engine coolant MITSUBISHI SPYDER 1990 Service Manual PDF

E N G I N E
INSPECTION PROCEDURE 9
Idle speed is high. (Improper idle speed)
[Comment] lIn such cases as the above, the cause is probably that the intake air volume during idle is’ ltoo great. Intake manifold vacuum leak b o d y
SCAN TOOL DTC
Are diagnostic trouble codes output
NO
07 motor (Refer to
NG
Refer to INSPECTION CHART FOR DIAGNOSTICTROUBLE CODES.
Checktheidleaircontrolmotorcircuit.PROCEDURE FOR DIAGNOSTIC TROUBLE
OK
SCAN TOOLSpecial function
“Reset
Check trouble symptoms.
NG
SCAN TOOL SENSOR NGCheck the engine coolant temperature circuit.(Refer to INSPECTION
OK
SCAN TOOL OUTPUT clutch relay (Refer to
OK
NGCheck the switch and compressor clutch relay to INSPECTION PROCEDURE 26.)
Check the throttle body minimum air flow.
(Refer to
INSPECTION PROCEDURE 10
Idle speed is low. (Improper idle speed) Probable ca use
,
[Comment]l control motor In cases such as the above, the cause is probably that the intake air volume during idling is l
Malfunction of the’ throttle body
too small.
SCAN TOOL DTC
YESRefer to INSPECTION CHART FOR DIAGNOSTIC
Are diagnostic troublecodesoutputTROUBLE CODES.
SCAN TOOL Actuator test
07 motor. (Refer to
OK
NG
PROCEDURE FOR DIAGNOSTIC TROUBLE CODE
SCAN TOOL Special function
“Reset
Check trouble
OK
Check the engine coolant temperature circuit. (Refer to INSPECTION PROCEDURE 36.)
SCAN TOOL INPUT STATE TESTS
list) position switch (transaxle range switch)
(Refer to
OK Checktransaxle range sensorcircuit.
INSPECTION
PROCEDURE 25.)
Check the throttle body minimum air flow.
(Refer to
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ENGINE (NON-TURBO)>
INSPECTION PROCEDURE 29
S c a n t o o l : I n s p e c t i o n w h e n n o i n i t i a l c o m b u s t i o n oc c u r s .
SCAN TOOL SENSOR READ TESTS
list)
10 Battery voltage (Refer to
OK
Check the power supply system and circuit.
(Refer to INSPECTION PROCEDURE 23.)
Does the camshaft rotate, while cranking the engine (When oil filler cap is removed.) Check fming belt for breakage.’
SCAN TOOLDTC
INSPECTION PROCEDURE FOR DIAGNOSTIC TROUBLE CODES.Are the diagnostic trouble codes output( R e f e r t o
SCAN TOOL SENSOR READ TESTS (Data list) Check no crank reference signal
at’(Refer to 17 Engine speedINSPECTION TROUBLE CODES Cranking speed is displayed.
SCAN TOOL Actuator teNGCheck the fuel pump system:51 Fuel pump relay (Refer to (Refer to INSPECTION 24.)
SCAN TOOL SENSOR
Check theengine coolant temperatureSensor(Refer to INSPECTION PROCEDURE 38.)
INSPECTION PROCEDURE 30
Scan tool: Inspection when incomplete combustion o ccurs.
SCAN TOOL
Refer to C H A R T F O R Are diagnostic trouble code outputTROUBLE CODES.
SCAN TOOL Actuator NG
51 Fuel pump relay (Refer to Check the fuel pump system. (Refer to INSPECTION PROCEDURE 24.)
OK ,
SCAN TOOL SENSOR NGCheck the engine coolant temperature sensor circuit .
(Refer to INSPECTION PROCEDURES 38.)
INSPECTION PROCEDURE 31.
Inspection when hunting occurs.
,
Check the body minimum air flow.
(Refer to
Check trouble symptom.
NG
Inspect air intake system for vacuum leaks.
l Broken intake manifold gasket
l Broken air intake hose
l Broken vacuum hose
lPositive crankcase ventilation valve does not opera te.
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ENGINE (NON-TURBO)>
INSPECTION PROCEDURE 32Scan tool: Inspection when idle speed is unstable.
SCAN TOOL SENSOR READ TESTS (Data list)
27
air temperature (Refer to . .
SCAN TOOL SENSOR 11 MAP sensor reading (Refer to
NG CheckMAP sensor circuit.( R e f e r t o I N S P E C T I O N
SCAN TOOL SENSOR NGCheck the engine coolant temperature sensor (Refer to PROCEDURE-%)
SCAN TOOL Actuator test11 Evaporative purge solenoid (Refer toCheck the EVAP solenoid PROCEDURE FOR DIAGNOSTIC
SCAN TOOL SENSOR READ TESTS (Data list)
63 sensor volts (rear) (Refer to l Transaxle gear
Check the heated oxygen sensor (rear) (Refer to P. I N S P E C T I O N . . range l Drive with wide open throttle
OK: 1,000
SCAN TOOL SENSOR READ TESTS (Data list)NG
02 sensor volts (front) (Refer to Check the heated oxygen ‘sensor
OK: during sudden racing (Refer to
SCAN TOOL SENSOR READ TESTS (Data list)
02 sensor volts (front) (Refer to Changes between and ,000 OK:during idling Check the fuel pressure.
(Refer to
SCAN TOOL OUTPU A/C clutch relay (Refer to
SCAN TOOL INPUT STATE TESTS (Data list) Park/neutral switch (transaxle range switch)
(Refer to
OK
Check the throffle body minimum air flow.
(Refer to
. . .
. .
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(NON-TURBO)> .
INSPECTION PROCEDURE 33
Scan tool: Inspection when engine. stalls when, engine warm
SCAN TOOL SENSOR READ TESTS (Data list)
27 air temperature sensor (Refer to
.
SCAN TOOL SENSOR N G ’ Check the MAP sensor circuit
11 MAP sensor reading (Refer to
(Refer to INSPECTION
SCAN TOOL SENSOR Check the engine coolant temperature sensor circuit . (Refer to INSPECTION PROCEDURE 38.) .
SCAN TOOL SENSOR READ TESTS (Data list)
63 sensor volts (rear) (Refer to l Transaxle gear range l with wide open throttle
OK: 1,000
OK
SCAN TOOL SENSOR READ TESTS (Data list)
02 sensor volts (front) (Refer to OK: Changes between 1,000 during sudden
racing
OK Check the heated oxygen sensor (rear) circuit.
(Refer to
INSPECTION ,
SCAN TOOL SENSOR READ TESTS (Data list)
02 sensor volts (front) (Refer to OK: Changes between and 1,000 during idling
SCAN TOOL INPUT STATE TESTS (Data
list)Al Power steering switch (Refer to
Check the fuel pressure. (Refer to
,
Check the power steering switch (Refer INSPECTION PROCEDURE FOR DIAGNOSTIC TROUBLE CODE
.
SCAN TOOL OUTPUT
A/C clutch relay (Refer to
OK
NGCheck the switch and ( R e f e r t o .
SCAN TOOL INPUT STATE TESTS (Data list) Park/neutral switch (transaxle range switch)
(Refer to (Refer toINSPECTION PROCEDURE 25.)
OK
Check the throttle body minimum air flow. to I
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E N G I N E
INSPECTION PROCEDURE 35
Scan tool: Inspection when surge occurs.
SCAN TOOL SENSOR READ TESTS (Data list)
27 Intake air temperature sensor (Refer to
Check the intake air’ (Refer to INSPECTION. PROCEDURE 39.)
SCAN TOOL SENSOR 11 MAP sensor reading (Refer to
OK NG
Check the MAP sensor it.(Refer to INSPECTION PROCEDURE 40.)
SCAN TOOL SENSOR READ
N GCheck the engine coolant temperature sensor circuit
.
(Refer to INSPECTION PROCEDURE 38.)
SCAN TOOL SENSOR NGCheck the position circuit.
07 Throttle position sensor (Refer to(Refer to INSPECTION PROCEDURE 43.)
SCAN TOOL Actuator test
16 EGR solenoid (Refer to
OK Check the EGR solenoid circuit- (Refer to
INSPECTIONPROCEDURE FOR DIAGNOSTIC TROUBLE CODE
SCAN TOOL SENSOR READ TESTS (Data list)
63 sensor volts (rear) (Refer to l Transaxle gear range l with wide open throttle
OK:
NG
(Refer to INSPECTION PROCEDURE 41.)
SCAN TOOL SENSOR READ TESTS (Data list)
02 sensor volts (front) (Refer to OK: Changes between 1,000 during sudden
racing
Check the heated oxygen sensor (front) (Refer to PROCEDURE 42.)
SCAN TOOL SENSOR 02 sensor (front) (Refer toOK: Changes between and during idling Check the fuel pressure.
(Refer to
INSPECTION PROCEDURE 36
Check the fuel pump circuit.
Measure at the fuel pump connector
Check the harness wire between fuel pump-and lDisconnect the connector and measure at the harness necessary.
side.
l Continuity between 2 and ground
O K :
OK
Check the following connectNG Repair
OK
Check trouble symptom.
NG
Check the harness wirerelay and fuel pumpconnector.
OK
N G Repair
Replace the fuel pump.
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E N G I N E
INSPECTION PROCEDURE 38
Check the engine coolant temperature sensor circuit. , , I
Checktheenginecool
NG Replace
OK
Measure at the engine coolant temperature sensor co nnector
lDisconnect the connector, and measure at the harnes s side.
l Voltage between 2 and ground (Ignition switch: ON)
OK: 4.7-5.2
Continuity between 1 and ground OK: Continuity
Check the following connectors:
Repair
Check the harness wire between the PCM and the engi ne coolanttemperature sensor connector.I
Check the following connector:
OK
OKN G
Replace the PCM.
NG Repair
Check trouble symptom.
N G
Replace the PCM.
INSPECTION PROCEDURE 391
Check the intake air temperature sensor circuit.
NGCheck the intake air temperature sensor. (Refer to Replace
NGMeasure at the intake air temperature sensor connec tor Check the following connectors: lDisconnect the connector and measure at the harness side:
l Voltage between 2 and ground (Ignition switch: ON)
OK: 4.7-5.2
l Continuity between 1 and ground
OK: Continuity
OKCheck the harness wire between thePCM and the intake temperature sensor connector.
OK
I Replace the PCM.IRepair
Check the following connector:
OK
NG Repair
Check trouble symptom.
Replace the PCM.
NG
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ENGINE (NON-TURBO)> Troubleshooting
SENSOR READ TESTS (DATA LIST) REFERENCE TABLE
Caution
1. When shifting the select lever to range, the brakes should be applied so that the
does not move forward.
2. When checking while driving the vehicle, always be sure to have two
vehicle.
Inspection
No.itemInspection contents
Normal conditionp r o c e d u r e
N o .
Engine: WarmWhen at 4000 Air/fuel mixture
engine is suddenly 200 or less
made leaner
decelerated.when
decelerating, and
sensor is made richer
When engine is 1,000
voltswhen racing.
suddenly raced.
(Heated
oxygenEngine: Warm
The heatedsensoroxygen sensor Engine: Idlefront)signal is used to
400 or less to
check the air/fuel
1,000
mixture ratio, and (Changes)
control condition is also checked Engine: 2000
by the PCM.
When engine coolant
t e m p e r a t u r e i s
When engine coolant
t e m p e r a t u r e i s
Engine
coolantIgnition switch: ON When engine coolant
or with engine run- temperature is
ture sensorning
When engine coolant
t e m p e r a t u r e i s
When engine coolant
t e m p e r a t u r e i s
Throttle Set to idle position.
400 or more
position Ignition switch: ON
Open fully 3,800
or less
Minimum
throttle Engine: Idle (more than one minute) 1,000
KnockCode
sor voltsEngine: Idle Sudden racingvoltage increases
temporarily.
0Battery
voltage Ignition switch: ON
101
1
Altitude: Om (0 ft.)
reading
Ignition switch: ON (30Altitude:
(3937 ft.)88 (26
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ENGINE (NON-TURBO)>
I n s p e c t i o n
itemNo.Inspection contentsNormalconditionp r o c e d u r e
No.
12position
l Engine: IdlelA/C switch: OFF ON(A/C compressor activated) Step value
increases.
14
15
17
Adaptivel Engine: Warm, 2,500 Increases
fuel factor
Disconnect any injector connector. gradually
Altitude: Om (0 ft.) 101Barometric
Ignition switch: ON (30
pressureAltitude:
0 8
(3,937 ft.)
88 (26
C o d eEngine
speedEngine: Warm, idle 100
When intake air tem-
p e r a t u r e i s
When intake air tern-
perature is
When intake air
Intake airIgnition switch: ON
e n g i n e r u n - is
temperature
When intake air tem-
peratureis
36
Charging
system
goal
When intake air tem-
peratureis
Code No.
Engine: 2,500 Indicates battery
voltage
Roughly
Batterys a m e t e m p e r a -
temperature Ignition switch: ON
ture as the
battery area
Engine coolant tem-
perature: Less than OPEN-LOOP
Fuel control
status Engine: 2,500 Engine coolant tem-
.
perature: More than CLOSED-LOOP
sensor
volts
(Heated
oxygen
sensor
rear)
l Transaxle: gear Engine: 3,500 or 000 range l Drive with more
open throttle
Actual vehicle
Vehicle
speedDrive at a constant speed. speed the
s p e e d o m e t e r a r e .
the same.
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ENGINE (NON-TURBO)> , ,
OUTPUT STATE TESTS (DATA LIST) REFERENCE TABLE
Item Inspection
No. itemInspection contentsNormal condition ,
No.
TorqueWhen running at constant speed
reduction,
linkWhen shiftingUP, DOWN
A/C switch: OFFOFF
A/C clutch
relayEngine: IdleA/C switch: ON (A/C ON
compressor activated)
relayIgnition switch: ON
OFF
Engine: Cranking or idle
Engine: WarmRight after starting en-
gine
tive purge
solenoid
Engine: Warm1 0 s e c o n d s o r m o r e
after starting engine
Engine: Warm, idleON
E G R s o l e -OFFSlight racing (Engine: 2,000 or more)( m o m e n t a r i l y ). ..
Radiator fan: Not activated [Engine coolant
Radiator temperature: Less than approx. (176” F)]
fan lowRadiator operates at low speed [Engine coolantspeed relaye m p e r a t u r e i s or less, A/C ON
switch: ON]
Radiator fan: Not activated [Engine OFF
Radiatortemperature: Less than approx.
fan high
speed relay Radiator operates at high speed.
ngine coolant temperature is (220” F)ON
or more, A/C switch: ON]
Fuel pumpIgnition switch: ON
OFF
relayEngine: Cranking or idleON
(CheckIgnition switch: OFF ON
ON OFF
engine)(Everything is OK and DTC is not memorized) (Severa l minutes
lamp later)
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On-vehicle Inspection of
ENGINE
TEMPERATURE SENSOR
CHECK
1. Disconnect the engine coolant temperature sensor
connector.
2. Measure the resistance between the sensor terminals.
INSTALLATION
1. Apply sealant to threaded
Specified sealant: Loctite 24200 or equivalent
2.
engine coolant sensor tighten
it to specified torque.
Sensor tightening torque: 7 (5
3. Fasten harness connectors securely.
THROTTLE POSITION SENSOR CHECK
1. the throttle position sensor connector.
2. Measure the resistance between the throttle posi tion
sensor side connector terminal 1 and terminal 3.
Standard value:
3. Measure the resistance between the throttle
sensor side, connector terminal 2 terminal 3.
Throttle valve slowly open until
fully open from the idle positionChanges smoothly in
t o t h e
angle of the
4. If the resistance is outside the standard value, ‘if it
doesn’t change smoothly, replace the throttle posit ion
sensor.
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