1990 MITSUBISHI SPYDER coolant temperature

ENGINE (TURBO)
AND Troubleshooting
INSPECTION PROCEDURE 9
speed is high. (Improper idle speed)
[Comment]
In such cases as the above, the cause is probably that the intake air volume during idle is too
great.
YES
Refer to INSPECTION CHART FOR Are diagnostic troublecodesoutputTROUBLE CODES.
Check the idle air control motor for operation sound Engine (Turbo)>. (Refer to Check the idle air control motor for operation sound Engine>. (Refer to
OKCheck the idle control system malfunction (Refer
INSPECTION PROCEDURE FOR DIAGNOSTIC TROUBLE CODE
NGSCAN TOOL Data list Check the closed throttle position 26 Closed throttle position switch (Refer to (Refer to INSPECTION PROCEDURE FOR TROUBLE CODE
SCAN TOOL Data listNG Check the engine coolant’ temperature 21 I N S P E C T I O N
P R O C E D U RE
OKTROUBLE CODES
SCAN TOOL Data list
28 A/C switch (Refer to
OK
Adjust the basic idle speed. (Refer to
Check the A/C switch and clutch to INSPECTION PROCEDURE 32.)
Check trouble symptom.
N G
Clean the throttle valve area. (Refer to
Check and the fixed SAS. (Refer to .
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ENGINE (TURBO)
AND
ENGINE> Troubleshooting
INSPECTION PROCEDURE 10
Idle speed is low. (Improper idle speed)“ P r o b a b l e c a u s e , .
[Commentjl Malfunction of the systemIn cases such as the the cause is probably that the intake air volume d uring idling is l of throttle small.
SCAN TOOL DTCYES
Are diagnostic trouble codesoutputRefer to I N S P E C T I O N C H A R T TROUBLE CODES.
NO
Check the idle air control motor for operation soun d Engine (Refer to Check the idle air control motor for operation sound (Refer to
OK
SCAN TOOL Data listNG
26 Closed positionswitch(Refer to
Check the idle control system to INSPECTION PROCEDURE FOR DIAGNOSTIC
,
Check the closed position switch system.(Refer to PROCEDURE FOR T R O U B L E C O D E
SCAN TOOL Data list21 Check the engine coolant temperature circuit malfu nction. (Refer I N S P E C T I O N P R O C E D U R E TROUBLE CODES 15.)
SCAN TOOL Data listNG
29 Park/neutral position switch (Refer toCheck the ignition switch-ST and park/neutral posit ion system.(Refer to INSPECTION PROCEDURE ,
OK
Adjust the basic idle (Refer to
Clean the throttle valve area. to
I
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Check and adjust the fixed SAS. (Refer to
.

ENGINE (TURBO)
AND ENGINE> Troubleshooting
INSPECTION PROCEDURE 11
When the engine is cold, it stalls at idle. (Die out)P r o b a b l e c a u s e .
[Comment]l Malfunction of the system
In such cases as the above, the cause is probably t hat the mixture is inappropriate whenl the bodythe engine is cold, or that the intake air volume is insufficient.l Malfunction of the injector system Malfunction of the s y s t e m
W ere the battery terminals disconnected recently
NO
After warming-up, let the engine run at idling for 10 minutes.
SCAN TOOL DTC
Are diagnostic trouble codesoutput?Refer to INSPECTION CHART FOR TROUBLE CODES.
(Refer to Check and adjust the (Refer to ,
NO
Is engine-idling stable after the warming-up
YES(Refer to INSPECTION PROCEDURE
Check the idle air control motor for operation soun d NG
Engine (Turbo)>. (Refer to Check the idle air control motor for operation sound (Refer to
Checktheinjectorforope
OK
Check the idle control system malfunction to .INSPECTION PROCEDURE FOR DIAGNOSTIC TROUBLE CODE
PROCEDURE FOR DIAGNOSTIC TROUBLE CODES
SCAN TOOL Data list Check the closed position switch system.
26 Closed throttle position switch (Refer to INSPECTION PROCEDURE FOR
OKTROUBLE CODES
SCAN TOOL Data listN G Check the engine coolant temperature circuit malfu nction. (Refer to21 Enginecoolanttemperaturesensor P. I N S P E C T I O N P R O C E D U R E F O R TROUBLE CODES
Check the fuel pressure. (Refer to I
Check the ignition timing. Engine Check that the position sensor and belt cover are
(Refer to GROUP
(Refer to GROUP Check the ignition timing. Engine>
Check the following items.
l Check the ignition coil, spark plugs, spark plug ca bles.
l Check the compression pressure.
l Check the engine oil viscosity.
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ENGINE (TURBO)
AND ENGINE> Troubleshooting
INSPECTION PROCEDURE 22
Too high CO and HC concentration when idling
[Comment]Malfunction of the ratio
Abnormal air-fuel ratio is suspected.
SCAN TOOL Are diagnostic trouble codes output
N O
YES Refer to INSPECTION CHART FOR DIAGNOSTICTROUBLE CODES.
Check the ignition timing. Engine (Turbo)>NG
(Refer to GROUP On-vehicle Service.) Check that the crankshaft position sensor and belt installedCheck the ignition timing. Engine>(Refer to GROUP 11 On-vehicle Service.)
OK
NGSCAN TOOL Data list
21 Engine coolant temperature sensor. Check the engine coolant temperature malfunction. (Refer to
(Refer to INSPECTION PROCEDURE FOR DIAGNOSTIC
TROUBLE CODES
OK
SCAN TOOL Data listNG Check the intake air temperature (Refer to
13 Intake air temperature sensor (Refer to INSPECTION PROCEDURE FOR DIAGNOSTIC
OK TROUBLE CODE
SCAN TOOL Data list
25 Barometric pressure sensor (Refer to
OK
Check the pressure circuit malfunction. INSPECTION PROCEDURE FOR DIAGNOSTIC TROUBLE CODE
SCAN TOOL Data listNGCheck the oxygen sensor circuit malfunction (bank sensor 2). (Refer59 Heated oxygen sensor (rear) (Refer to to INSPECTION PROCEDURE FOR DIAGNOSTIC
l Transaxle gear TROUBLE CODE ranae l Driving with the throttle wide open
O K :
OK
SCAN TOOL Data list NG
Heated oxygen sensor (front) (Refer to OK: 1,000 when racing suddenly
OK
SCAN TOOL Data list11 Heated oxygen sensor (front) (Refer to O K : and
Check the oxygen sensor circuit malfunction (bank 1 sensor 1). INSPECTION PROCEDURE FOR DIAGNOSTICTROUBLE CODE
alternately when idling.
NG
Check the fuel pressure. (Refer to
Check the following items.
l Check the injectors for operation sound.
l Check the injectors for fuel leakage.
l Check the ignition coil, spark plugs, spark plug ca bles.
l Check the compression pressure.
l Check the positive crankcase ventilation system.
l Check the evaporative emission control system.
l Check the
system.I
Check trouble symptom.
Replace the three-way converter.
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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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