant F)
sor position switch: ON
atureAt rpm
24VehicleDrive at 40 (25 miles/h)
Approx. 40 km/hCode No. speed sensor
25BarometricIgnition switch: ON
HeightAt101Code No. pressure
sensor
At 600 95
(1,969 ft.)
(3,937 ft.)
At 1800 81
(5,906 ft.)
26Closedl Ignition switch: ON Throttle valve: SetONCode No. throttlel Depress accelera- to idle position
tion switch tor pedal Throttle valve:
Slightly open
Power steer- Engine: IdleSteering wheel OFFCode No. ing pressure
switchSteering wheel turn- ON
ing
A/C switch
Engine: Idle
A/C switch: OFFOFF
(When A/C switchdure No.
is ON, 32
should beA/C switch: ONON
operating)
Park/Neutral
Ignition switch: ON or positiondure No..
switch 2, or
1Injectors**Engine: Cranking
When engine
ant temperature is Engine,
1 5 - 2 2
Engine>
Revision

E N G I N E
AND ENGINE>. . .
Item Inspection
No. item
41Injectors**Inspection contents
Engine: Cranking
procedure
When engine
a n t t e m p e r a t u r e
Engine>
When engine cool-
ant temperature is Engine
( T u r b o ) ?
7.2-11
.
Engine>
,l Engine coolantEngine is idlingtemperature: Engine
(Turbo)>
2.2-3.4l Lights,electriccooling fan and all Engine>
accessories: OFF l Transaxle: Neutral 1.75
range) E n g i n e
44
When engine is Increases
denly raced
.
Ignition coilsl Engine: WarmEngine is idling
and ignitionl Timing light is set Engine
power(The timing light
sistor is set in order to(Turbo)>
check actual __
tion timing)2,500
. .
.
,
Idle air con-e Engine coolantA/C switch: OFF2-25 steps
trol
position*
re:
l
Lights,Engine
(Turbo)> cooling fan and allA/C switch: OFF Increases by
accessories: OFF
l Transaxle:1 steps
tral range)
l Closedthrottle .
position switch:
l
Idle l
A/C switch: OFF Increases by Select lever:(When A/C switch
is ON, A/C com- r a n g esteps
pressor should be
operating)
A/C
clutch relay Engine: Warm, idle
A/C switch: OFF
A/C switch: ON OFF (Compressor
clutch is not dure No.
ating)32
OFF (Compressor
clutch is operating)
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E N G I N E ( T U R B O ) .AND ENGINE>
Inspection
No.item
Inspection contents , . N
O.
55 motorl Engine coolantA/C switch: OFFIncreases by
positiontemperature:
sor80 (176
Engine>
l Lights, electric
cooling fan and
all accessories: A/C switch: fromIncreases by ,
OFF OFF to ON8 50 steps
l
Transaxle:
Neutral
range)
l Closed throttle
position switch: l
A/C switch:
Increases by
ONOFF 3 steps
l Engine: at idle S e l e c t o r l e v e r :
(When the
from range
switch is on, the to range
compressor
should be
operating.)
59Heatedl
Transaxle:3,500 1,000 Code No.
gen sensor gear
(Rear)rangel Drive with wide
open throttle
31Long-term
fuel
pensation Engine: Warm, 2,500
without any load- 1 2 . 5 - 1 2 . 5Code No.
(during closed loop)
32Short-term
Engine: Warm, 2,500 without any loadCode No.
fuel(during closed loop) Engine
pensation
Engine> .
37Calculationl
Engine: WarmEngine is idling12-19
load valuelDriving range (from Engineidle to maximumoutput) .
,
E n g i n e
.
1 8Fuel control Engine: Warm2,500Closed loop 6 7
condition loop When engine is .
raced condition
ManifoldEngine: Warm; idle32.8-46.2Code No. 94
ferential E n g i n e
pressure
sensor55.3-68.7
‘Engine> .
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ENGINE (TURBO)
AND ENGINE>
Check itemIgnition power transistorCheck (Engine Normal
Engine: 3,000 .
Ignition power transistor
Terminal No.
Engine
Terminal
No.
Engine>
10 10
23 23
11
12
Turbocharger waste gate Ignition switch: ON
solenoid
Engine: Idle premium
gasoline is used)
Power supply Ignition switch: ON
2525
Boost meter
Ignition switch: ON
l Engine: IdleFrom depress the accelerator drops
16
19
19Volume air flow sensor re- Engine: IdleQ - l
set signal
Engine:6-9
Fan motor relay (High)Radiator fan is not operating [Engine
coolant
2020
21
22
33
.
Radiator fan is operating at high
s p e e d [ E n g i n e
i s
Fan motor relay (Low)Radiator fan is not operating [Engine temperature
Radiator. fan is operating at low
speed [Engine coolant temperature
is
or more]
A/C compressor clutch
l Engine: Idle or
relaylA/C switch: OFF ON 6 or more i s o p e r a t i n g ) , as A/C clutch
cycles
2 1
22
33
ine: idle after I OFF) . . A Ndrops
II. .
Generator terminal
l
36Ignition switch: OFF ON
lamp(after several seconds
have passed)
pressureEngine: Warm,W h e n s t e e r i n g
idlewheel is station-
ary
When steering
wheel is turned
37
relay (Power supply) Ignition switch: OFF
Ignition switch: ON
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