2000 MITSUBISHI MONTERO coolant

DIESEL FUEL <4D5-stepIII>-Troubleshooting13E-21
Code No. 43 Timing control valve systemProbable cause
Range of Check
DEngine coolant temperature 80_C or higher and the engine running
Set Conditions
DTarget value minus actual value is 0.64 V or more for 5 secondsDTiming control valve inoperative
DTiming control valve open circuit, short circuit, or
connector contact inoperative
DEngine-ECU inoperative
DBlockage in fuel system
OK
OK
Check and repair the harness between the
control relay and the injection pump
assembly connector.
Timing control valve check
(Refer to P.13E-61.)
Replace the engine-ECU. OK
RepairCheck the following connector:D-110
Check the trouble symptoms.NG NG NG
Check the following connector:B-38NG
Repair
OK
Check the trouble symptoms.
NG
NGMeasure at D-110 engine-ECU connector.
DDisconnect the connector and measure at
the harness side.
DVoltage between 3 and the earth
(Ignition switch: ON)
OK:11 V or higherOK
Measure at B-38 injection pump assembly
connector.
DDisconnect the connector and measure at
the harness side.
DVoltage between 5 and the earth
(Ignition switch: ON)
OK:System voltage
Replace injection pump assembly.
Check and repair the harness between the
engine-ECU and the injection pump
assembly connector.
Fuel system blockage check
DFuel filter blocked
DFuel hose blocked or bent
DFuel tank filter blockedOK
Replace NG
NG


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DIESEL FUEL <4D5-stepIII>-Troubleshooting13E-36
INSPECTION PROCEDURE 19
A/C condenser fan operating problem
Probable cause
The power transistor inside the engine-ECU turns on and off to control the A/C
condenser fan motor relay.DMalfunction of A/C condenser fan motor relay
DMalfunction of A/C condenser fan motor
DMalfunction of thermostat
DOpen circuit or short-circuit in circuit, or poor
connector contact
DMalfunction of engine-ECU
Check the following connector:D-110
OK
Measure at engine-ECU connector D-110.
DDisconnect the connector and measure at the harness
side.
DCheck the A/C condenser fan condition.
(Ignition switch: ON)
OK:Fan stopped
DVoltage between 7 and the earth
(Ignition switch: ON)
OK:System voltage
DShort out 7 and the earth
(Ignition switch: ON)
OK:A/C condenser fan turnsNGA/C condenser fan motor circuit check
(Refer to the wiring harness configuration diagram.)
OK
MUT-IIData list
02 Engine coolant temperature sensor
OK:When engine is idling after having warmed up, the en-
gine coolant temperature and the MUT-IIdisplay temper-
ature are identicalNGEngine coolant temperature sensor check
(Refer to Code 15 on P.13E-59.)
Check the trouble symptoms.OK
Replace the engine-ECU.NG
Repair
Thermostat checkNG
NGReplace
OK


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DIESEL FUEL <4D5-stepIII>-Troubleshooting13E-39
INSPECTION PROCEDURE 24
Glow plug relay inspection
NG
Replace the engine-ECU.
OK
Check the trouble symptoms.
OK
Measure at glow plug relay
connector B-42.
DDisconnect the connector and
measure at the harness side.
DVoltage between 1 and the earth
(Ignition switch: ON)
(Engine coolant temperature:
40_C or lower)
OK:System voltage (for 1 - 8 sec-
onds after ignition switch is
turned to ON)NGCheck the following connector:
D-110NG
Repair
Glow plug relay check. (Refer to
GROUP 16 - Glow System.)NG
Replace
Check glow plug relay connector
B-42, and repair if necessary.OK
OK
Check the harness between the
engine-ECU and the glow plug relay
connector.NG
Repair
INSPECTION PROCEDURE 25
A/C switch and A/C relay inspection
Replace the engine-ECU.
OK
Check the trouble symptoms.
Measure at engine-ECU connector
D-110 or D-111.
DDisconnect the connector and
measure at the harness side.
DVoltage between 21 and 32 and
the earth (Ignition switch: ON)
OK:0 - 3 V (A/C switch: OFF)
System voltage (A/C
switch: ON)
DShort out 21 and the earth
(Ignition switch: ON)
(A/C switch: ON)
OK:A/C compressor clutch
turns onOKCheck the following connectors:
D-110, D-111NG
Repair
A/C system check
(Refer to GROUP 54 - Service
Adjustment Procedures.)NGOK


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DIESEL FUEL <4D5-stepIII>-Troubleshooting13E-40
DATA LIST REFERENCE TABLE
Item
No.Check itemInspection conditionsValue to be
determined
as normalCode No.
or inspec-
tion proce-
dure No.Reference
page
01Boost air
temperatureIgnition switch: ON or
the engine runningWhen the intake air
temperature is - 20_C-20_CCode No.
1613E-12
p
sensor
gg
When the intake air
temperature is 0_C0_C
When the intake air
temperature is 20_C20_C
When the intake air
temperature is 40_C40_C
When the intake air
temperature is 80_C80_C
02Engine
coolant
temperatureIgnition switch: ON or
the engine runningWhen the engine
coolant temperature is
-20_C-20_CCode No.
1513E-12
p
sensorWhen the engine
coolant temperature is
0_C0_C
When the engine
coolant temperature is
20_C20_C
When the engine
coolant temperature is
40_C40_C
When the engine
coolant temperature is
80_C80_C
03BarometricIgnition switch: ONAltitude 0 m101 kPaCode No.
13
13E-11
pressure
sensor
g
Altitude 600 m95 kPa13
sensorAltitude 1,200 m88 kPa
Altitude 1,800 m81 kPa
04BoostDEngine coolant
tt
Altitude 0 m101 kPaCode No.
12
13E-10
pressure
sensor
g
temperature:
80-95_CAltitude 600 m95 kPa12
sensor80-95_C
DLamps, electricalAltitude 1,200 m88 kPaLamps,electrical
cooling fan, and
accessories:OFFAltitude 1,800 m81 kPaaccessories:OFF
DTransmission:Idling81 - 109 kPaDTransmission:
Neutral
DIgnition switch: ONWhen sudden racing is
doneIncreased
05Fuel
temperatureIgnition switch: ON or
the engine runningWhen the fuel
temperature is - 20_C-20_CCode No.
1413E-11
p
sensor
gg
When the fuel
temperature is 0_C0_C
When the fuel
temperature is 20_C20_C
When the fuel
temperature is 40_C40_C
When the fuel
temperature is 80_C80_C


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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-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-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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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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