2000 MITSUBISHI MONTERO inspection procedure 13

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Page 2 of 1839

MITSUBISHI MONTERO 2000 Service Repair Manual 00-1
GENERAL
CONTENTS
HOW TO USE THIS MANUAL 2..............
Scope of Maintenance, Repair and Servicing
Explanations 2.................................
Definition of Terms 2...........................

Page 3 of 1839

MITSUBISHI MONTERO 2000 Service Repair Manual GENERAL -How to Use This Manual00-2
HOW TO USE THIS MANUAL
SCOPE OF MAINTENANCE, REPAIR
AND SERVICING EXPLANATIONS
This manual provides explanations, etc. concerning
procedures for the inspection, mai

GENERAL -How to Use This Manual00-2
HOW TO USE THIS MANUAL
SCOPE OF MAINTENANCE, REPAIR
AND SERVICING EXPLANATIONS
This manual provides explanations, etc. concerning
procedures for the inspection, maintenance, repair
and servicing of the subject model. Note, however,
that for engine and transmission-related component
parts, this manual covers only on-vehicle
inspections, adjustments, and the removal and
installation procedures for major components.
For detailed information concerning the inspection,
checking, adjustment, disassembly and reassembly
of the engine, transmission and major components
after they have been removed from the vehicle,
please refer to separate manuals covering the
engine and the transmission.
ON-VEHICLE SERVICE
“On-vehicle Service” is procedures for performing
inspections and adjustments of particularly
important locations with regard to the construction
and for maintenance and servicing, but other
inspection (for looseness, play, cracking, damage,
etc.) must also be performed.
INSPECTION
Under this title are presented inspection and
checking procedures to be performed by using
special tools and measuring instruments and by
feeling, but, for actual maintenance and servicing
procedures, visual inspections should always be
performed as well.
DEFINITION OF TERMS
STANDARD VALUE
Indicates the value used as the standard for judging
the quality of a part or assembly on inspection
or the value to which the part or assembly is
corrected and adjusted. It is given by tolerance.
LIMIT
Shows the standard for judging the quality of a
part or assembly on inspection and means the
maximum or minimum value within which the part
or assembly must be kept functionally or in strength.
It is a value established outside the range of
standard value.
REFERENCE VALUE
Indicates the adjustment value prior to starting the
work (presented in order to facilitate assembly and
adjustment procedures, and so they can be
completed in a shorter time).
CAUTION
Indicates the presentation of information particularly
vital to the worker during the performance of
maintenance and servicing procedures in order to
avoid the possibility of injury to the worker, or
damage to component parts, or a reduction of
component or vehicle function or performance, etc.
INDICATION OF TIGHTENING TORQUE
Tightening torques (units: N×m) are set to take into
account the central value and the allowable
tolerance. The central value is the target value,
and the allowable tolerance provides the checking
range for tightening torques. If bolts and nuts are
not provided with tightening torques, refer to
P.00-39.

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Page 7 of 1839

MITSUBISHI MONTERO 2000 Service Repair Manual GENERAL -How to Use Troubleshooting/Inspection Service Points00-6
HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE
POINTS
Troubleshooting of electronic control systems for which the MUT-IIcan be used fol

Page 11 of 1839

MITSUBISHI MONTERO 2000 Service Repair Manual GENERAL -How to Use Troubleshooting/Inspection Service Points00-10
HOW TO USE THE INSPECTION PROCEDURES
The causes of a high frequency of problems occurring in electronic circuitry are generally the c

GENERAL -How to Use Troubleshooting/Inspection Service Points00-10
HOW TO USE THE INSPECTION PROCEDURES
The causes of a high frequency of problems occurring in electronic circuitry are generally the connectors,
components, the ECU and the harnesses between connectors, in that order. These inspection procedures
follow this order, and they first try to discover a problem with a connector or a defective component.
D
Indicator does not turn on or off even if control
mode switch is pressed.
D
Indicator switch should not be illuminated is
illuminated.Probable cause
OK
OK
OK
Measure at switch connector A-44
DDisconnect the connector, and measure at the harness
side.
DVoltage between terminal 6 - earth and terminal 8 -
earth
OK:Approx. 5V
OK
NG
Check the following connector.A-44
Repair
OK
Check trouble symptom.
Replace the ECS-ECU.
In the above cases, the ECS switch circuit is defective or the indicator
circuit is defective.
CHECKING PROCEDURE 4
2. Indicates inspection carried out using the
MUT-
II.
Indicates the operation and inspection proce-
dures.
Indicates the OK judgement conditions.
3. Detailed inspection procedures (methods)
such as component inspection andcircuit
inspection are listed on a separate page, and
are given here for reference.
5. Inspect the contact condition at each connectorterminal.
(Refer to Connector Inspection Service Points.)
The connector position can be located in the wiring diagram in the
electrical wiring manual bymeans ofthis symbol.
Caution
After carrying out connector inspection, always be sure to
reconnect the connector as it was before.
6. Confirm that there are trouble symptoms. If trouble symptomshave
disappeared, the connector may have been inserted incorrectly and the
trouble symptom mayhave disappeared during inspection.
If it seemsthat trouble symptoms still remain, proceed to the nextpage of
instructions.
7. If trouble symptoms still remain up to this stage, there is a possibility that there is an
open orshort circuit in the harness between the connectors, socheck the harness.
Alternatively, the cause may be a defectiveECU, so try replacing the ECU andcheck
if the trouble symptom disappears.
NGECU switch component inspection (Refer to P.33-44.)
NG
1. Comments on the diagnosis code ortrouble
symptom above.
MUT-II
Data list
17 Control mode selectionswitch
OK:Voltage changes between approx. 0V
®approx.
2.5V
®approx. 5V when the switch is operated.
4. Indicates voltage and resistance to be measured at a particular
connector.
(Refer to Connector Measurement Service Points.)
The connector position can be located in the wiring diagram in the
electrical wiring manual bymeans ofthis symbol.
Indicates operation and inspection procedures, inspection terminals
and inspection conditions.
Indicates the OK judgement conditions.
HARNESS INSPECTION
Check for an open or short circuit in the harness between the terminals which were defective according
to the connector measurements. Carry out this inspection while referring to the electrical wiring manual.
Here, “Check harness between power supply and terminal xx” also includes checking for blown fuses.
For inspection service points when there is a blown fuse, refer to “Inspection Service Points for a Blown
Fuse.”
MEASURES TO TAKE AFTER REPLACING THE ECU
If the trouble symptoms have not disappeared even after replacing the ECU, repeat the inspection procedure
from the beginning.

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Page 36 of 1839

MITSUBISHI MONTERO 2000 Service Repair Manual GENERAL -Supplemental Restraint System (SRS)00-35
SRS-ECU
Terminal No.Destination of harnessCorrective action
1, 2, 3, 4Instrument panel wiring harness®Front wiring harness®Front
impact sensorRepair

Page 231 of 1839

MITSUBISHI MONTERO 2000 Service Repair Manual GDI -Troubleshooting <M/T>13A-17
INSPECTION PROCEDURE CLASSIFIED BY DIAGNOSIS CODE
Code No.P0100 Air flow sensor systemProbable cause
Range of Check
DEngine speed: 500 r/min or more
Set Conditions
DTh

GDI -Troubleshooting 13A-17
INSPECTION PROCEDURE CLASSIFIED BY DIAGNOSIS CODE
Code No.P0100 Air flow sensor systemProbable cause
Range of Check
DEngine speed: 500 r/min or more
Set Conditions
DThe sensor output frequency is 3.3 Hz or less for four seconds.DMalfunction of air flow sensor
DOpen or short circuit in air flow sensor circuit or
loose connector contact
DMalfunction of engine-ECU
(3) NGCheck the following connector:
D-118NG
Repair
(2) NGCheck the following connector:
B-25XNG
Repair
OK
Check the harness between the air
flow sensor and the engine-ECU,
and repair if necessary.
MUT-
IIData list
12 Air flow sensor (Refer to
P.13A-105, DATA LIST
REFERENCE TABLE.)OKTransient malfunction
(Refer to GROUP 00 - Points to
Note for Intermittent Malfunctions.)
NG
Check the following connector:
B-120NG
Repair
OK
Measure at air flow sensor connector
B-120.
DDisconnect the connector and
measure at the harness side.
(1) Voltage between terminal 3 and
earth (Ignition switch: ON)
OK:
4.8 - 5.2 V
(2) Voltage between terminal 4 and
earth (Ignition switch: ON)
OK:
System voltage
(3) Resistance between terminal 5
and earth
OK:
2Wor less(1) NGMeasure at engine-ECU connector
D-117.
DMeasure the voltage at the
engine-ECU terminal.
DIgnition switch: ON
DVoltage between terminal 61 and
earth
OK:
4.8 - 5.2 VOKCheck the following connector:
D-117
NG
Repair
OK
Replace the air flow sensor.
NG
Check the following connector:
D-117NG
Repair
OK
Check the harness between the air
flow sensor and the engine-ECU.NG
Repair
OK
Check the trouble symptoms.NGReplace the engine-ECU.
OK
Check the harness between the air
flow sensor and theengine control
relay, and repair if necessary.
OK
Check the harness between the air
flow sensor and the engine-ECU.NG
Repair
OK
Check the trouble symptoms.NGReplace the engine-ECU.
OK
Measure at air flow sensor connector
B-120.
DUse test harness (MB991709) to
connect the connector, and
measure at the pick-up harness.
DIgnition switch: ON
DVoltage between terminal 7 and
earth
OK:
7-8VNGCheck the following connector:
D-118NG
Repair
OK
Check the harness between the air
flow sensor and the engine-ECU.NG
Repair
OK
To the nextpage

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Page 248 of 1839

MITSUBISHI MONTERO 2000 Service Repair Manual GDI -Troubleshooting <M/T>13A-34
Code No.P0170 Abnormal fuel systemProbable cause
Range of Check
DEngine: Being learning the air - fuel ratio
Set Conditions
DTen seconds or more havebeenpassed while t

Page 264 of 1839

MITSUBISHI MONTERO 2000 Service Repair Manual GDI -Troubleshooting <M/T>13A-50
Code No.P0220 Accelerator pedal position sensor (1st
channel) systemProbable cause
Range of Check
DAcceleratorpedal positionsensor (2nd channel) is normal.
DCommunicat

GDI -Troubleshooting 13A-50
Code No.P0220 Accelerator pedal position sensor (1st
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
DThe output voltage of accelerator pedal positionsensor (1st channel) is 0.2 V
or less for one second.
or
DThe output voltage of accelerator pedal positionsensor (2nd channel) is 2.5
V or less, and that of acceleratorpedal positionsensor (1st channel) is 4.5
V or more for one second
or
DThe difference between accelerator pedal positionsensor (1st channel) and
accelerator pedal positionsensor (2nd channel) output voltages is 1.0 V or
more (i.e. the throttle opening anglechanges slightly).
or
DThe output voltage of accelerator pedal positionsensor (1st channel) is 1.1 V
or more for one second when the acceleratorpedal positionswitch is turned
on.DMalfunction of accelerator pedal positionsensor
(1st channel)
DOpen or short circuit in the acceleratorpedal
position sensor (1st channel) circuit or loose
connector contact
DAcceleratorpedal positionswitch seized ON
DMalfunction of throttle valve controller
DMalfunction of engine-ECU
OK
Check the harness wire between
accelerator pedal positionsensor
(1st channel) and the engine-ECU,
and repair if necessary.
NG
Check Acceleratorpedal position
sensor (1st channel) (Refer to
P.13A-229).NG
Replace
OK
Check the trouble symptoms.NGReplace the engine-ECU.(2) NGMeasure at engine-ECU connector
D-117.
DMeasure the voltage at the
engine-ECU terminal.
DIgnition switch: ON
DVoltage between terminal 42 and
earth
OK:
4.8 - 5.2 VOK
OK
MUT-
IIData list
78 Acceleratorpedal positionsensor
(1st channel) (Refer to 13A-105,
DATA LIST REFERENCE
TABLE.)OKTransient malfunction
(Refer to GROUP 00 - Points to
Note for Intermittent Malfunctions.)
OK
Check the trouble symptoms.NGReplace the engine-ECU.
MUT-
IIData list
26 Acceleratorpedal positionswitch
(Refer to 13A-105, DATA LIST
REFERENCE TABLE.)NGCheck the acceleratorpedal position
switch system. (Refer to P.13A-100,
Inspection Procedure 28).
OK
Measure at accelerator pedal position
sensor connector D-135.
DDisconnect the connector and
measure at the harness side.
(1) Resistance between terminal 1
and earth
OK:
2Wor less
(2) Voltage between terminal 2 and
earth
(Ignition switch: ON)
OK:
4.8 - 5.2 V(1) NGCheck the following connector:
D-117NGRepair
NG
Repair
NG
Check the following connector:
D-117NG
Repair
OK
Check the following connector:
D-135NG
Repair
OK
Check the harness wire between
accelerator pedal positionsensor
(1st channel) and the engine-ECU.NG
Repair
OK
Check the harness wire between
accelerator pedal positionsensor
(1st channel) and the engine-ECU.NG
RepairOK
To the nextpage
Check the following connector:
D-117
OK

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