check engine MITSUBISHI MONTERO 2000 Service Workshop Manual

GDI -Troubleshooting 13A-62
Code No.P0443 Purge control solenoid valve systemProbable cause
Range of Check
DIgnition switch: ON
DBattery voltage is 10 V or more.
Set Conditions
DThe solenoid coil surge voltage (battery voltage + 2 V) is not detected when
the purge control solenoid valve is turned from on to off.DMalfunction of the purge control solenoid valve
DOpen or short circuit in the purge control solenoid
valve circuit or loose connector contact
DMalfunction of engine-ECU
Repair
MUT-
IIActuator Test
08 Purge control solenoid valve
OK:
Operating sound can be
heard and the valve vibrates.OKIntermittent malfunction
(Refer to GROUP 00 - Points to
Note for Intermittent Malfunctions.)
NG
Check the harness wire between the
purge control solenoid valve and the
engine controlrelay, and repair if
necessary.
NG
Measure at the purge control
solenoid valve connector B-106.
DDisconnect the connector, and
measure at the solenoid valve
side.
DThe resistance between terminals
1 and 2
OK:
28 - 36W(at 20_C)NG
Replace
OK
Measure at the purge control
solenoid valve connector B-106.
DDisconnect the connector and
measure at the harness side.
DIgnition switch: ON
DThe voltage between terminal 2
and earth
OK:
System voltageNGCheck the following connector:
B-25XNG
Repair
OK
Check the following connector:
B-106NG
Repair
OK
OK
Measure at engine-ECU connector
D-116.
DMeasure the voltage at the
engine-ECU terminal.
DIgnition switch: ON
DThe voltage between terminal 16
and earth
OK:
System voltageNGCheck the following connector:
D-119NG
Repair
OK
Check the following connector:
D-116NG
Repair
OK
NG
Repair
OK
Check the trouble symptoms.
NG
Replace the engine-ECU.OKNG
Replace the engine-ECU.
Check the harness wires between
the purge control solenoid valve and
the engine controlrelay, and
between the purge control solenoid
valve and the engine-ECU.
Check the harness wire between the
purge control solenoid valve and the
engine-ECU.


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GDI -Troubleshooting 13A-63
Code No.P0500 Vehicle speed sensor systemProbable cause
Range of Check
DEngine: Two seconds after theengine wasstarted
DIdle switch: OFF
DEngine speed: 2,500 r/min or more
DDuring high engine load
Set Conditions
DThe sensor output voltage does not change for 4 seconds (no pulse signal
input).DMalfunction of the vehicle speed sensor
DOpen or short circuit in the vehicle speed sensor
circuit or loose connector contact
DMalfunction of engine-ECU
NOCheck the vehicle speed sensor
(Refer to GROUP 54 - Combination Meter.)
YES
Use an analyzer to measure the output waveform of the
vehicle speed sensor at engine-ECU connector D-118.
DDriving the vehicle
DThe voltage between terminal 80 and earth
OK:
A normal waveform should be displayed as described
in OSCILLOSCOPE INSPECTION PROCEDURE,
and noise should not be displayed in the waveform.
(Refer to GROUP 23 - Troubleshooting)NGCheck the following connectors:
D-118, E-13
NG
Repair
OK
Check the harness wire between intermediate connector E-13
and the engine-ECU, and repair if necessary.
OK
Check the following connector:
C-09NG
Repair
OK
Check the trouble symptoms.
NG
Replace the engine-ECU.
Does the speedometer operate normally?
Code No.P1200 Injector driver systemProbable cause
Range of Check
DEngine speed: 4,000 r/m or less
DBattery voltage: 10 V or more
DThe fuel cut operation and the injector operation (by carrying out the Actuator
test) are not in progress.
DDuring high engine load
Set Conditions
DInjector opencircuit check signal is not output from the injector driver.DMalfunction of the injector driver
DOpen or short circuit, or loose connector contact
DMalfunction of engine-ECU
OK
Use an analyzer to measure the signal waveform at
engine-ECU connectors D-116, D-118.
DEngine: Idling
DThe voltage between terminal 96 and earth, terminal 1 and
earth
OK:
A normal waveform should be displayed as described
on P.13A-121 (INSPECTIONPROCEDURE USING
AN ANALYZER).NGReplace the injector driver.
OK
Check the harness wire between the injector driver and the
engine-ECU.NG
Repair
NG
Replace the engine-ECU.
Check the following connectors:
B-121, D-118NG
Repair
OK
Check the trouble symptoms.OKIntermittent malfunction
(Refer to GROUP 00 - Points to Note for Intermittent
Malfunctions.)


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GDI -Troubleshooting 13A-64
Code No.P1220 Electronic-controlled throttle valve
systemProbable cause
Range of Check
DIgnition switch: ON
DError in communication between the engine-ECU and the throttle valve
controller
Set Conditions
DOutput voltage of throttle position sensor (2nd channel) fluctuates significantly
(approx. 1 V or more) from an expected value, based on that of the
accelerator pedal positionsensor (2nd channel).
Range of Check
DIgnition switch: ON
DError in communication between the throttle valve controller and the
engine-ECU
Set Conditions
DThe output voltage of the throttle position sensor (2nd channel) is significantly
different (approx. 1 V) from the the throttle valveopening angle (voltage),
which the engine-ECU request the throttle valve controller.DShort in communicationline
DMalfunction of the engine-ECU
DMalfunction of the throttle valve controller
OK
Check the harness wire between the throttle valve controller
and the engine-ECU.NG
Repair
NG
Replace the engine-ECU.
Check the following connectors:
D-11, D-118NG
Repair
OK
NG
Replace the throttle valve controller.
Check the trouble symptoms.
Check the trouble symptoms.


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GDI -Troubleshooting 13A-65
Code No.P1221 Throttle valve position feedback systemProbable cause
The throttle valve controller judges a malfunction, and then transmit the result to
the engine-ECU.
Range of Check
DIgnition switch: ON
DBattery voltage: 10 V or more
Set Conditions
DFailure in the position feedback
(The engine-ECU detects that the current in the motor isexcessive and the
opening angle difference between the targetvalue of throttle position sensor
(1st channel) and the actual value of throttle position sensor (1st channel) is
2.0 V or more)DMalfunction of throttle position sensor (1st channel)
DOpen or short circuit in the throttle position sensor
(1st channel) circuit or loose connector contact
DMalfunction of the throttle valve controller
NG
Replace the throttle valve controller.
OK
Check the trouble symptoms.
NG
Check the harness wires between the throttle position sensor
and the throttle valve controller, and between the throttle valve
control servo and the throttle valve controller.NG
Repair
NO
Adjust the throttle position sensor. (Refer to P.13A-220.)
MUT-
IISelf-Diag Code
Is code No.P0120 set?YESRefer to Code No.P0120, Throttle position sensor (1st
channel) system (Refer to P.13A-25).
NO
MUT-
IISelf-Diag Code
Is Code No.P1222 set?YESRefer to Code No.P1222, Throttle valvr control servo system
(Refer to P.13A-66.)
OK
Check the following connectors:
B-102, B-122, D-11NG
Repair
OK
Check the throttle valve control servo. (Refer to 13A-132.)NGReplace the throttle body assembly.


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GDI -Troubleshooting 13A-66
Code No.P1222 throttle valve control servo systemProbable cause
The throttle valve controller judges a malfunction, and then transmit the result to
the engine-ECU.
Range of Check
Dthrottle valve control servo relay: ON
Set Conditions
DShort circuit of the throttle valve control servo drive circuit to earth
DPower is supplied to the throttle valve control servo circuit from other
sources.
DOpen circuit in the throttle valve control servo power supply circuitDMalfunction of the throttle valve control servo
DOpen circuit in the throttle valve control servo
power supply circuit
DOpen or short circuit in the throttle valve control
servo circuit or loose connector contact
DMalfunction of throttle valve controller
OKTransient malfunction
(Refer to GROUP 00 - Points to
Note for Intermittent Malfunctions.)
OK
Check the following connector:
B-122NG
Repair
OK
Measure at the throttle valve control
servo connector B-122
DUse test harness (MB991658) to
connect the connector, and
measure at the pick-up harness.
DIgnition switch: ON
DThe voltage between terminal 1
and earth
DThe voltage between terminal 2
and earth
DThe Voltage between terminal 3
and earth
OK:
Voltage changes between 5
- 7 V when the accelerator
pedal is operated.
NOTE: Erase the diagnosis code
before the measurement
since a diagnosis code is
recorded when the harness
is disconnected.NGCheck the following connector:
D-11NG
Repair
OK
Check the trouble symptoms.
OK
Check the trouble symptoms.
OK
Check the harness wire between the
throttle valve control servo and the
throttle valve controller.NG
Repair
NG
Check the throttle valve control
servo (Refer to P.13A-232.)NGReplace the throttle body assembly
NG
Replace the throttle valve controller.
NG
Replace the throttle valve controller.
Check the trouble symptoms.
NG
Replace the engine-ECU.
Check the operation of the throttle
valve control servo.
OK:
The throttle valve opens or
closes when the accelerator
pedal is depressed or released.


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GDI -Troubleshooting 13A-67
Code No.P1223 Communication line system with the
throttle valve controllerProbable cause
Range of Check
DIgnition switch: ON
DBattery voltage: 8 V or more.
DEngine: not cranking
Set Conditions
DSystem detects an error in communicationline between the engine-ECU and
the throttle valve controller, and between the throttle valve controller and the
engine-ECU.DShort in communicationline
DMalfunction of engine-ECU
DMalfunction of throttle valve controller
MUT-
IISelf-Diag Code
Is Code No.P1220 output?YESRefer to Code No.P1220,
Electronic-controlled throttle valve system
(Refer to P13A-64.)
NO
NG
Repair
OK
Measure at throttle valve controller
connector D-11.
DMeasure voltage at the throttle
valve controller connector
terminals.
DIgnition switch: ON
(1) The voltage between terminal 5
and earth
OK:
System voltage
(2) The voltage between terminal 22
and earth
OK:
System voltage
(3) The voltage between terminal 3
and earth
The voltage between terminal 4
and earth
The voltage between terminal 16
and earth
OK:
0.5 V or less(1) NGCheck the following connectors:
B-25X,
D-128NG
Repair
Check the trouble symptoms.OK
Check the harness wire between the
throttle valve controller and theengine
control relay, and repair if necessary.
OK
Check the trouble symptoms.
NG
Replace the engine-ECU.
(2) NGCheck the following connectors:
D-208,
D-223, E-13NG
Repair
OK
Check the harness wire between the
throttle valve controller and the ignition
switch, and repair if necessary.
(3) NGCheck the following connector:
D-14NG
Repair
OK
Check the harness wire between the
throttle valve controller and earth, and
repair if necessary.
OK
Check the following connector:
D-118NG
Repair
OK
Check the harness wire between the
throttle valve controller and the
engine-ECU.NG
Repair
NG
Replace the throttle valve controller.
Check the following connector:
D-11


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GDI -Troubleshooting 13A-68
Code No.P1225 Accelerator pedal position sensor (2nd
channel) systemProbable cause
Range of Check
DAcceleratorpedal positionsensor (2nd channel) is normal.
DCommunication between the engine-ECU and the throttle valve controller is
normal.
Set Conditions
DOutput voltage of the accelerator pedal positionsensor (2nd channel) is 0.2
V or less for one second
or
DOutput voltage of the accelerator pedal positionsensor (1st channel) is 2.5 V
or less, and output voltage of the acceleratorpedal positionsensor (2nd
channel) is 4.5 V or more for one second.
or
DDifference between the accelerator pedal positionsensor (1st and 2nd
channels) output voltages exceeds 1.0 V (i.e. when the throttle valveopening
anglechanges slightly).DMalfunction of accelerator pedal positionsensor
(2nd channel)
DOpen or short circuit in acceleratorpedal position
sensor (2nd channel) circuit or loose connector
contact
DMalfunction of the throttle valve controller
DMalfunction of engine-ECU
OKIntermittent malfunction
(Refer to GROUP 00 - Points to
Note for Intermittent Malfunctions.)
NG
Check the acceleratorpedal position
sensor (Refer to P.13A-229.)NG
Replace
OK
Measure at accelerator pedal position
sensor connector D-135
DDisconnect the connector and
measure at the harness side.
(1) The resistance between terminal
7 and earth
OK:
2Wor less
(2) The voltage between terminal 8
and earth
(Ignition switch: ON)
OK:
4.8 - 5.2 V(1) NGCheck the following connector:
D-11NG
Repair
OK
Check the following connector:
D-135NG
Repair
Check the harness wire between
accelerator pedal positionsensor
(2nd channel) and the throttle valve
controller.NG
Repair
OK
Check the trouble symptoms.NGReplace the throttle valve controller.
(2) NGMeasure at throttle valve controller
connector D-11.
DMeasure voltage at the throttle
valve controller connector
terminals.
DIgnition switch: ON
DThe voltage between terminal 6
and earth
OK:
4.8 - 5.2 VOK
OK
Check the harness wire between
accelerator pedal positionsensor
(2nd channel) and the throttle valve
controller, and repair if necessary.NG
Repair
NG
Check the following connector:
D-11NG
Repair
OK
Check the harness wire between
accelerator pedal positionsensor
(2nd channel) and the throttle valve
controller.NG
Repair
OK
To the nextpage
OK
Check the trouble symptoms.NGReplace the throttle valve controller. OK
MUT-
IIData list
77 Acceleratorpedal positionsensor
(2nd channel) (Refer to P.
13A-105, DATA LIST
REFERENCE TABLE.)
Check the following connector:
D-11


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GDI -Troubleshooting 13A-70
Code No.P1500 Alternator FR terminal systemProbable cause
Range of Check
DEngine speed: 50 r/min or more
Set Conditions
DInput voltage from the alternator FR terminal is system voltage for 20
seconds.DOpen circuit in alternator FR terminal circuit
DMalfunction of engine-ECU
OK
Check the harness wire between the
intermediate connector and the
engine-ECU, and repair if necessary.NG
Repair
NG
Check the following connector:
D-117NG
Repair
Check the following connector:
B-41NG
Repair
OK
Measure at intermediate connector
B-41.
DUse test harness (MB991658) to
connect the connector, and
measure at the pick-up harness.
DEngine:idling (After warming up)
DRadiator fan: Not operating
DThe voltage between terminal 2
and earth
OK:
The voltage drops when
the headlamps are turned
on.NG
Check the following connector:
B-59NG
Repair
OK
Check the trouble symptoms.
NG
Replace the engine-ECU.
OK
Check the harness wire between the
intermediate connector and the
engine-ECU.NG
Repair
OK
Measure at intermediate connector
B-41.
DUse test harness (MB991658) to
connect the connector, and
measure at the pick-up harness.
DIgnition switch: ON
DThe voltage between terminal 2
and earth
OK:
9 - 10 VNGMeasure at engine-ECU connector
D-117.
DMeasure the voltage at the
engine-ECU terminal.
DIgnition switch: ON
DThe voltage between terminal 52
and earth
OK:
9 - 10 VNGCheck the following connector:
D-117
OK
NG
Repair
OK
Check the following connector:
D-117NG
Replace
OK
Check the trouble symptoms.NGReplace the engine-ECU.
OK
Check the harness wire between the
intermediate connector and the
engine-ECU.NG
Repair
NG
Replace the alternator.OK
Check the trouble symptoms.OKIntermittent malfunction
(Refer to GROUP 00 - Points to
Note for Intermittent Malfunctions.)
Check the harness wire between the
alternator and the intermediate
connector.


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GDI -Troubleshooting 13A-71
Cord No.P1610 Immobilizer systemProbable cause
Range of Check
DIgnition switch: ON
Set Conditions
DImproper communication between the engine-ECU and the immobilizer-ECUDOpen or short circuit, or loose connector contact
DMalfunction of the immobilizer-ECU
DMalfunction of the engine-ECU
NOTE
(1) If the registered ignition keys are close each other when starting the engine, radio interference may
cause this code to be displayed.
(2) This code may be displayed when registering the key encrypted code.
NG
Replace the engine-ECU.
Check the trouble symptoms.
NG
Replace the immobilizer-ECU
OK
Check the trouble symptoms.
OK
Check the harness wire between the
immobilizer-ECU and the
engine-ECU.NG
Replace
Check the following connectors:
D-118, D-202, E-13NG
Repair


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GDI -Troubleshooting 13A-74
ItemsSymptom
DrivingShockThe feeling of a comparatively large impact or vibration when the engine is
accelerated or decelerated.
SurgeThis is repeated surging ahead during constant speed travel or during variable
speed travel.
KnockingA sharp sound like a hammer striking the cylinder walls during driving and which
adversely affects driving.
StoppingRun on
(“Dieseling”)The condition in which the engine continues to run after the ignition switch is
turned to OFF. Also called “Dieseling”.
INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS
INSPECTION PROCEDURE 1
Communication with MUT-II
is not possible.
(Communication with all systems is not possible.)
Probable cause
The cause is probably a defect in the power supply system (including earth) for the
diagnosis line.DMalfunction of the connector
DMalfunction of the harness wire
DMalfunction of MUT-
II
Measure at the diagnostic connector
(16-pin) D-23.
DVoltage between 16 and earth
OK:System voltageNGCheck the following connectors:
D-27, D-210, D-211NG
Repair
OK
Check trouble symptom.NGCheck the harness wire between the
power supply and diagnostic connector
(16 pin), and repair if necessary.OK
Measure at the diagnostic connector
(16-pin) D-23.
DContinuity between 4 and earth
DContinuity between 5 and earth
OK:ContinuityNGCheck the harness wire between the
diagnostic connector (16-pin) and earth,
and repair if necessary.
OK
Replace the MUT-
II.


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