2000 MITSUBISHI MONTERO ESP

GDI -Troubleshooting 13A-42
Code No.P0203 No.3 injector systemProbable cause
Range of Check
DThe enginespeed is 4,000 r/min or less.
DThe battery voltage is 10 V or more.
DThe fuel cut operation or the injector operation (by carrying out the Actuator
Test) is not in progress.
Set Conditions
DThe injector driver is not transmitting a injectoropencircuit check signal for
four seconds.DMalfunction of No.3 injector
DOpen or short circuit in the No.3 injector circuit or
loose connector contact
DMalfunction of engine-ECU
NG
Check the following connector:
B-105NG
Repair
OK
NG
Repair
MUT-
IIActuator Test
03 No.3 injector
OK:
The idling condition should
change.OKCheck the trouble symptoms.OKTransient malfunction
(Refer to GROUP 00 - Points to
Note for Intermittent Malfunctions.)
NG
Replace the injector driver.
Check the trouble symptoms.NGReplace the engine-ECU.
OK
Measure at intermediate connector
B-105.
DDisconnect the connector and
measure at the harness side.
DResistance between terminals 9
and 10
OK:
0.9 - 1.1WNGCheck the following connector:
B-118NG
Repair
OK
Replace the No.3 injector.
OK
Check the following connector:
B-121NG
Repair
OK
Check the harness wire between the
injector driver and the intermediate
connector.NG
Repair
OK
Check the following connector:
D-116NG
Repair
OK
Check the harness wire between the
injector driver and the engine-ECU.NG
Repair
OK
Use an analyzer to measure the
signal waveform at engine-ECU
connectors D-116 and D-118.
DEngine: Idling
DVoltage between terminal 24 and
earth
OK:
A normal waveform should
be displayed as described
on P.13A-121 (INSPEC-
TION PROCEDURE US-
ING AN ANALYZER).NGCheck the following connector:
B-118
OK
Check the following connector:
B-118NG
Repair
OK
To the nextpageNG
OK
OK
Check the harness wire between the
No.3 injector and the intermediate
connector.NG
Replace the engine-ECU.
Repair
Repair
Check the harness wire between
No.3 injector and the intermediate
connector.


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GDI -Troubleshooting 13A-44
Code No.P0204 No.4 injector systemProbable cause
Range of Check
DThe enginespeed is 4,000 r/min or less.
DThe battery voltage is 10 V or more.
DThe fuel cut operation or the injector operation (by carrying out the Actuator
Test) is not in progress.
Set Conditions
DThe injector driver is not transmitting a injectoropencircuit check signal for
four seconds.DMalfunction of No.4 injector
DOpen or short circuit in the No.4 injector circuit or
loose connector contact
DMalfunction of engine-ECU
NG
Check the following connector:
B-105NG
Repair
OK
NG
Repair
MUT-
IIActuator Test
04 No.4 injector
OK:
The idling condition should
change.OKCheck the trouble symptoms.OKTransient malfunction
(Refer to GROUP 00 - Points to
Note for Intermittent Malfunctions.)
NG
Replace the injector driver.
Check the trouble symptoms.NGReplace the engine-ECU.
OK
Measure at intermediate connector
B-105.
DDisconnect the connector and
measure at the harness side.
DResistance between terminals 3
and 4
OK:
0.9 - 1.1WNGCheck the following connector:
B-115NG
Repair
OK
Replace the No.4 injector.
OK
Check the following connector:
B-121NG
Repair
OK
Check the harness wire between the
injector driver and the intermediate
connector.NG
Repair
OK
Check the following connector:
D-116NG
Repair
OK
Check the harness wire between the
injector driver and the engine-ECU.NG
Repair
OK
Use an analyzer to measure the
signal waveform at engine-ECU
connectors D-116 and D-118.
DEngine: Idling
DVoltage between terminal 2 and
earth
OK:
A normal waveform should
be displayed as described
on P.13A-121 (INSPEC-
TION PROCEDURE US-
ING AN ANALYZER).NGCheck the following connector:
B-115
OK
Check the following connector:
B-115NG
Repair
OK
To the nextpageNG
OK
OK
Check the harness wire between the
No.4 injector and the intermediate
connector.NG
Replace the engine-ECU.
Repair
Repair
Check the harness wire between
No.4 injector and the intermediate
connector.


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GDI -Troubleshooting 13A-46
Code No.P0205 No.5 injector systemProbable cause
Range of Check
DThe enginespeed is 4,000 r/min or less.
DThe battery voltage is 10 V or more.
DThe fuel cut operation or the injector operation (by carrying out the Actuator
Test) is not in progress.
Set Conditions
DThe injector driver is not transmitting a injectoropencircuit check signal for
four seconds.DMalfunction of No.5 injector
DOpen or short circuit in the No.5 injector circuit or
loose connector contact
DMalfunction of engine-ECU
NG
Check the following connector:
B-105NG
Repair
OK
NG
Repair
MUT-
IIActuator Test
05 No.5 injector
OK:
The idling condition should
change.OKCheck the trouble symptoms.OKTransient malfunction
(Refer to GROUP 00 - Points to
Note for Intermittent Malfunctions.)
NG
Replace the injector driver.
Check the trouble symptoms.NGReplace the engine-ECU.
OK
Measure at intermediate connector
B-105.
DDisconnect the connector and
measure at the harness side.
DResistance between terminals 7
and 8
OK:
0.9 - 1.1WNGCheck the following connector:
B-103NG
Repair
OK
Replace the No.5 injector.
OK
Check the following connector:
B-121NG
Repair
OK
Check the harness wire between the
injector driver and the intermediate
connector.NG
Repair
OK
Check the following connector:
D-116NG
Repair
OK
Check the harness wire between the
injector driver and the engine-ECU.NG
Repair
OK
Use an analyzer to measure the
signal waveform at engine-ECU
connectors D-116 and D-118.
DEngine: Idling
DVoltage between terminal 10 and
earth
OK:
A normal waveform should
be displayed as described
on P.13A-121 (INSPEC-
TION PROCEDURE US-
ING AN ANALYZER).NGCheck the following connector:
B-103
OK
Check the following connector:
B-103NG
Repair
OK
To the nextpageNG
OK
OK
Check the harness wire between the
No.5 injector and the intermediate
connector.NG
Replace the engine-ECU.
Repair
Repair
Check the harness wire between
No.5 injector and the intermediate
connector.


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GDI -Troubleshooting 13A-48
Code No.P0206 No.6 injector systemProbable cause
Range of Check
DThe enginespeed is 4,000 r/min or less.
DThe battery voltage is 10 V or more.
DThe fuel cut operation or the injector operation (by carrying out the Actuator
Test) is not in progress.
Set Conditions
DThe injector driver is not transmitting a injectoropencircuit check signal for
four seconds.DMalfunction of No.6 injector
DOpen or short circuit in the No.6 injector circuit or
loose connector contact
DMalfunction of engine-ECU
NG
Check the following connector:
B-105NG
Repair
OK
NG
Repair
MUT-
IIActuator Test
06 No.6 injector
OK:
The idling condition should
change.OKCheck the trouble symptoms.OKTransient malfunction
(Refer to GROUP 00 - Points to
Note for Intermittent Malfunctions.)
NG
Replace the injector driver.
Check the trouble symptoms.NGReplace the engine-ECU.
OK
Measure at intermediate connector
B-105.
DDisconnect the connector and
measure at the harness side.
DResistance between terminals 1
and 2
OK:
0.9 - 1.1WNGCheck the following connector:
B-104NG
Repair
OK
Replace the No.6 injector.
OK
Check the following connector:
B-121NG
Repair
OK
Check the harness wire between the
injector driver and the intermediate
connector.NG
Repair
OK
Check the following connector:
D-116NG
Repair
OK
Check the harness wire between the
injector driver and the engine-ECU.NG
Repair
OK
Use an analyzer to measure the
signal waveform at engine-ECU
connectors D-116 and D-118.
DEngine: Idling
DVoltage between terminal 25 and
earth
OK:
A normal waveform should
be displayed as described
on P.13A-121 (INSPEC-
TION PROCEDURE US-
ING AN ANALYZER).NGCheck the following connector:
B-104
OK
Check the following connector:
B-104NG
Repair
OK
To the nextpageNG
OK
OK
Check the harness wire between the
No.6 injector and the intermediate
connector.NG
Replace the engine-ECU.
Repair
Repair
Check the harness wire between
No.6 injector and the intermediate
connector.


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GDI -Troubleshooting 13A-54
OK
Check the harness wire between the
engine-ECU and the intermediate
connector.NG
Repair
OK
Check the following connector:
D-116NG
Repair
OK
Check the harness wire between the
ignition coil connector for a defective
cylinder and the intermediate
connector.NG
Repair
MUT-
IIActuator Test
01 No.1 injector
02 No.2 injector
03 No.3 injector
04 No.4 injector
05 No.5 injector
06 No.6 injector
OK:
The idling condition should
change.
Reference
When the cylinder (defective
cylinder) whereidling conditiondoes
not change is detected after
suspending the injector, go to (1)
and inspect the spark plug, the
ignition coil, the connector, and the
harness of the defective cylinder.
(When more than one cylinder are
detected, inspect all of them.)
When all the cylinders are OK, go to
(2).(1)Check the following connectors:
B-107 and the ignition coil
connectors, which correspond to
defective cylinders (B-101, B-108,
B-112, B-113, B-116, B-119).NG
Repair
OK
Check the sparkplug and the
ignition coil for a defective cylinder.
(Refer to GROUP 16 - Ignition
System.)NG
Replace
OK
Use an analyzer to measure the signal waveform at engine-ECU connector D-116.
DEngine: Idling
DThe voltage between the ignition coil primary signal terminal for a defective cylinder
and earth
OK:
A normal waveform should be displayed as described on P.13A-122 (Inspection
Procedure Using an Analyzer).
OK
Repair the ignition coil assembly for
a defective cylinder and the spark
plug.
NG
Replace the engine-ECU.
(2)
Use an analyzer to measure the
signal waveform at the ignition failure
sensor connector B-04.
DUse test harness (MB991536) to
connect the connector, and
measure at the pick-up harness.
DEngine: Idling
DThe voltage between terminal 2
and earth
OK:
A normal waveform should
be displayed as described
on P.13A-122 (INSPEC-
TION PROCEDURE US-
ING AN ANALYZER).
Reference
When a normal waveform is
displayed, compare it with that of the
ignition coil primary signal at the
engine-ECU terminal to determine
the cylinder (defective cylinder) with
an abnormal waveform.
®When one or more cylinders are
abnormal, go to (1)
®When all of the cylinders are
abnormal, go to (3)
®When a normal waveform is
displayed, go to (4).(3)
Check the following connectors:
B-04, D-117NG
Repair
OK
Check the harness wires between
the ignition failure sensor and the
engine-ECU, and between the
ignition failure sensor and earth.NG
Repair
OK
Repair the ignition failure sensor
Check the trouble symptoms.NGReplace the engine-ECU.
(4)Check the trouble symptoms.OKIntermittent malfunction
(Refer to GROUP 00 - Points to
Note for Intermittent Malfunctions.)
NG
Check the sparkplug and the
ignition coil for a defective
cylinder.(Refer to GROUP16 -
Ignition System.)
(1)


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GDI -Troubleshooting GDI -Troubleshooting 13A-55
Code No.P0301 No.1 cylinder misfire detected.
Code No.P0302 No.2 cylinder misfire detected.
Code No.P0303 No.3 cylinder misfire detected.
Code No.P0304 No.4 cylinder misfire detected.
Code No.P0305 No.5 cylinder misfire detected.Probable cause
Range of Check
DThe enginespeed is 500 - 4,500 r/min.
DWhile the engine is runningexcept deceleration and sudden acceleration.
Set Conditions
DThe number of misfires exceeds a predetermined number per 200engine
revolutions (Misfire has occurred in only one cylinder).
or
DThe number of misfires exceeds a predetermined number per 100engine
revolutions (Misfire has occurred in only one cylinder).DMalfunction of the ignition system
DAbnormal compression
DMalfunction of injector
DMalfunction of engine-ECU
NG
Check the harness wire between the
ignition coil and the engine-ECU.
NG
Replace
NG
Repair
(2) NG
OK
Check the ignition failure sensor
(Refer to GROUP 16 - Ignition
System.)
OK
Check the harness wire between the
ignition coil and the earth, and repair
if necessary. (3) NG
OK
Measure at ignition coil connectors
B-101, B-108, B-112, B-113, B-116,
B-119.
DDisconnect the connector and
measure at the harness side.
(1) The voltage between terminal 1
and earth
(Ignition switch: ON)
OK:
System voltage
(2) The voltage between terminal 3
and earth
(Engine: cranking)
OK:
0.5 - 4.0 V
(3) The resistance between terminal
2 and earth
OK:
2Wor less(1) NGCheck the following connectors:
B-04, B-107, D-208, D-223NG
Repair
Check the ignition coil (Refer to
GROUP 16 - Ignition System.)
Check the compression pressure.
(Refer to GROUP 11A - On-vehicle
Service.)Repair
Replace the engine-ECU.
OK
Check the harness wire between the
ignition coil and the ignition failure
sensor, and between the ignition coil
and the ignition failure sensor.
NG
Repair
OK
NGNG
Repair
OKReplace
NG
Check the spark plugs.
Check the trouble symptoms.
OK
Check the trouble symptoms.NGReplace the engine-ECU.
Check the following connectors:
B-101, B-108, B-112, B-113, B-116,
B-119
Check the following connector:
B-107, D-116
OK


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GDI -Troubleshooting 13A-61
Code No.P0420 Catalyst malfunctionProbable cause
Range of Check
DThe enginespeed is 3,000 r/min or less.
DDuring driving
DDuring air/fuel ratio feedback control
Set Conditions
DThe ratio between the oxygen sensor (rear) and the oxygen sensor (front)
output frequencies reaches 0.8 per 12 seconds on average.DMalfunction of catalyst
DMalfunction of the oxygen sensor (front)
DMalfunction of the oxygen sensor (rear)
DMalfunction of engine-ECU
Check the trouble symptoms.
Check the exhaust manifold. (Are there anycracks?)NG
OK
MUT-
IIData list
59 Oxygen sensor (rear)
DTransmission: 2nd
DDrive with wideopen throttle
OK:
600 - 1,000 mVNGCheck the oxygen sensor (rear) system
(Refer to P.13A-31, INSPECTIONPROCEDURE FOR
DIAGNOSTIC TROUBLE CODE P0136.)
OK
MUT-
IIData list
11 Oxygen sensor (front)
DTransmission: 2nd
OK:
Changeover between 0 - 400 mV and 600 - 1,000
mV occur 15 times in 10 seconds.
OK
Replace the oxygen sensor (rear).
NG
Replace the catalytic converter.
Check the trouble symptoms.
NG
Replace the engine-ECU.
MUT-
IIData list
11 Oxygen sensor (front)
OK:
600 - 1,000 mV when racing suddenly
OK
NGRepair
Check the oxygen sensor (front) system
(Refer to P.13A-28, INSPECTIONPROCEDURE FOR
DIAGNOSTIC TROUBLE CODE P0130.)
Replace the oxygen sensor (front). NG


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GDI -Troubleshooting 13A-81
Inspection procedure 7
Unstable idling (rough idle, hunting)
Probable cause
This malfunction is probably caused by a faulty ignition system, improper air/fuel ratio,
a faulty electronic-controlled throttle valve system, improper 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-control throttle valve
system
DImproper compression pressure
DAir sucking into the air intake system
Has the batterybeen disconnectedrecently?Ye sWarm up the engine, and then let it run at idle for approx. ten
minutes.
No
MUT-
IISelf-Diag code
Is a diagnosis code displayed?Ye sRefer to P.13A-15, INSPECTION CHART FOR DIAGNOSIS
CODES.
No
Does theengine idlespeed fluctuates excessively (excessivehunt-
ing)?Ye sClean around the throttle valve. (Refer to P.13A-220.)
No
MUT-
IIData list
79 Throttle position sensor (1st channel) (Refer to P.13A-105.)NGCheck the throttle valve position feedback system. (Refer to
P.13A-65, code No. P1221.)
OK
MUT-
IIData list
26 Acceleratorpedal positionswitch (Refer to P.13A-110.)NGCheck the acceleratorpedal positionswitch system. (Refer to
P.13A-100, Inspection procedure 28.)
OK
MUT-
IIData list
13 Intake air temperature sensor (Refer to P.13A-105.)NGCheck the intake air temperature sensor system. (Refer to P.13A-21,
code No. P0110.)
OK
MUT-
IIData list
25 Barometric pressure sensor (Refer to P.13A-105.)NGCheck the barometric pressure sensor system. (Refer to P.13A-19,
code No. P0105.)
OK
MUT-
IIData list
21 Engine coolant temperature sensor (Refer to P.13A-105.)NGCheck theengine coolant temperaturesensor. (Refer to P.13A-22,
code No. P0115.)
OK
MUT-
IIActuator test
08 Purge control solenoid valve (Refer to P.13A-110.)NGCheck the purge control solenoid valve system. (Refer to P.13A-62,
code No. P0443.)
OK
MUT-
IIData list
11 Oxygen sensor (front)
OK:
600 - 1,000 mV when theengine is suddenlyracedNGCheck the oxygen sensor (front) system. (Refer to P.13A-28, code
No. P0130.)
OK
MUT-
IIData list
59 Oxygen sensor (rear)
DTransmission: 2nd gear
DDriving with throttle widelyopen
OK:
600 - 1,000 mVNGCheck the oxygen sensor (rear) system. (Refer to P.13A-31, code
No. P0136.)
OK
To the nextpage


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