2000 MITSUBISHI MONTERO Service Repair Manual

DIESEL FUEL <4M4> -Troubleshooting13C-30
Inspection procedure 16
Abnormal black smoke
Probable cause
Probable causes can be found in troubles with control system, injectionpump,
fuel system, intake system, and EGR system.DControl system inoperative
DInjection pump inoperative
DFuel system inoperative
DIntake system inoperative
DEGR system inoperative
DEngine-ECU inoperative
NG
Repair
MUT-
IISelf-Diag code
Is a diagnosis code output?YESInspection chart for diagnosis codes (Refer to P.13C-7.)
NO
Conduct MUT-IIData list check and an actuator test. (Refer
to P.13C-32, 37.)OKInspect the following items in order:
DAir cleaner
DInjection nozzle
DThrottle body assembly
DEGR system
DTurbocharger
DInjection pump
Inspection procedure 17
Abnormal white smoke
Probable cause
Probable causes can be found in troubles with control system, injectionpump,
fuel system, intake system, EGR system, and glow system.DControl system inoperative
DInjection pump inoperative
DFuel system inoperative
DIntake system inoperative
DEGR system inoperative
DGlow system inoperative
DEngine-ECU inoperative
NG
Repair
MUT-
IISelf-Diag code
Is a diagnosis code output?YESInspection chart for diagnosis codes (Refer to P.13C-7.)
NO
Conduct MUT-IIData list check and an actuator test. (Refer
to P.13C-32, 37.)OKInspect the following items in order:
DGlow plug, glowplugrelay
DInjection nozzle
DThrottle body assembly
DEGR system
DTurbocharger
DInjection pump


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DIESEL FUEL <4M4> -Troubleshooting13C-31
Inspection procedure 18
Hunting during driving
Probable cause
Probable causes can be found in troubles with control system, injectionpump,
and fuel system.DControl system inoperative
DInjection pump inoperative
DFuel system inoperative
DEngine-ECU inoperative
NG
Repair
MUT-
IISelf-Diag code
Is a diagnosis code output?YESInspection chart for diagnosis codes (Refer to P.13C-7.)
NO
Conduct MUT-IIData list check and an actuator test. (Refer
to P.13C-32, 37.)OKInspect the following items in order:
DInjection nozzle
DInjection pump
Inspection procedure 19
Engine-ECU power supply and earth circuit check
(5) NG
Check the trouble symptoms.
NG
Repair
(2), (3) NGOK
Check the trouble symptoms.
OK
NG
Check the harness between the
engine-ECU and the ignition switch.
Ignition switch check
(4) NG
Check and repair the harness
between the engine-ECU and the
earth.
OK
Check the following connectors:
D-110, D-111, D-112
NG
Replace the engine-ECU.
OK
Check the trouble symptoms.
Check the following connectors:
D-27, E-13Repair NG
NG
RepairCheck the following connector:
D-21
NG
Check and repair the harness
between the engine-ECU and the
control relay connector.
NG
Repair
OK
Check the trouble symptoms.NGCheck and repair the harness
between the engine-ECU and the
battery.
Check the following connector:
D-208, D-223, E-13NG
RepairMeasure at D-110, D-111, D-112
engine-ECU connectors.
DDisconnect the connector and
measure at the harness side.
(1) Voltage between 82 and the
earth (Ignition switch: ON)
OK:
System voltage
(2) Voltage between 46 and the
earth
OK:
System voltage
(3) Voltage between 12, 25 and the
earth (Ignition switch: ON)
OK:
System voltage
(When terminal 62 is short
circuited to theearth)
(4) Continuity between 13, 26 and
the earth
OK
:Continuity
(5) Voltage 80 and the earth
OK:
System voltage(1) NG
OK


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DIESEL FUEL <4M4> -Troubleshooting13C-32
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.
1613C-11
sensorWhen 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 cool-
ant temper-
ature sensorIgnition switch: ON or
the engine runningWhen the engine cool-
ant temperature is
-20_C-20_CCode No.
1513C-11
When the engine cool-
ant temperature is
0_C0_C
When the engine cool-
ant temperature is
20_C20_C
When the engine cool-
ant temperature is
40_C40_C
When the engine cool-
ant temperature is
80_C80_C
03BarometricIgnition switch: ONAltitude 0 m101 kPaCode No.13C-10
pressureAltitude 600 m95 kPa13
sensorAltitude 1,200 m88 kPa
Altitude 1,800 m81 kPa
04Boost pres-DEngine coolantAltitude 0 m101 kPaCode No.13C-9
sure sensortemperature:Altitude 600 m95 kPa12
80 - 95_C
DLamps, electricalAltitude 1,200 m88 kPa
cooling fan, andAltitude 1,800 m81 kPaaccessories: OFF
DTransmission: PIdling81 - 109 kPaDTransmission: P
range
DIgnition switch: ON
When sudden racing is
doneIncreased
05Fuel tem-
peratureIgnition switch: ON or
the engine runningWhen the fuel temper-
ature is - 20_C-20_CCode No.
1413C-10
sensorWhen the fuel temper-
ature is 0_C0_C
When the fuel temper-
ature is 20_C20_C
When the fuel temper-
ature is 40_C40_C
When the fuel temper-
ature is 80_C80_C


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DIESEL FUEL <4M4> -Troubleshooting13C-33
Item
No.Reference
page Code No.
or inspec-
tion proce-
dure No. Value to be
determined
as normal Inspection conditions Check item
06Vehicle
speed sen-
sorWhen drivingCompare the engine
speed displayed in the
speed meter with that
in MUT-IIMatchedCode No.
1713C-12
07Engine
speed sen-Engine: CrankingCompare the engine
speed displayed in theMatchedCode No.
1813C-13
sor (backup)Engine: Idlingtachometer with that in
MUT-II
08Engine
speed sen-Engine: CrankingCompare the engine
speed displayed in theMatchedCode No.
2113C-14
sorEngine: Idlingtachometer with that in
MUT-II
09Accelerator
pedal posi-Ignition switch: ONAccelerator pedal:
Idling position0.9 - 1.1VCode No.
1113C-8
tion sensor
(main)Accelerator pedal:
Fully opened position4.1 V or high-
er
10Idle switchIgnition switch: ONRelease the foot from
the accelerator pedal.0-1VCode No.
2313C-15
Step on the accelera-
tor pedal slightly4V or higher
11System volt-
ageIgnition switch: ONSystem volt-
ageProcedure
No. 1913C-31
13Timing con-Engine: After warmingIdling0%*1Code No.13C-16
trol valve*1up the engine2,500 r/min35 - 45%*125 or No.13C-20
High idling20 - 30%*143
14EGR com-
mand valueEngine: Idling0 - 100%*2–-
mand value
Engine: After warming up the engine
17Control
sleeve posi-Engine: After warming
up the engineIdling1.535 -
1.735 VCode No.
2613C-17
tion (target
value)2,500 r/minSlightly de-
creased.
High idling1.884 -
2.084 V
18Actual injec-Engine: After warmingIdling0.65 - 0.85 V––
tion timingup the engine2,500 r/min2.325 -
2.525 V
High idling3.814 -
4.014 V
19InjectionEngine: After warmingIdling0.3 - 0.5 V––
timing com-
mand valueup the engine2,500 r/min2.325 -
2.525 V
High idling3.814 -
4.014 V


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DIESEL FUEL <4M4> -Troubleshooting13C-34
Item
No.Reference
page Code No.
or inspec-
tion proce-
dure No. Value to be
determined
as normal Inspection conditions Check item
21GE actuatorEngine: After warmingIdling20 - 30%Code No.13C-17
up the engine2,500 r/min20 - 30%26 or No.13C-21
High idling20 - 29%48
22EGR dutyEngine: Idling0 - 100%*2––
valueEngine: After warming up the engine
23Control
sleeve posi-Engine: After warming
up the engineIdling1.535 -
1.735 VCode No.
2613C-17
tion (actual
value)2, 500 r/minSlightly de-
creased.
High idling1.884 -
2.084 V
24Accelerator
pedal posi-Ignition switch: ONAccelerator pedal:
Idling position0.9 - 1.1 VCode No.
2713C-18
tion sensor
(sub)Accelerator pedal:
Fully opened position4.1V or
higher
25Accelerator
pedal posi-Ignition switch: ONAccelerator pedal:
Idling position0%Code No.
2713C-18
tion sensor
(sub)Accelerator pedal:
Fully opened position99 - 100%
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 repeatedRelease the foot from
the accelerator pedal.ON––
accelerator operation)Step on the accelerator
pedal slightly.OFF
43A/C switchEngine: Idling (The
A/C compressorA/C switch: ONON––
should be in operation
when the A/C switch is
“ON”)A/C switch: OFFOFF
44IgnitionIgnition switch: ONEngine: StopOFF––
switch-STEngine: 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)––
A/C switch: ONON (A/C
compressor
clutch in op-
eration)


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DIESEL FUEL <4M4> -Troubleshooting13C-35
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 tem-
perature at 109_Cor
higher)
A/C switch: ON
(engine coolant tem-
perature at 109_Cor
higher or no higher
than 109_C and the
vehicle speed at 60
km/h or slower)ON––
A/C switch: OFF
(engine coolant tem-
perature at 109_Cor
lower)
A/C switch: ON
(engine coolant tem-
perature at 109_Cor
lower or no higher than
109_C and the vehicle
speed at 60 km/h or
faster)OFF
52Glow plug
relayIgnition switch:
OFF®ONEngine coolant tem-
perature at 60_Cor
lowerON––
Engine coolant tem-OFF
perature at 60_Cor
higher
53Main throttleIgnition switch: ON (Engine stops)OFF––
solenoid
valveEngine: Idling after warming up the engineON
54Sub throttleEngine: Idling after warming up the engineOFF––
solenoid
valveEngine: Idling®Stop (within 3 seconds)ON
55EngineIgnition switch: OFF®ONON (For 5Procedure13C-25
warning
lampseconds)No. 3
56Glow lampIgnition switch:
OFF®ONThe engine coolant
temperature at 60_C
or lowerON––
The engine coolant
temperature at 60_C
or higherOFF


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DIESEL FUEL <4M4> -Troubleshooting13C-36
Item
No.Reference
page Code No.
or inspec-
tion proce-
dure No. Value to be
determined
as normal Inspection conditions Check item
58NeutralIgnition switch: ONN, P rangeN, P––
switchNone of the aboveD, R
60Fuel cut
relayIgnition switch: ON®OFF afterwards for a
certain period of timeON––
None of the aboveOFF
61EGR controlTurning off EGR quicklyON––
solenoid
valve No. 2None of the aboveOFF
62AT/MTIgnition switch: ONVehicles with A/TA/T––
switchVehicles with M/TM/T
68A/C switch 2A/C: Under high load or low loadON––
A/C: OFF or under medium loadOFF
69Warm up
switchDWarm up switch: ON
DHeater temperature setting: Maximum
DEngine coolant temperature: 90_C or lower
DBlower fan: ONON––
None of the aboveOFF
70PTC heaterDWarm up switch: ON
DHeater temperature setting: Maximum
DEngine coolant temperature: 65_Cto75_C
or lower
DBlower fan: ONON––
None of the aboveOFF
71PowerPower steering switch: ONON––
steering
switchPower steering switch: OFFOFF


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DIESEL FUEL <4M4> -Troubleshooting13C-37
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 theIgnition switch:Battery charge is––
relay from
OFF to ON orONenergized to the glow
plug when the glow
from ON to
OFFplug relay is ON.
03A/C compressorTurning theIgnition switch:The A/C compressor––
relayrelay from
OFF to ON orONclutch makes an
audible sound.
from ON to
OFF
11Timing control
valveTurn the
timing control
valve to ONDIgnition
switch: ON
DEngine:
IdlingMakes an audible
soundCode
No.4313C-20
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 onProcedure
No.3, 413C-25
22Condenser fan
relayTurning the
relay from
OFF to ON or
from ON to
OFFIgnition switch:
ONThe condenser fan
rotates.––
23Main throttle
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.4113C-19
24Sub throttle
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
sound––


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