engine MITSUBISHI MONTERO 2000 Service Repair Manual

DIESEL FUEL <4D5-stepIII>-Troubleshooting13E-42
Item
No.Reference
page Code No.
or inspec-
tion proce-
dure No. Value to be
determined
as normal Inspection conditions Check item
25Accelerator
pedal
position
Ignition switch: ONAccelerator pedal:
Idling position0%Code No.
2713E-19
position
sensor (sub)Accelerator pedal:
Fully opened position99 - 100 %
31EGR valve
position
Engine: After warming
uptheengine
Idling under no load2.3 - 3.3 VCode No.
51
13E-25
position
sensor (tar-
get value)upthe engine
Engine is suddenly
racedMomentarily
decreases
(0.3 - 0.7 V)
51
32EGR valve
position
Engine: After warming
uptheengine
Idling under no load2.3 - 3.3 VCode No.
51
13E-25
position
sensor (ac-
tual value)upthe engine
Engine is suddenly
racedMomentarily
decreases
(0.3 - 0.7 V)
51
33Variable
geometry
Engine: After warming
uptheengine
Idling53 - 59 kPaCode No.
52
13E-26
geometry
control pres-
sure sensorupthe engine
Engine is suddenly
racedMomentarily
increases
52
NOTE
*1: The opening degree of the timing control valve is converted into percentage. (0 %: timer non-advanced angle,
100 %: timer maximum advanced angle)
*
2: The opening degree of the EGR solenoid valve is converted into percentage.
Item
No.
Check itemInspection conditionsValue to be
determined
as normalCode No.
or inspec-
tion proce-
dure No.Reference
page
41Idle switchIgnition switch: ON
(check by repeated
acceleratoroperation)
Release the foot from
the accelerator pedal.ONCode No.
2313E-16
y
accelerator operation)Step on the accelerator
pedal slightly.OFF
43A/C switchEngine: Idling (The
A/C compressor
shouldbeinoperation
A/C switch: ONONProcedure
No. 2513E-39
shouldbein operation
when the A/C switch is
“ON”)A/C switch: OFFOFF
44Ignition
ihST
Ignition switch: ONEngine: StopOFF––g
switch-ST
g
Engine: CrankingON
45Ignition
switch-IGIgnition switch: ONON––
46Control
relayIgnition switch: ONON––
47A/C relayEngine: Idling after
warming up the engineA/C switch: OFFOFF (A/C
compressor
clutch not in
operation)Procedure
No. 2513E-39
A/C switch: ONON (A/C
compressor
clutch in
operation)


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DIESEL FUEL <4D5-stepIII>-Troubleshooting13E-43
Item
No.Check itemInspection conditionsValue to be
determined
as normalCode No.
or inspec-
tion proce-
dure No.Reference
page
50Condenser
fan relayIgnition switch: ONA/C switch: OFF
(engine coolant
temperature at 102_C
or higher)
A/C switch: ON
(engine coolant
temperature at 102_C
or higher, or outside
temperature at 15_C
or higher)ONProcedure
No. 1913E-36
Condenser
fan relayIgnition switch: ONA/C switch: OFF
(engine coolant
temperature at 95_C
or lower)
A/C switch: ON
(engine coolant
temperature at 95_Cor
lower, or outside
temperature at 15_C
or lower)OFF
52Glow plug
relayDIgnition switch:
ONRelay not drivenOFFProcedure
No. 2413E-39
relayON
DSelect actuator
test item No. 02.Relay is forcibly drivenON
No.24
53Throttle
solenoid
Ignition switch: ON (Engine stops)OFFCode No.
41
13E-20
solenoid
valveEngine: main sensor or actuator is failedON41
55Engine
warningDIgnition switch:
ON
S
Engine warning lamp
offOFFProcedure
No. 313E-30
g
lampDSelect actuator
test item No. 16.Engine warning lamp is
forced onON
56Glow lampDIgnition switch:
ONGlow lamp offOFF––
ON
DSelect actuator
test item No. 15.Glow lamp is forced onON
60Fuel cut
relay
DIgnition switch: ON
DSelectactuator
Relay not drivenOFFProcedure
No21
13E-37
relayDSelectactuator
test item No. 27.Relay is forcibly drivenONNo.21
62AT/MT
switchIgnition switch: ONVehicles with M/TM/T––
73EGR control
solenoidEngine: After warming
up the engineIdling under no load
(stable condition)OFFProcedure
No. 2213E-38
valve No. 1
pg
Engine is suddenly
raced (EGR amount
decreasing)OFF
Engine is suddenly
raced (EGR amount
increasing)ON (momen-
tarily)
74EGR control
lid
Engine: After warming
hi
Idling (stable condition)ONProcedure
N
13E-38
solenoid
valve No. 2
gg
up the engineWhen engine is sud-
denly raced (EGR
amount decreasing)OFF (mo-
mentarily)No. 23
When engine is sud-
denly raced (EGR
amount increasing)ON


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DIESEL FUEL <4D5-stepIII>-Troubleshooting13E-44
ACTUATOR TEST TABLE
Item
No.Check itemDrive Con-
tentsInspection
conditionsValue to be determined
as normalCode No.
or inspec-
tion proce-
dure No.Reference
page
02Glow plug relayTurning the
relayfrom
Ignition switch:
ON
Battery charge is
energizedtotheglow
Procedure
No24
13E-39
relayfrom
OFF to ON or
fromONto
ONenergizedtotheglow
plug when the glow
plugrelayisON
No.24
fromONto
OFFplug relayisON.
03A/C compressor
relay
Turning the
relayfrom
Ignition switch:
ON
The A/C compressor
clutchmakesan
Procedure
No25
13E-39
relayrelayfrom
OFF to ON or
fromONto
ONclutchmakes an
audible sound.No.25
fromONto
OFF
11Timing control
valveTurn the
timing control
valve to ONDIgnition
switch: ON
DEngine:
Idlin
g
Makes an audible
soundCode No.
4313E-21
12Turn the
timing control
valve to OFF
Idling
DTimer piston
position
sensor:
Normal
15Glow lampTurn the glow
lamp on or offIgnition switch:
ONThe glow lamp turns
on.––
16Warning lampTurn the
warning lamp
on or offIgnition switch:
ONThe warning lamp
turns on.Procedure
No. 3, 413E-30
22Condenser fan
relayTurning the
relay from
OFF to ON or
from ON to
OFFIgnition switch:
ONThe condenser fan
rotates.Procedure
No. 1913E-36
23Throttle solenoid
valveTurn the
solenoid
valve from
OFF to ON or
from ON to
OFFDIgnition
switch: ON
DVehicle
speed:
0 km/h
DEngine
speed:
1,000 r/min
or lowerMakes an audible
soundCode No.
4113E-20
25GE actuatorTurn the GE
actuator to
ONDIgnition
switch: ON
DEngine
speed:
0 r/min orMeasure the wave
pattern between
engine-ECU connec-
tor terminals No. 1
and No. 15 using anCode No.
4813E-23
26Turn the GE
actuator to
OFF
0r/minor
lower
DControl
sleeve posi-
tion sensor:
Normal
andNo.15usingan
analyzer and check
the change in the duty
ratio.


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DIESEL FUEL <4D5-stepIII>-Troubleshooting13E-45
Item
No.Reference
page Code No.
or inspec-
tion proce-
dure No. Value to be determined
as normal Inspection
conditions Drive Con-
tents Check item
27Fuel cut solenoid
valveTurn the
solenoid
valve from
OFF to ON or
from ON to
OFF.DIgnition
switch: ON
DVehicle
speed:
0 km/hMakes an audible
sound––
34Middle position
of GE actuatorHold the
injection
governor in
its middle
position.DIgnition
switch: ONWhen the crankshaft
is turned clockwise
during the adjustment
of the injection timing,
the injection pipes
spray out fuel.Code No.
4813E-23
35Variable
geometry
solenoid valveTurn the
solenoid
valve to ONIgnition switch:
ONMakes an audible
soundCode No.
4913E-24
36Turn the
solenoid
valve to OFFEngine: IdlingOperating sound and
vibration, which
accompany with the
duty activation, cease.
37EGR control
solenoid valve
No. 1Turn the
solenoid
valve from
OFF to ON
from ON to
OFFIgnition switch:
ONMakes an audible
soundProcedure
No. 2213E-38
38EGR control
solenoid valve
No. 2Turn the
solenoid
valve from
OFF to ON
from ON to
OFFIgnition switch:
ONMakes an audible
soundProcedure
No. 2313E-38


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DIESEL FUEL <4D5-stepIII>-Troubleshooting13E-47
Terminal
No.Normal condition: Inspection conditions (engine status) Check item
21A/C relayA/C switch: OFF→ONSystem voltage→0-1
V
31Idle switchIgnition switch: ONRelease the foot from the
accelerator pedal.0-1V
Step on the accelerator
pedal slightly3 V or higher
32A/C switchA/C in operation (compressor in operation)System voltage
36Selector switch
between A/T and M/TIgnition switch: ONSystem voltage (M/T)
46Control relayIgnition switch: ON0-1V
Ignition switch: ON→OFF (in about 8 seconds)System voltage
51Pump speed sensorEngine: Idling (Use a digital voltage meter to check.)0V↔5V
(repeat the change)
55Accelerator pedal
position sensor (sub)Ignition switch: ONAccelerator pedal: Idling
position0.9 - 1.1 V
Accelerator pedal: Fully
opened position3.7 V or higher
60Sensor power supplyIgnition switch: ON4.6 - 5.4 V
71Ignition switch-STEngine: Cranking8 V or higher
80Back-up power supplyIgnition switch: OFFSystem voltage
81Power supply to accel-
erator pedal position
sensor (main)Ignition switch: ON4.6 - 5.4 V
82Ignition switch-IGIgnition switch: ONSystem voltage
83Engine coolant tem-
perature sensorIgnition switch: ONEngine coolant
temperature: 0_C3.7 - 4.3 V
Engine coolant
temperature: 20_C2.8 - 3.4 V
Engine coolant
temperature: 40_C1.9 - 2.5 V
Engine coolant
temperature: 80_C0.6 - 1.2 V
84Accelerator pedal posi-
tion sensor (main)Ignition switch: ONAccelerator pedal: Idling
position0.9 - 1.1 V
Accelerator pedal: Fully
opened position3.7 V or higher
85Boost pressure sensorIgnition switch: ON (101 kPa)1.0 - 1.4 V
86Vehicle speed sensorDIgnition switch: ON
DMove the vehicle forward slowly0V↔8 - 12 V
(repeat the change)
87Fuel temperature sen-
sor
Ignition switch: ONFuel temperature: 0_C3.2 - 3.6 V
sorFuel temperature: 20_C2.3 - 2.7 V
Fuel temperature: 40_C1.5 - 1.9 V
Fuel temperature: 80_C0.4 - 0.8 V


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DIESEL FUEL <4D5-stepIII>-Troubleshooting13E-48
Terminal
No.Normal condition: Inspection conditions (engine status) Check item
88Boost air temperature
sensorIgnition switch: ONIntake air temperature:
0_C3.2 - 3.8 V
Intake air temperature:
20_C2.3 - 2.9 V
Intake air temperature:
40_C1.4 - 2.0 V
Intake air temperature:
80_C0.4 - 1.0 V
89Crank angle sensorEngine: Idling (Use a digital voltage meter to check.)0V↔5V
(repeat the change)
90EGR valve position
sensor
Engine: After warm-
inguptheengine
Idling under no load2.3 - 3.3 V
sensoring up the engineEngine is suddenly racedMomentarily drops from
voltage during idling
91Parking switchIgnition switch: ON
(Enginestops)
Parking brake: ON0-1V
(Engine stops)Parking brake: OFFSystem voltage
CHECK CHART FOR RESISTANCE AND CONTINUITY
BETWEEN TERMINALS
1. Turn the ignition switch to LOCK (OFF) position.
2. Disconnect the engine-ECU connector.
3. Measure the resistance and check for continuity between
the terminals of the engine-ECU harness-side connector
while referring to the check chart.
NOTE
(1) When measuring resistance and checking continuity,
a harness for checking contact pin pressure should
be used instead of inserting a test probe.
(2) Checking need not be carried out in the order given
in the chart.
Caution
If the terminals that should be checked are mistaken,
or if connector terminals are not correctly shorted
to earth, damage may be caused to the vehicle wiring,
sensors, engine-ECU and/or ohmmeter.
Be careful to prevent this!
4. If the ohmmeter shows any deviation from the standard
value, check the corresponding sensor, actuator and
related electrical wiring, and then repair or replace.
5. After repair or replacement, recheck with the ohmmeter
to confirm that the repair or replacement has corrected
the problem.


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DIESEL FUEL <4D5-stepIII>-Troubleshooting13E-50
Terminal No. Normal condition (Check condition)Inspection item
83 - 61Engine coolant temperature sensor5.1 - 6.5 kΩ(when the engine coolant temperature is
0_C)
2.1 - 2.7 kΩ(when the engine coolant temperature is
20_C)
0.9 - 1.3 kΩ(when the engine coolant temperature is
40_C)
0.26 - 0.36 kΩ(when the engine coolant temperature
is 80_C)
87 - 61Fuel temperature sensor5.1 - 6.5 kΩ(when the fuel temperature is 0_C)
2.1 - 2.7 kΩ(when the fuel temperature is 20_C)
0.9 - 1.3 kΩ(when the fuel temperature is 40_C)
0.26 - 0.36 kΩ(when the fuel temperature is 80_C)
88 - 61Boost air temperature sensor5.3 - 6.7 kΩ(when the intake air temperature is 0_C)
2.3 - 3.0 kΩ(when the intake air temperature is 20_C)
1.0 - 1.5 kΩ(when the intake air temperature is 40_C)
0.30 - 0.42 kΩ(when the intake air temperature is
80_C)


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ENGINE COOLING
Click on the applicable bookmark to selected the required model year.


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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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ENGINE COOLING -General Information/
Service Specifications/Lubricant/Sealant14-2
GENERAL INFORMATION
The cooling system is designed to keep every part
of the engine at appropriate temperature in
whatever condition the engine may be operated.
The cooling method is of the water-cooled, pressure
forced circulation type in which the water pump
pressurizes coolant and circulates it throughout the
engine. If the coolant temperature exceeds the
prescribed temperature, the thermostat opens to
circulate the coolant through the radiator as well
so that the heat absorbed by the coolant may be
radiated into the air.The water pump is of the centrifugal type and is
driven by the drive belt from the crankshaft.
The radiator is the corrugated fin, down flow type.
ItemsSpecifications
RadiatorPerformance kJ/h6G7203,023
4D5, 4M4232,326
SERVICE SPECIFICATIONS
ItemsStandard valueLimit
High pressure valve opening pressure of radiator cap kPa74 - 10364
Range of coolant antifreeze concentration of radiator %30 - 60-
ThermostatValve opening temper-6G788±
2.0-
ature of thermostat_
C4D582±
1.5-
4M476.5±
2.0-
Full-opening tempera-6G7100-
ture of thermostat_
C4D595-
4M490-
Valve lift mm6G710 or more-
4D5, 4M48.5 or more-
LUBRICANT
ItemApplicable modelAmount (including
condense tank) L
MITSUBISHI GENUINE COOLANT or equivalentVehicles without rear heater9.0
Vehicles with rear heater10.5
SEALANT
ItemsSpecified sealantRemarks
Cylinder block drain plug3M Nut Locking Part No. 4171 or equivalentDrying sealant


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