ignition MITSUBISHI MONTERO 2000 Service Repair Manual

ENGINE ELECTRICAL -Charging System16-10
14. If the voltage reading conforms to the value
in the voltage regulation, then the voltage
regulator is operating normally.
If the voltage is not within the standard value,
there is a malfunction of the voltage regulator
or of the alternator.
15. After the test, lower the engine speed to the
idle speed.
16. Turn the ignition switch off.17. Remove the tachometer or the MUT-II.
18. Disconnect the negative battery cable.
19. Disconnect the ammeter and voltmeter.
20. Connect the alternator output wire to the
alternator “B” terminal.
21. Remove the special tool, and return the
connector to the original condition.
22. Connect the negative battery cable.
Voltage Regulation Table
Standard value:
Inspection terminalVoltage regulator ambient temperature_
CVoltage V
Terminal “S”-2014.2 - 15.4
2013.9 - 14.9
6013.4 - 14.6
8013.1 - 14.5


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ENGINE ELECTRICAL -Ignition System16-39
Voltage: 1.5VTerminal No.
123
When current is
flowing
When current is
not flowing
SECONDARY COIL CHECK
NOTE
It is impossible to check the secondary coil through the
continuity check as a diode is integrated in the secondary
coil circuit of this ignition coil. So, check the secondary coil
in the following procedure.
1. Disconnect the ignition coil connector.
2. Remove the ignition coil and install a new spark plug
to the ignition coil.
3. Connect the ignition coil connector.
4. Earth the side electrode of the spark plug and crank
the engine.
5. Check that spark is produced between the electrodes of
the spark plug.
6. If no spark is produced, replace the ignition coil with a
new one and recheck.
7. If spark is produced with the new ignition coil, replace
the old one as it is faulty. If no spark is produced again,
the ignition circuit is suspected as faulty. Check the ignition
circuit.
SPARK PLUG CHECK AND CLEANING
Caution
1. The spark plug gap for iridium plugs should not be
adjusted.
2. Cleaning iridium plugs may result in damage to the
iridium tip. Therefore, if cleaning is necessary
because the plug is sooty, use a plug cleaner, and
do not clean the plug for more than 20 seconds in
order to preserve the electrodes. A wire brush should
never be used.
3. The spark plugs in GDI engines are special iridium
plugs in which the electrodes can become black even
when the plugs are working normally. Carbon which
may become deposited on these plugs burns off more
readily than with conventional plugs, and so should
not cause any problems with spark plug performance.
Judgement of whether a spark plug is operating
normally or not should be made by checking the
insulation resistance.


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ENGINE AND EMISSION CONTROL -Auto-cruise Control System17-18
Inspection Procedure 7
Hunting (repeated acceleration and deceleration) occurs
at the set vehicle speed.
Probable cause
The cause is probably a malfunction of vehicle speed sensor or throttle control servo.
In either case, a diagnosis code regarding the GDI system must be confirmed.DMalfunction of the vehicle speed sensor
DMalfunction of the throttle control servo
DMalfunction of the throttle valve controller
DMalfunction of the engine-ECU
DMalfunction of the engine-A/T-ECU
MUT-II Self-Diag code
Is a diagnosis code regarding the GDI system output?YES
NO
Replace the throttle valve controller.
Check trouble symptoms.NGReplace the engine-ECU or engine-A/T-ECU
Follow the troubleshooting regarding the GDI system. (Refer to
GROUP 13A.)
Inspection Procedure 8
When the MAIN switch of the auto-cruise control switch is
turned on, the auto-cruise control indicator lamp does not
illuminate. (However, the auto-cruise control in normal.)
Probable cause
There may be a burnt-out bulb or a malfunction of the auto-cruise control indicator
lampcircuit.DBurnt-out bulb
DMalfunction of the harness
DMalfunction of the connector
DMalfunction of the engine-ECU
DMalfunction of the engine-A/T-ECU
OK
Auto-cruise control indicatorlamp bulbcheckNG
Replace
NG
Repair
OK
NG
OK
Check trouble symptom.
NG
Check the harness between the J/B and the combination meter,
and repair if necessary.
Check the following connectors:
D-02, E-10, D-116
D-02, E-10, D-119
OK
Check trouble symptom.
NG
Repair
NG
Replace the engine-ECU or engine-A/T-ECU NG
Measure at the engine-ECU connector D-116 or engine-
A/T-ECU connector D-119 .
DDisconnect the connector and measure at the harness side.
DIgnition switch and auto-cruise control MAIN switch: ON
DVoltage between terminal 28 and earth or
voltage between terminal 15 and earth
OK:System voltage
Measure at the combination meter connector D-01.
DDisconnect the connector and measure at the harness side.
DIgnition switch and MAIN switch: ON
DVoltage between terminal 62 and earth
OK:System voltageCheck the following connector:D-01
NG
Check the harness between the combination meter and the engine-
ECU or engine-A/T-ECU , and repair if necessary. OK
Check trouble symptom.


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ENGINE AND EMISSION CONTROL -Auto-cruise Control System17-19
Inspection Procedure 9
Auto-cruise control switch input system check
NG
Check the harness between the auto-cruise control switch and
the throttle valve controller, and repair if necessary.
OK
NG
Repair
OK
Check trouble symptom. NG
OK
Auto-cruise control switch check (Refer to P.17-29.)NG
Replace
NG OKClock spring check (Refer to GROUP 52B.)
Repair
OK
NG
Repair
NG
OK
Check trouble symptom.
NG
Check the harness between the J/B and the auto-cruise control
switch, and repair if necessary.
Check the following connectors:
D-210, D-31, D-205, D-205-2, D-205-3
OK
Check trouble symptom.
NG
Repair
NG
Replace the throttle valve controller.NG
Measure at the throttle valve controller connector D-11.
DDisconnect the connector and measure at the harness side.
DIgnition switch and auto-cruise control MAIN switch: ON
DVoltage between terminal 12 and earth
OK:System voltage
Measure at the auto-cruise control switch connector D-205-3.
DDisconnect the connector and measure at the harness side.
DIgnition switch: ON
DVoltage between terminal 1 and earth
OK:System voltage
NG
Check the harness between the auto-cruise control switch and
the throttle valve controller, and repair if necessary.
OK
Check trouble symptom.
Check the following connectors:
D-205-3, D-205-2, D-205, E-10, D-11
Measure at the throttle valve controller connector D-11.
DDisconnect the connector and measure at the harness side.
DIgnition switch and auto-cruise control MAIN and CANCEL
switch: ON
DVoltage between terminal 10 and earth
OK:System voltageCheck the following connectors:
D-205-3, D-205-2, D-205, E-10, D-11


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ENGINE AND EMISSION CONTROL -Auto-cruise Control System17-23
Inspection Procedure 7
Hunting (repeated acceleration and deceleration) occurs
at the set vehicle speed.
Probable cause
The cause is probably a malfunction of vehicle speed sensor or GE actuator (electronic
governor).
In either case, a diagnosis code regarding the diesel fuel system must be confirmed.DMalfunction of the vehicle speed sensor
DMalfunction of the GE actuator (electronic governor)
DMalfunction of the engine-ECU
MUT-II Self-Diag code
Is a diagnosis code regarding the diesel fuel system output?YES
NO
Check trouble symptoms.NGReplace the engine-ECU.
Follow the troubleshooting regarding the diesel fuel system. (Refer
to GROUP 13C.)
Inspection Procedure 8
When the MAIN switch of the auto-cruise control switch is
turned on, the auto-cruise control indicator lamp does not
illuminate. (However, the auto-cruise control in normal.)
Probable cause
There may be a burnt-out bulb or a malfunction of the auto-cruise control indicator
lampcircuit.DBurnt-out bulb
DMalfunction of the harness
DMalfunction of the connector
DMalfunction of the engine-ECU
OK
Auto-cruise control indicatorlamp bulbcheckNG
Replace
NG
Repair
OK
NG
OK
Check trouble symptom.
NG
Check the harness between the J/B and the combination meter,
and repair if necessary.
Check the following connectors:
D-02, E-10, D-110
OK
Check trouble symptom.
NG
Repair
NG
Replace the engine-ECU.NG
Measure at the engine-ECU connector D-110.
DDisconnect the connector and measure at the harness side.
DIgnition switch and auto-cruise control MAIN switch: ON
DVoltage between terminal 22 and earth
OK:System voltage
Measure at the combination meter connector D-01.
DDisconnect the connector and measure at the harness side.
DIgnition switch and MAIN switch: ON
DVoltage between terminal 62 and earth
OK:System voltageCheck the following connector:D-01
NG
Check the harness between the combination meter and the engine-
ECU, and repair if necessary. OK
Check trouble symptom.


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ENGINE AND EMISSION CONTROL -Auto-cruise Control System17-24
Inspection Procedure 9
Auto-cruise control switch input system check
NG
Check the harness between the auto-cruise control switch and
the engine-ECU, and repair if necessary.
OK
NG
Repair
OK
Check trouble symptom. NG
OK
Auto-cruise control switch check (Refer to P.17-29.)NG
Replace
NG OKClock spring check (Refer to GROUP 52B.)
Repair
OK
NG
Repair
NG
OK
Check trouble symptom.
NG
Check the harness between the J/B and the auto-cruise control
switch, and repair if necessary.
Check the following connectors:
D-210, D-31, D-205, D-205-2, D-205-3
OK
Check trouble symptom.
NG
Repair
NG
Replace the engine-ECU.NG
Measure at the engine-ECU connector D-111.
DDisconnect the connector and measure at the harness side.
DIgnition switch and auto-cruise control MAIN switch: ON
DVoltage between terminal 45 and earth
OK:System voltage
Measure at the auto-cruise control switch connector D-205-3.
DDisconnect the connector and measure at the harness side.
DIgnition switch: ON
DVoltage between terminal 1 and earth
OK:System voltage
NG
Check the harness between the auto-cruise control switch and
the engine-ECU, and repair if necessary.
OK
Check trouble symptom.
Check the following connectors:
D-205-3, D-205-2, D-205, E-10, D-111
Measure at the engine-ECU connector D-112.
DDisconnect the connector and measure at the harness side.
DIgnition switch and auto-cruise control MAIN and CANCEL
switch: ON
DVoltage between terminal 61 and earth
OK:System voltageCheck the following connectors:
D-205-3, D-205-2, D-205, E-10, D-112


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ENGINE AND EMISSION CONTROL -Auto-cruise Control System17-25
DATA LIST REFERENCE TABLE
For the data, which is input to the engine-ECU
<6G7-M/T, 4M4>, engine-A/T-ECU <6G7-A/T> andthrottle valve controller <6G7>, the following items
can be read out by using the MUT-II
.
HOW TO READ OUT DATA LIST
1. Connect the MUT-II
to the 16-pin diagnosis
connector.
Caution
Turn off the ignition switch befor connecting
and disconnecting the MUT-II
.2. Turn the ignition switch to “ON” position.
3. Select “auto-cruise control” on the MUT-II
menu, and then read out the data list.
<6G7>
Terminal
No.Check itemCheck conditionsNormal condition
01Auto-cruiseMAINMAIN switch: ONON
control
switchMAIN switch: OFFOFF
02SETMAIN switch:SET switch: ONON
(COAST)ONSET switch: OFFOFF
03RESUMERESUME switch: ONON
(ACCEL)RESUME switch: OFFOFF
04CANCELCANCEL switch: ONON
CANCEL switch: OFFOFF
05Stop lamp switchBrake pedal: DepressedON
(for stop lamp circuit)Brake pedal: ReleasedOFF
06Stop lamp switchBrake pedal: DepressedOFF
(for auto-cruise control
circuit)
Brake pedal: ReleasedON
07Clutch switchClutch pedal: DepressedON
Brake pedal: ReleasedOFF
Inhibitor switchSelector lever: “N“, “P” positionON
Selector lever: Other than “N“, “P” positionOFF
08Accelerator switchAccelerator pedal: ReleasedON
(Idle position switch)Accelerator pedal: DepressedOFF
09Auto-cruise controlAuto-cruise control system: ActivatedON
systemAuto-cruise control system: Not activatedOFF
10Vehicle speed sensorRoad test the vehicleThe speedometer and
the MUT-IIdisplay the
same value.


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MANUAL TRANSMISSION -Troubleshooting 22-3
TROUBLESHOOTING
For items other than the following service procedures, refer to GROUP 23 - Troubleshooting .
INSPECTION CHART FOR DIAGNOSIS CODES
Diagnosis
codeDiagnosis itemReference page
21Lever position sensor (LPS) system <4D5>Open circuit/Malfunc-
tion of sensor22-3
INSPECTION PROCEDURE FOR DIAGNOSIS CODES
Code No.21 Lever position sensor (LPS) system <4D5>Probable cause
If the LPS output voltage becomes 0.2 V or less at idling, code No.21 will be
set as opencircuit or maladjustment of the LPS.DMalfunction of the LPS
DMalfunction of harness or connector
DMalfunction of transfer-ECU
DMalfunction of the glow-ECU
NGOK
NG
Repair
MUT-II Data list
DNo.1 LPS
OK:Refer to P.23-5, DATA LIST
REFERENCE TABLE.
NG
ReplaceCheck the LPS.
(Refer to GROUP 17 - Emission
Control System)
OK
NG
Repair
OK
Check the following connector:
B-02
OK
OK
Check the following connector:D-114
Repair
NG
Repair
NG
Repair
OK
OK
Check the following connector:D-114
Measure at glow-ECU connector
D-114.
DECU terminal voltage
measurement
DIgnition switch: ON
DVoltage between terminal 7 and
earth
OK:4.8 - 5.2 V
NGNG
NGCheck the trouble symptoms.
OK
Measure at LPS connector B-02.
DDisconnect the connector and
measure at the harness side.
DVoltage between 2 and earth
(Ignition switch: ON)
OK:4.8 - 5.2 V
To the nextpage
Intermittent malfunction
(Refer to GROUP 00 - Points to
Note for Transient Malfunctions.)
OK
Check the harness wire between the
LPS and the glow-ECU, and repair if
necessary.
Check the harness wire between the
LPS and the glow-ECU, and repair if
necessary.
Replace the glow-ECU.


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MANUAL TRANSMISSION -Troubleshooting 22-4
OKOKOK
NG
NG
NG(1),(2) NG
Check the following connector:D-114
Repair OK
OK
OK
Measure at transfer-ECU connector
E-105.
DECU terminal voltage
measurement
DIgnition switch: ON
DVoltage between terminal 5 and
earth
OK:Acceleratorpedalfully
closed
800 - 1,000 mV
Acceleratorpedalfully de-
pressed
3,700 - 4,900 mV
Check the following connector:E-105
Check the trouble symptoms.OK
Check the following connectors:
E-105, E-113 NG
Replace the transfer-ECU. OK
NGRepairAdjust
Check the harness wire between the
LPS and the transfer-ECU, and
repair if necessary.
Check the harness wire between the
LPS and the transfer-ECU, and
repair if necessary.
From the previouspage
(3)NG
Measure at LPS connector B-02.
DUse the test harness
(MD998464) to connect connector
terminals No. 1, No. 2, No.3
only, and measure at the pick-up
harness.
DIgnition switch: ON
(1) Voltage between terminal 3 and
earth
OK:0.5 V or less
(2) Voltage between 2 and earth
(Ignition switch: ON)
OK:4.8 - 5.2 V
(3) Voltage between terminal 1 and
earth
OK:Acceleratorpedalfully re-
leased
800 - 1,000 mV
Acceleratorpedalfully de-
pressed
3,700 - 4,900 mV
NGAdjust the LPS.
(Refer to GROUP 17 - Emission
Control System)
Check the following connectors:
E-113, E-105
Repair
Check the harness wire between the
LPS and the glow-ECU, and repair if
necessary.


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MANUAL TRANSMISSION -4WD Indicator-ECU/Transfer-ECU22-18
Terminal No.Inspection itemInspection condition
1: Ignition switchInspection condition
2: Transfer lever positionTerminal voltage
1Free wheel engageON2HSystem voltage
switch
4H*10V
24WD detectionON2HSystem voltage
switch
4H, 4L0V
3Ignition switch (IG1)OFF-0V
ON-System voltage
6HI/LOW detection
switchONShifting from 4H to 4L
or vice versaSystem voltage
2H, 4H, 4L0V
7Free wheel clutchON4H, 4L0V
changeover solenoid
valve
2H*2System voltage
104WD Indicator lampON2H0V
4H, 4LSystem voltage
NOTE
*1:When vehicle has been moved once.
*2:Shift the lever from 4H to 2H, and then turn the ignition switch to OFF and then back to ON.
TRANSFER-ECU
Measure the terminal voltage (Refer to P.22-3).


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