sensor MITSUBISHI MONTERO 2000 Service Repair Manual

GDI -Troubleshooting <A/T>13A-173
NGReplace the injector.Check the trouble symptoms.
OK
Check the following items in that order.
DCheck the sparkplug
DCheck the compression pressure
DCheck the fuel lines for clogging.
DCheck if foreign materials (water, alcohol, etc.) got into
fuel.
OK
Check ignition coil spark for each cylinder.
1. Remove the ignition coil.
2. Install a new sparkplug to the removed ignitioncoil.
Caution
Never touch the connector terminal as approx. 100 V is
applied to the injector, or you are seriously injured.
3. Disconnect the injector intermediate connector.
4. Earth the sparkplug electrodesecurely.
5. Check that the sparkplug igniteswhen theengine is
cranked.NGReplace the ignition coil.
Check the ignitiontimingwhen cranking.
OK:
Approx. 5_BTDCNGCheck that the crankanglesensor andtiming beltcover are
installed properly.
NO
Adjust the throttle position sensor (Refer to P.13A-220.)
OK
Is starting good if the engine iscranked with the accelerator
pedalslightly depressed?YESDClean the throttle valve area. (Refer to P.13A-220)
DAdjust the throttle position sensor
(Refer to P.13A-220.)
OK
MUT-
IIData list
79 Throttle position sensor (1st channel) (Refer to P.13A-198.)NGCheck the throttle valve position feedback system.
(Refer to P.13A-162, code No.92.)
OK
Check fuel leakage. (Refer to P.13A-225.)NGRepair
OK
MUT-
IIActuator Test
74 Fuel pressure sensor (Refer to P.13A-203.)NGCheck abnormal fuel pressure.
(Refer to P.13A-151, code No.56.)
OK
MUT-
IIData list
18 Cranking signal (Refer to P.13A-198.)NGCheck the ignition switch-ST system and inhibitor switch
(Refer to 13A-191, Inspection procedure 27.)
From the previouspage


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GDI -Troubleshooting <A/T>13A-174
Inspection procedure 7
Unstable idling (Rough idling, hunting)
Probable cause
The cause is probably a malfunction of the ignition system, air/fuel ratio control
system, electronic controlled throttle valve system, compression pressure, etc. As
many causes can be suspected, diagnose from easier items.DMalfunction of the ignition system
DMalfunction of the air/fuel ratio control system
DMalfunction of the electronic-controlled throttle
valve system
DPoor compression
DAir sucking into the air intake system
OK
Check that air is sucked in the air intake system.
DBroken intake manifold gasket
DDamaged vacuum hose
DDamaged air intake hoseOK
To the nextpage
OK
MUT-
IIData list
11 Oxygen sensor (Refer to P.13A-198.)
OK:
0 - 400 mV and 600 - 1,000 mV alternates when
the engine is idling(wait for 2 minutes after the en-
gine is started).NGMeasure fuel high-pressure between the fuel pump (high
pressure) and injector. (Refer to P.13A-222.)
OK
MUT-
IIData list
11 Oxygen sensor (Refer to P.13A-198.)
OK:
600 - 1,000 mV when theengine is suddenlyracedNG11 Oxygen sensor system check
(Refer to P. 13A-131, code No.11.)
OK
MUT-
IIActuator Test
08 Purge control solenoid valve (Refer to P.13A-203.)NGCheck the purge control solenoid valve system
(Refer to P.13A-197, Inspection procedure 36.)
OK
MUT-
IIData list
21 Engine coolant temperature sensor (Refer to P.13A-198.)NGCheck theengine coolant temperaturesensor system (Refer
to P.13A-138, code No.21.)
OK
MUT-
IIData list
25 Barometric pressure sensor (Refer to P.13A-198.)NGCheck the barometric pressure sensor system (Refer to
P.13A-145, code No.25.)
OK
MUT-
IIData list
13 Intake air temperature sensor (Refer to P.13A-198.)NGCheck the intake air temperature sensor system (Refer to
P.13A-135, code No.13.)
NO
MUT-
IIData list
26 Acceleratorpedal positionswitch (Refer to P.13A-198.)NGCheck the acceleratorpedal positionswitch system (Refer to
P.13A-192, Inspection procedure 28.)
OK
Does theidlingspeed fluctuate excessively?YESDClean around the throttle valve. (Refer to P.13A-220)
DAdjust the throttle position sensor (Refer to P.13A-220.)
NO
MUT-
IIData list
79 Throttle position sensor (1st channel) (Refer to P.13A-198.)NGCheck the throttle valve position feedback system
(Refer to P.13A-162, code No.92.)
NO
MUT-
IISelf-Diag Code
Is a diagnosis code set?YESRefer to P.13A-130, INSPECTION CHART FOR DIAGNOSIS
CODES.
Has the batterybeen disconnectedrecently?YESAfter warming-up, let theengine run at idling for 10 minutes.


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GDI -Troubleshooting <A/T>13A-175
OK
NG
Air is sucked in the air intake system, or EGR gas leaks.
DBroken intake manifold gasket
DDamaged air intake hose
DDamaged vacuum hose
DFaulty EGR valve seat
Check the trouble symptoms.
OK
Check the following items in that order.
DCheck the sparkplug
DCheck the exhaust gas emission control system
DCheck the EGR control system
DCheck the compression pressure
DCheck if foreign materials (water, kerosine,etc.) got into
fuel.
OK
Check ignition coil spark for each cylinder.
1. Remove the ignition coil.
2. Install a new sparkplug to the removed ignitioncoil.
3. Disconnect the injector intermediate connector.
Caution
Never touch the connector terminal as approx. 100 V is
applied to the injector, or you are seriously injured.
4. Earth the sparkplug electrodesecurely.
5. Check that the sparkplug igniteswhen theengine is
cranked.NGReplace the ignition coil.
Clean around the throttle valve. (Refer to P.13A-220.)
OK
Check the ignition timing. (Refer to GROUP 11A - Engine
Adjustment.)NGCheck that the crankanglesensor andtiming beltcover are
properly installed.
OK
MUT-
IIData list
68 EGR valve (Refer to P.13A-198.)NGCheck the EGR valve system (Refer to P.13A-196, Inspection
procedure 35.)
OK
MUT-
IIData list
14 Throttle position sensor (2nd channel)
After warming-up, let theengine run at idlingwith no load.
OK:
When idling, 3,900 - 4,800 mVNGDClean around the throttle valve. (Refer to P.13A-220)
DAdjust the throttle position sensor (Refer to P.13A-220.)
OK
MUT-
IIData list
67 Stoplampswitch (Refer to P.13A-198.)NGCheck the stoplampswitch system
(Refer to P.13A-195, Inspection procedure 32.)
OK
MUT-
IIData list
28 A/C switch (Refer to P.13A-198.)NGCheck the A/C switch and A/C relay system
(Refer to P.13A-194, Inspection procedure 31.)
OK
MUT-
IIData list
27 Power steering oil pressure switch (Refer to P.13A-198.)NGCheck the power steering oil pressure switch system (Refer to
P.13A-194, Inspection procedure 30.)
From the previouspage
OK
MUT-
IIData list
31 Small lampswitch (Refer to P.13A-198.)NGCheck the smalllampswitch system
(Refer to P.13A-195, Inspection procedure 33.)


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GDI -Troubleshooting <A/T>13A-176
Inspection procedure 8
Idling speed is high or low (Improper idling speed)
Probable cause
The cause is probably that the intake airamount during idling is too great or too
small.DMalfunction of the electronic-controlled throttle
valve system
DMalfunction of the throttle body
OK
DClean around the throttle valve. (Refer to P.13A-220.)
DAdjust the throttle position sensor (Refer to P.13A-220.)
OK
MUT-
IIData list
67 Stoplampswitch (Refer to P.13A-198.)NGCheck the stoplampswitch system
(Refer to P.13A-195, Inspection procedure 32.)
OK
MUT-
IIData list
28 A/C switch (Refer to P.13A-198.)NGCheck the A/C switch and A/C relay system
(Refer to P.13A-194, Inspection procedure 31.)
OK
MUT-
IIData list
21 Engine coolant temperature sensor (Refer to P.13A-198.)NGCheck theengine coolant temperaturesensor system (Refer
to P.13A-138, code No.21.)
OK
MUT-
IIData list
26 Acceleratorpedal positionswitch (Refer to P.13A-198.)NGCheck the acceleratorpedal positionswitch system
(Refer to P.13A-192, Inspection procedure 28.)
OK
MUT-
IIActuator Test
08 Purge control solenoid valve (Refer to P.13A-203.)NGCheck the purge control solenoid valve system
(Refer to P.13A-197, Inspection procedure 36.)
MUT-
IISelf-Diag Code
Is a diagnosis code set?YESRefer to P.13A-130, INSPECTION CHART FOR DIAGNOSIS
CODES.
NO
MUT-
IIData list
79 Throttle position sensor (1st channel) (Refer to P.13A-198.)NGCheck the throttle valve position feedback system
(Refer to P.13A-162, code No.92.)


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GDI -Troubleshooting <A/T>13A-177
Inspection procedure 9
When the engine is cold, it stalls at idling. (Die out)
Probable cause
In such cases as the above, the cause is probably that the air/fuel mixture is
inappropriate when theengine iscold, or that the intake air volume is
insufficient.DMalfunction of the electronic-controlled throttle
valve system
DMalfunction of the throttle body
OK
NG
Replace the injector.
Check the trouble symptoms.
Check the following items in that order.
DCheck the sparkplug
DCheck the compression pressure
DCheck theengine oilviscosity.
OK
Check ignition coil spark for each cylinder.
1. Remove the ignition coil.
2. Install a new sparkplug to the removed ignitioncoil.
3. Disconnect the injector intermediate connector.
Caution
Never touch the connector terminal as approx. 100 V is
applied to the injector, or you are seriously injured.
4. Earth the sparkplug electrodesecurely.
5. Check that the sparkplug igniteswhen theengine is
cranked.NGReplace the ignition coil.
OK
Check the ignition timing. (Refer to GROUP 11A - Engine
Adjustment.)NGCheck that the crankanglesensor andtiming beltcover are
properly installed.
NO
Measure fuel high-pressure between the fuel pump (high
pressure) and injector. (Refer to P.13A-222.)
OK
Does theenginestall right after the acceleratorpedal is
released?YESDClean around the throttle valve. (Refer to P.13A-220.)
DAdjust the throttle position sensor. (Refer to P.13A-220.)
OK
MUT-
IIData list
68 EGR valve (Refer to P.13A-198.)NGCheck the EGR valve system.
(Refer to P.13A-196, Inspection procedure 35.)
OK
MUT-
IIData list
21 Engine coolant temperature sensor (Refer to P.13A-198.)NGCheck theengine coolant temperaturesensor system.
(Refer to P.13A-138, code No.21.)
OK
MUT-
IIData list
26 Acceleratorpedal positionswitch
(Refer to P.13A-198.)NGCheck the acceleratorpedal positionswitch system.
(Refer to P.13A-192, Inspection procedure 28.)
NO
MUT-
IIData list
14 Throttle position sensor (2nd channel) (Refer to P.13A-198.)NGCheck the throttle valve position feedback system.
(Refer to P.13A-162, code No.92.)
NO
Is engine-idling stable after the warming-up?YESCheck the unstableidling (rough, hunting).
(Refer to P.13A-174, Inspection procedure 7.)
NO
MUT-
IISelf-Diag Code
Is a diagnosis code set?YESRefer to P.13A-130, INSPECTION CHART FOR DIAGNOSIS
CODES.
Has the batterybeen disconnectedrecently?YESAfter warming-up, let theengine run at idling for 10 minutes.


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GDI -Troubleshooting <A/T>13A-178
Inspection procedure 10
When the engine becomes hot, it stalls at idling. (Die
out)
Probable cause
In such cases as the above, the cause is probably that ignition system, air/fuel
mixture, electronic-controlled throttle valve system, compression pressure is
defective. In addition, if the engine suddenlystalls, the cause may also be a
defective connector contact.DMalfunction of the ignition system
DMalfunction of the air/fuel ratio control system
DMalfunction of the electronic-controlled throttle
valve system
DMalfunction of the throttle body
DImproper connector contact
DDrawing air into intake system
OK
Check that air is sucked in the air intake system.
DBroken intake manifoldgasket
DDamaged vacuum hose
DDamaged air intake hoseOK
To the nextpage
OK
MUT-
IIData list
11 Oxygen sensor (Refer to P.13A-198.)
OK
0 - 400 mV and 600 - 1,000 mV alternates when
the engine is idling(wait for 2 minutes after the en-
gine is started).NGMeasure fuel high-pressure between the fuel pump (high
pressure) and injector. (Refer to P.13A-222.)
OK
MUT-
IIData list
11 Oxygen sensor (Refer to P.13A-198.)
OK
600 - 1,000 mV when theengine is suddenlyraced.NGCheck Oxygen sensor system
(Refer to P.13A-131, code No.11.)
OK
MUT-
IIData list
21 Engine coolant temperature sensor (Refer to P.13A-198.)NGCheck theengine coolant temperaturesensor system. (Refer
to P.13A-138, code No.21.)
OK
MUT-
IIData list
25 Barometric pressure sensor (Refer to P.13A-198.)NGCheck the barometric pressure sensor system.
(Refer to P.13A-145, code No.25.)
OK
MUT-
IIData list
13 Intake air temperature sensor (Refer to P.13A-198.)NGCheck the intake air temperature sensor system.
(Refer to P.13A-135, code No.13.)
YES
MUT-
IIData list
26 Acceleratorpedal positionswitch
(Refer to P.13A-198.)NGCheck the acceleratorpedal positionswitch system.
(Refer to P.13A-192, Inspection procedure 28.)
NO
MUT-
IIData list
79 Throttle position sensor (1st channel) (Refer to P.13A-198.)NGCheck the throttle valve position feedback system.
(Refer to P.13A-162, code No.92.)
NO
MUT-
IISelf-Diag Code
Is a diagnosis code set?YESRefer to P.13A-130, INSPECTION CHART FOR DIAGNOSIS
CODES.
Has the batterybeen disconnectedrecently?YESAfter warming-up, let theengine run at idling for 10 minutes.
OK
Does theenginestall easilyagain?NOWhile carrying out an intermittent malfunction simulation test
(Refer to GROUP 00 - Points to Note for Intermittent
Malfunctions.), check for sudden changes in the signals shown
below.
DCrankanglesensor signal
DInjector activating signal
DLow pressure fuelpumpdrive signal
DAir flow sensor
DPrimary ignition signal
DEngine-A/T-ECU power supply voltage


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GDI -Troubleshooting <A/T>13A-179
OK
Check the following items in that order.
DCheck the sparkplug
DCheck the compression pressure
DCheck if foreign materials (water, kerosine,etc.) got into
fuel.
OK
MUT-
IIData list
68 EGR valve (Refer to P.13A-198.)NGCheck the EGR valve system (Refer to P.13A-196, Inspection
procedure 35.)
OK
MUT-
IIData list
28 A/C switch (Refer to P.13A-198.)NGCheck the A/C switch and A/C relay system
(Refer to P.13A-194, Inspection procedure 31.)
OK
MUT-
IIData list
27 Power steering oil pressure switch (Refer to P.13A-198.)NGCheck the power steering oil pressure switch system (Refer to
P.13A-194, Inspection procedure30.)
From the previouspage
NO
Check the ignition timing. (Refer to GROUP 11A - Engine
Adjustment.)OKCheck that the crankanglesensor andtiming beltcover are
properly installed.
NG
Check ignition coil spark for each cylinder.
1. Remove the ignition coil.
2. Install a new sparkplug to the removed ignitioncoil.
3. Disconnect the injector intermediate connector.
Caution
Never touch the connector terminal as approx. 100 V is
applied to the injector, or you are seriously injured.
4. Earth the sparkplug electrodesecurely.
5. Check that the sparkplug igniteswhen theengine is
cranked.NGReplace the ignition coil.
OK
MUT-
IIData list
14 Throttle position sensor (2nd channel)
After warming-up, let theengine run at idlingwith no load.
OK:
3,900 - 4,800 mVNGDClean around the throttle valve. (Refer to P.13A-220)
DAdjust the throttle position sensor (Refer to P.13A-220.)
OK
MUT-
IIData list
34 Air flow sensor reset signal (Refer to P.13A-198.)NGCheck the air flow sensor system
(Refer to P.13A-133, code No.12.)
OK
Does theenginestall right after the acceleratorpedal is
released?YESClean around the throttle valve. (Refer to P.13A-220.)
OK
MUT-
IIData list
31 Small lampswitch (Refer to P.13A-198.)NGCheck the smalllampswitch system (Refer to P.13A-195,
Inspection procedure 33.)


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GDI -Troubleshooting <A/T>13A-181
Inspection procedure 12
The engine stalls when decelerating.
Probable cause
The cause is probably an improper air/fuel ratio due to a faulty EGR system, or
poor intake air volume due to a faulty electronic-controlled throttle valve system.DMalfunction of the electronic-controlled throttle
valve system
DMalfunction of the EGR valve
OK
Check the following items in that order.
DCheck the sparkplug
DClean around the throttle valve. (Refer to P.13A-220.)
DAdjust the throttle position sensor (Refer to P.13A-220.)
OK
Check ignition coil spark for each cylinder.
1. Remove the ignition coil.
2. Install a new sparkplug to the removed ignitioncoil.
3. Disconnect the injector intermediate connector.
Caution
Never touch the connector terminal as approx. 100 V is
applied to the injector, or you are seriously injured.
4. Earth the sparkplug electrodesecurely.
5. Check that the sparkplug igniteswhen theengine is
cranked.NGReplace the ignition coil.
NO
MUT-
IIData list
68 EGR valve (Refer to P.13A-198.)NGCheck the EGR valve system (Refer to P.13A-196, Inspection
procedure 35.)
OK
Check the vehicle speed sensor system
(Refer to P.13A-144, code No.24.)NGRepair
OK
MUT-
IIData list
79 Throttle position sensor (1st channel) (Refer to P.13A-198.)NGCheck the throttle valve position feedback system
(Refer to P.13A-162, code No.P92)
NO
MUT-
IIData list
26 Acceleratorpedal positionswitch (Refer to P.13A-198.)NGCheck the acceleratorpedal positionswitch system.
(Refer to P.13A-192, Inspection procedure 28)
NO
MUT-
IISelf-Diag Code
Is a diagnosis code set?YESRefer to P.13A-130, INSPECTION CHART FOR DIAGNOSIS
CODES.
Has the batterybeen disconnectedrecently?YESAfter warming-up, let theengine run at idling for 10 minutes.


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GDI -Troubleshooting <A/T>13A-182
Inspection procedure 13
Hesitation, sag, stumble, poor acceleration or surge
Probable cause
The cause is probably a malfunction of the ignition system, air/fuel ratio control
system, electronic controlled throttle valve system, compression pressure, etc.DMalfunction of the ignition system
DMalfunction of the air/fuel ratio control system
DMalfunction of the electronic-controlled throttle
valve system
DImproper compression pressure
DAir stuck in the air intake system
NO
NG
Check that the crankanglesensor andtiming beltcover are
properly installed.
OK
Check that air is sucked in the air intake system.
DBroken intake manifold gasket
DDamaged vacuum hose
DDamaged air intake hose
OK
To the nextpage
MUT-
IIData list
68 EGR valve (Refer to P.13A-198.)NGCheck the EGR valve system (Refer to P.13A-196, Inspection
procedure 35.)
OK
MUT-
IIData list
11 Oxygen sensor (Refer to P.13A-198.)
OK:
0 - 400 mV and 600 - 1,000 mV alternates when
the engine is idling(wait for 2 minutes after the en-
gine is started).NGMeasure fuel high-pressure between the fuel pump (high
pressure) and injector. (Refer to P.13A-222.)
OK
MUT-
IIData list
11 Oxygen sensor (Refer to P.13A-198.)
OK:
600 - 1,000 mV when theengine is suddenlyracedNGCheck the oxygen sensor system. (Refer to P.13A-131, code
No.11.)
OK
MUT-
IIData list
79 Throttle position sensor (1st channel) (Refer to P.13A-198.)NGCheck the throttle valve position feedback system (Refer to
P.13A-162, code No.92.)
OK
MUT-
IIData list
21 Engine coolant temperature sensor (Refer to P.13A-198.)NGCheck theengine coolant temperaturesensor system (Refer
to P.13A-138, code No.21.)
OK
MUT-
IIData list
25 Barometric pressure sensor (Refer to P.13A-198.)NGCheck the barometric pressure sensor system (Refer to
P.13A-145, code No.25.)
OK
MUT-
IIData list
13 Intake air temperature sensor (Refer to P.13A-198.)NGCheck the intake air temperature sensor system (Refer to
P.13A-135, code No.13.)
OK
MUT-
IIData list
26 Acceleratorpedal positionswitch
(Refer to P.13A-198.)NGCheck the acceleratorpedal positionswitch system.
(Refer to P.13A-192, Inspection procedure 28.)
Check the ignition timing. (Refer to GROUP11A - Engine
Adjustment)
MUT-
IISelf-Diag Code
Is a diagnosis code displayed?YESRefer to P.13A-130, INSPECTION CHART FOR DIAGNOSIS
CODES.
OK


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GDI -Troubleshooting <A/T>13A-183
OK
Check the following items in that order.
DCheck the sparkplug
DCheck the EGR control system
DCheck the compression pressure
DCheck the fuel filter or fuelline for clogging
OK
Check ignition coil spark for each cylinder.
1. Remove the ignition coil.
2. Install a new sparkplug to the removed ignitioncoil.
3. Disconnect the injector intermediate connector.
Caution
Never touch the connector terminal as approx. 100 V is
applied to the injector, or you are seriously injured.
4. Earth the sparkplug electrodesecurely.
5. Check that the sparkplug igniteswhen theengine is
cranked.NGReplace the ignition coil.
OK
Measure fuel high-pressure between the fuel pump (high
pressure) and injector. (Refer to P.13A-222.)NGRepair
From the previouspage
Check the trouble symptoms.Replace the injector. NG
OK
MUT-
IIActuator Test
08 Purge control solenoid valve
(Refer to P.13A-203.)NGCheck the purge control solenoid valve system
(Refer to P.13A-197, Inspection procedure 36.)
Inspection procedure 14
The feeling of impact or vibration when accelerating
Probable cause
In cases such as the above, the cause is probably that there is an ignition leak
accompanying the increase in the sparkplug demand voltage during
acceleration.DMalfunction of the ignition system
Replace the ignition coil.
NG
OK
Check the trouble symptoms.
OK
Check the sparkplugNGReplace
NO
MUT-
IIData list
79 Throttle position sensor (1st channel) (Refer to P.13A-198.)NGCheck the throttle valve position feedback system
(Refer to P.13A-162, code No.92.)
MUT-
IISelf-Diag Code
Is a diagnosis code displayed?YESRefer to P.13A-130, INSPECTION CHART FOR DIAGNOSIS
CODES.


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