2000 MITSUBISHI MONTERO radiator

ENGINE <4M4> -Cylinder Head Gasket11C-32
"
DA
RADIATOR LOWER HOSE/RADIATOR UPPER
HOSE CONNECTION
1. Insert the hose up to the convex part of the thermostat
cover and water outlet pipe.
2. Align the mating marks on the radiator hose and the
hose clamp, and then install the hose.


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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-94
Inspection procedure 19
Low alternator output voltage (approx.12.3 V)
Probable cause
The cause is probably a malfunction of the alternator or one of the problems
listed at right.DMalfunction of the charging system
DOpen circuit between the alternator G terminal and
the engine-ECU
DMalfunction of the engine-ECU
NG
Repair
OK
Replace the engine-ECU.
OK
Check the alternator. (Refer to GROUP
16 - Charging System.)
OK
Check the following connectors:
B-41, B-59, D-119
Measure at the alternator connector
B-59.
DConnect the connector. (Use the
test harness MB991519)
DVoltage between 1 (black clip)
and earth
(Engine: Idling)
(Radiator fan: Not operating)
(Headlamp: OFF®ON)
(Stoplamp: OFF®ON)
(Rear defogger switch: OFF®
ON)
OK:
Voltage increased by
0.2 - 3.5 V.NGMeasure at the alternator connector
B-59.
DDisconnect the connector, and
measure at the harness side.
DDisconnect the engine-ECU
connector.
DContinuity between 1 and earth
OK:
No continuityNGCheck the harness wire between the
alternator and the engine-ECU, and
repair if necessary.
Inspection procedure 20
Idling speed is improper when A/C is operating
Probable cause
If the engine-ECU detects that the air conditioner is on, it activates the throttle control
servo to control idle-up operation.
The A/C-ECU judges if theloadcaused by air conditioner operation ishigh or low,
and converts it to voltage signal (high or low voltage) and inputs the signal to the
engine-ECU.
Based on this voltage signal, the engine-ECU controls the idle-up speed (forhigh
or low load).DMalfunction of the A/C control system
DImproper connector contact,opencircuit or
short-circuited harness wire
DMalfunction of the engine-ECU
NG
Repair
Measure at the engine-ECU connector D-117.
DConnect the connector.
DVoltage between 65 and earth (Engine: at idle, outside air
temperature: 25_C or more)
OK:
0 - 3 V [When A/C is MAX. COOL condition (when the
load by A/C is high)]
System voltage [When A/C is MAX. HOT condition (when
the load by A/C islow)]OKCheck the following connector:
D-117
OK
Check trouble symptom.
NG
Replace the engine-ECU.
NG
Check the A/C system. (Refer to GROUP 55 - On-vehicle Service.)


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GDI -Troubleshooting 13A-113
Terminal
No.Normal condition Check requirements (engine condition) Check item
47Power supplyIgnition switch: ONSystem voltage
59
50Camshaft position sensorEngine: Cranking0.4 - 3.0 V
Engine: Idling0.5 - 2.0 V
51Barometric pressure sensorIgnition switch:Altitude: 0 m3.7 - 4.3 V
ON
Altitude: 1,200 m3.2 - 3.8 V
52Alternator FR terminalDEngine: Warm up, and then idling
DRadiator fan: not operating
DHeadlamp: OFF®ON
DStop lamp: OFF®ON
DRear defogger: OFF®ONVoltage decreases
53Oxygen sensor (rear)DTransmission: 2nd gear
DEngine speed: 3,500 r/min or more
DDriving with the throttle valve widely
open0.6 - 1.0 V
54Power steering fluid
pressure switchEngine: Warm
up, and thenSteering wheel
stationarySystem voltage
idling
Steering wheel
turning0-3V
55Injector driver relayIgnition switch: OFF0 - 0.1 V
Ignition switch: ON0.5 - 1.0 V
56Throttle valve control servoIgnition switch: OFF0 - 0.3 V
relay
Ignition switch: ON0.5 - 1.0 V
57Engine control relayIgnition switch: OFF0-3V
Ignition switch: ONSystem voltage
60Back-up power sourceIgnition switch: OFFSystem voltage
61Air flow sensorEngine: Idling2.2 - 3.2 V
Engine: 2,500 r/min
62Intake air temperature
sensorIgnition switch:
ONIntake air temper-
ature: 0_C3.2 - 3.8 V
Intake air temper-
ature: 20_C2.3 - 2.9 V
Intake air temper-
ature: 40_C1.5 - 2.1 V
Intake air temper-
ature: 80_C0.4 - 1.0 V


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GDI -Troubleshooting 13A-153
Code No.64 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-A/T-ECU
OK
Check the harness wire between the
intermediate connector and the
engine-A/T-ECU, and repair if
necessary.NG
Repair
NG
Check the following connector:
D-120NG
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)
DSelector lever position: P
DRadiator fan: Not operating
DThe voltage between terminal 2
and earth
OK:
The voltage drops when
the Headlamp are turned
on.NG
Check the following connector:
B-59NG
Repair
OK
Check the trouble symptoms.
NG
Replace the engine-A/T-ECU.
OK
Check the harness wire between the
intermediate connector and the
engine-A/T-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-A/T-ECU
connector D-120.
DMeasure the voltage at the
engine-A/T-ECU terminal.
DIgnition switch: ON
DThe voltage between terminal 54
and earth
OK:
9 - 10 VNGCheck the following connector:
D-120
OK
NG
Repair
OK
Check the following connector:
D-120NG
Replace
OK
Check the trouble symptoms.NGReplace the engine-A/T-ECU.
OK
Check the harness wire between the
intermediate connector and the
engine-A/T-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-166
INSPECTION CHART FOR TROUBLE SYMPTOMS
Trouble symptomInspection
procedure
No.Reference page
CommunicationCommunication with all systems is not possible.113A-169
with MUT-IIis
impossible.
Communication with engine-A/T-ECU only is not possible.213A-169
Engine warning
lamp andThe engine warning lamp does not illuminate right after the
ignition switch is turned to the ON position.313A-170
related parts
The engine warning lamp remains illuminating and never goes
out.413A-170
StartingNo initial combustion (starting impossible)513A-171
Initial combustion but no complete combustion
(starting impossible)613A-172
Long time to start (improper starting)
Idling stabilityUnstable idling (Rough idling, hunting)713A-174
(Improper idling)
Idling speed is high. (Improper idling speed)813A-176
Idling speed is low. (Improper idling speed)
Idling stabilityWhen the engine is cold, it stalls at idling. (Die out)913A-177
(Engine stalls)
When the engine is hot, it stalls at idling. (Die out)1013A-178
The engine stalls when starting the car. (Pass out)1113A-180
The engine stalls when decelerating.1213A-181
DrivingHesitation, sag or stumble1313A-182
Poor acceleration
Surge
The feeling of impact or vibration when accelerating1413A-183
The feeling of impact or vibration when decelerating1513A-184
Knocking1613A-184
Dieseling1713A-184
Too high CO and HC concentration when idling1813A-185
Low alternator output voltage (approx. 12.3 V)1913A-186
Engine idle speed is incorrect while the A/C is on (A/C switch 2 signal).2013A-187
Fans (radiator fan, A/C condenser fan) are inoperative2113A-187
GDI ECO indi-GDI ECO indicator lamp does not illuminate.2213A-188
cator lamp sys-
tem
GDI ECO indicator lamp remains illuminated and does not go off.2313A-188


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DIESEL FUEL <4M4> -General Information13C-2
GENERAL INFORMATION
The electronically-controlled fuel injection system consists of sensors which detect the condition of the
diesel engine, an engine-ECU which controls the system based on signals from these sensors, and actuators
which operate according to control commands from the engine-ECU.
The engine-ECU carries out operations such as fuel injection rate control, fuel injection timing control
and idle up control. In addition, the engine-ECU is equipped with several self-diagnosis functions which
make troubleshooting easier in the event that a problem develops.
FUEL INJECTION RATE CONTROL
The fuel injection completion timing is controlled by means of a solenoid-type spill valve to ensure that
the optimum amount of fuel is supplied to the engine in accordance with gradual changes in the engine
running condition.
Before fuel injection starts, the solenoid-type spill valve is on (energized), so that the valve is closed.
As the plunger turns and rises, fuel is sent out under pressure, and when the fuel flow rate reaches
the target value for fuel injection, the solenoid-type spill valve turns off. When the solenoid-type spill
valve turns off, the fuel under high pressure inside the plunger is leaked out into the pump chamber
and fuel injection is completed.
FUEL INJECTION TIMING CONTROL
The position of the injection pump timer piston is controlled so that fuel injection is carried out at the
optimum timing in accordance with the engine running condition.
The timer piston position is determined by duty control of the timing control solenoid valve which is located
in the line between the high-pressure chamber and the low-pressure chamber of the timer piston.
The fuel injection timing is advanced by increasing the control duty of the timing control solenoid valve.
IDLE SPEED CONTROL
Controlling the fuel injection rate in accordance with the engine running condition maintains the idle speed
at the optimum condition.
SELF-DIAGNOSIS FUNCTION
DWhen an abnormality is detected in any of the sensors or actuators, the engine warning lamp illuminates
to warn the driver.
DWhen an abnormality is detected in any of the sensors or actuators, a diagnosis code number
corresponding to the problem which occurred is output.
DThe RAM data relating to the sensors and actuators which is stored in the engine-ECU can be read
using the MUT-II. In addition, the actuators can be force-driven under certain conditions.
OTHER CONTROL FUNCTIONS
1. Power Supply Control
When the ignition switch is turned to ON, the relay turns on and power is supplied to components
such as the timing control solenoid valve.
2. Intake Air Throttle Control
When the engine is idling after having warmed up, the throttle valve is half opened to restrict the
amount of intake air in order to reduce vibration and noise.
3. A/C Relay Control
Turns the compressor clutch of the A/C ON and OFF
4. Fan motor relay control
The radiator fan and condenser fan operating speeds are controlled in accordance with the engine
coolant temperature and the vehicle speed.
5. Glow Control
Refer to GROUP 16.
6. EGR Control
Refer to GROUP 17.


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14-1
ENGINE COOLING
CONTENTS
GENERAL INFORMATION 2..................
SERVICE SPECIFICATIONS 2.................
LUBRICANT 2...............................
SEALANT 2..................................
ON-VEHICLE SERVICE 3.....................
Engine Coolant Leak Checking 3................
Radiator Cap Valve Opening Pressure Check
3 .............................................Engine Coolant Replacement 3..................
Concentration Measurement 5...................
COOLING FAN 6.............................
THERMOSTAT 8.............................
WATER PUMP 11............................
WATER HOSE AND WATER PIPE 15........
RADIATOR 20...............................


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