engine MITSUBISHI SPYDER 1990 Service Repair Manual

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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ENGINE (NON-TURBO)> Troubleshooting
INSPECTION PROCEDURE 34
Scan tool: Inspection when hesitation, sag, stumbl e or poor acceleration occurs.’
N G
27 Intakeair temperature (Refer toCheck the intake air (Refer to PROCEDURE 39.)
OK
SCAN TOOL SENSOR11 MAP sensor reading. (Refer to Check the MAP sensor . .
(Refer to INSPECTION PROCEDURE 40.)
NG.
Check the engine (Refer to INSPECTION PROCEDURE
OK
N G
07 Throttle position sensor (Refer toC h e c k t h e position sensor (Refer to I N S P E C T I O N 43.)’ I
SCAN TOOL Actuator testN GINSPECTION16 EGR solenoid (Refer to
OK
SCAN TOOL SENSOR READ TESTS (Data list)
63 sensor (rear) (Refer to Transaxle gear range l Drive with wide open OK: ,000
Check the EGR solenoid circuit. (Refer to PROCEDURE FOR DIAGNOSTIC TROUBLE CODE
Check thesensor circuit.heated oxygen(rear)
. --.
SCAN TOOL SENSOR 02 sensor volts (front) (Refer toOK: Changes between 1,000 during sudden
racing
, , ,
Check the heated oxygeri sensor (front) circuit.
(Refer to INSPECTION PROCEDURE 42.)
SCAN TOOL SENSOR READ TESTS (Data list)
02 sensor volts (front) (Refer to
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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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ENGINE (NON-TURBO)> Troubleshooting
INSPECTION PROCEDURE 37
Check the fuel pump drive control circuit.
C h e c k t h e -
II
Measure at the fuel pump relay connector lDisconnect the connector and measure at the harness
side.
1. Voltage between 6 and ground switch: ON)
OK: Battery positive voltage
2. Voltage between 6 and ground OK:
voltaae
OK
. .
Check the ignition switch. to
Check the following
Check trouble symptom.
Check the harness wire between the battery
fuel ‘pump relay
connector. Repair, if necessary
Measure at the PCM connector NG Check the following con- & p a i rlDisconnect the connector and measure at the harnessside.O KlVoltage between 74 and ground (Ignition switch: ON)
OK: positive voltage
Check trouble symptom.
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OKNG
Check the harness wire between fuel relay Repair, if necessary.
NG
Check the following connector: Repair
OK
Check trouble symptom.
Replace the PCM.
NG

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
INSPECTION PROCEDURE 42
Check the heated oxygen sensor (front) circuit.
Measure at the heated (front) connector lDisconnect the connector and measure at the harness side.
l Continuity between 2 and ground
OK: Continuity
NG Check the following connector:
OK
Check trouble symptom.
NG Replace
OK
Check the harness wire between the PCM and heated o xygen
sensor (front) connector. Repair, if
Check the following connector:
OK
NG
Check trouble symptom.
NG NG
Check the harness wire between the PCM and the heat ed oxygen Repair
sensor (front) connector.
OK
Replace the PCM.
INSPECTION PROCEDURE 43
Check the throttle position sensor circuit.
Check the following connectors:
Check the harness wire between the PCM and position
Check the following connector:
OK
Check trouble symptom.
OK
Replace the PCM.Repair
N G
Check the harness wire between the PCM and position
sensor connector. Repair, if necessary. . .
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ENGINE (NON-TURBO)>
INSPECTION PROCEDURE 44
Check the vehicle-speed sensor and speedometer.
Measure at the speed sensor connector l Disconnect the connector and measure at the harness side.
l Voltage between 1 and ground (Ignition switch: ON)
OK: 8.5-9.5
l Continuity between 2 and ground
OK: Continuity
OK
C h e c k t h e
Check the harness wire PCM and the speed connector. Repair, if necessary.
Check the followina connector: NG Repair
OK
Check trouble symptom.
NG
NG
Check the harness wire between the PCM and the spee d sensor Repairconnector.
SCAN TOOL SENSOR (Data list)65 Vehicle speed
l Is actual vehicle soeed indicated durina drivina?I
No
Check the speedometer circuit.
(Refer to INSPECTION PROCEDURE 45.)I
OK
Replace the vehicle speed sensor.
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SCAN TOOL SENSOR READ TESTS (Data list)
65 Vehicle speed
l
Is actual vehicle speed indicated during driving?
No
Yes Replace the PCM.
. . .
NG I):
Repair. .
. -
Check trouble symptom. , .
NGCheck the harness wire between the PCM and the tran saxle control Repairmodule connector.
OK
INSPECTIONPROCEDURE 45.)
OK
Check the automatic transaxle control system.

ENGINE (NON-TURBO)> Troubleshooting
INSPECTION PROCEDURE 45Check the speedometer.
A-l A-l 07,
OK
Check trouble symptom.
NG
Check the harness wire between the PCM and the comb ination
meter. Repair, if necessary.
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.