2000 MITSUBISHI MONTERO compressor

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-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-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-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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INTAKE AND EXHAUST -Intake and Exhaust Manifold,
Turbocharger <4D5>15-13
INSTALLATION SERVICE POINT
"
AA
TURBOCHARGER ASSEMBLY INSTALLATION
1. Check the internal surface, the eye bolt and the
mating surface of the oil pipe and water pipe for
clogging, and clean if necessary.
2. If deposits of carbon are accumulated on the
turbocharger oil passage, remove them and clean
using the compressed air.
Caution
Be careful not to allow foreign material to enter the
turbocharger.
3. Add clean engine oil through the oil feed pipe port
on the turbocharger.
INSPECTION
TURBOCHARGER ASSEMBLY CHECK
DVisually check the turbine wheel and the compressor
wheel for cracking or other damage.
DCheck whether the turbine wheel and the compressor
wheel can be easily turned by hand.
DCheck for oil leakage from the turbocharger assembly.
DCheck whether or not the waste gate valve remains open.
If any problem is found, replace the part after disassembly.
OIL PIPE AND OIL RETURN PIPE CHECK
Check the oil pipe and oil return pipe for clogging, bending,
or other damage. If there is clogging, clean it.
EXHAUST MANIFOLD CHECK
Damage or cracking of any part.


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INTAKE AND EXHAUST -Turbocharger and Exhaust
Manifold <4M4>15-15
INSTALLATION SERVICE POINT
"
AA
TURBOCHARGER ASSEMBLY INSTALLATION
1. Check the internal surface, the eye bolt and the
mating surface of the oil pipe and water pipe for
clogging, and clean if necessary.
2. If deposits of carbon are accumulated on the
turbocharger oil passage, remove them and clean
using the compressed air.
Caution
Be careful not to allow foreign material to enter the
turbocharger.
3. Add clean engine oil through the oil feed pipe port
on the turbocharger.
INSPECTION
Check the following points; replace the part if a problem is
found.
EXHAUST MANIFOLD CHECK
1. Check for damage or cracking of any part.
2. Using a straight edge and a thickness gauge, check for
distortion of the cylinder head installation surface.
Standard value: 0.15 mm or less
Limit: 0.20 mm
TURBOCHARGER ASSEMBLY CHECK
DVisually check the turbine wheel and the compressor
wheel for cracking or other damage.
DCheck whether the turbine wheel and the compressor
wheel can be easily turned by hand.
DCheck for oil leakage from the turbocharger assembly.
DCheck whether or not the waste gate valve remains open.
If any problem is found, replace the part after disassembly.
OIL PIPE AND OIL RETURN PIPE CHECK
Check the oil pipe and oil return pipe for clogging, bending,
or other damage. If there is clogging, clean it.
EXHAUST MANIFOLD CHECK
Damage or cracking of any part.


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AUTOMATIC TRANSMISSION -Troubleshooting 23-67
Ter-
minal
No.Standard value Inspection conditions Check item
10A/C compressor load signalA/C switch: OFF0V
A/C switch: ONSystem voltage
11Power supplyIgnition switch: OFF0V
Ignition switch: ONSystem voltage
12EarthAt all times0V
13EarthAt all times0V
14OD solenoid valveEngine: Idling
Shift range: 3rdSystem voltage
Engine: Idling
Shift range: Park7-9V
15DCC solenoid valveEngine: Idling
Shift range: 1stSystem voltage
162nd solenoid valveEngine: Idling
Shift range: 2ndSystem voltage
Engine: Idling
Shift range: Park7-9V
172nd shift indicator lampShift range: 2ndSystem voltage
Shift range: Other than the above0V
184th shift indicator lampShift range: 4thSystem voltage
Shift range: Other than the above0V
24Power supplyIgnition switch: OFF0V
Ignition switch: ONSystem voltage
25EarthAt all times0V
26EarthAt all times0V
31Input shaft speed sensorMeasure between terminals (31) and (43) using an
oscilloscope.
Engine: 2 000 r/min
Shift range: 4thCheck Procedure
using an Oscillo-
scope (Refer to
P.23-69.)
32Output shaft speed sensorMeasure between terminals (32) and (43) using an
oscilloscope.
Engine: 2 000 r/min
Shift range: 4thCheck Procedure
using an Oscillo-
scope (Refer to
P.23-69.)
33Engine speed sensorEngine: Idling2.0 - 2.4 V
38Backup power supplyAt all timesSystem voltage
43Sensor earthAt all times0V
44A/T fluid temperature sensorA/T fluid temperature 20°C3.8 - 4.0 V
A/T fluid temperature 40°C3.2 - 3.4 V
A/T fluid temperature 80°C1.7 - 1.9 V
45Accelerator pedal positionAccelerator pedal: Fully closed (engine stopped)0.985 - 1.085 V
sensor (APS)Accelerator pedal: Fully open (engine stopped)4.0 V or higher
51RED solenoid valveEngine: Idling
Shift range: 5thSystem voltage
Engine: Idling
Shift range: Park7-9V
53Output communication withEngine: IdlingOther than 0 V
engine-ECUSelector lever position: D


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55A-2
HEATER, AIR
CONDITIONER AND
VENTILATION

CONTENTS
SERVICE SPECIFICATIONS 3.................
LUBRICANTS 3..............................
TROUBLESHOOTING FRONT A/C> 4...............................
TROUBLESHOOTING REAR COOLER> 7...........................
ON-VEHICLE SERVICE 9.....................
Refrigerant Level Test through Performance Test 9.
Magnetic Clutch Test 10.........................
Receiver Drier Test 10..........................
Compressor Drive Belt Adjustment 10.............
Dual Pressure Switch Check 10..................
Charging 11...................................
Performance Test 15............................
Front Blower Relay and Rear Blower Relay
Continuity Check 18............................
Continuity Check of A/C Compressor Relay and
Condernser Fan Relay 18.......................
PTC Heater Relay Continuity Check 19...........
Idle-up Operation Check 19.............
Vacuum Actuator Check
20...................
Idle-up Solenoid Valve Check 21.................
Clean Air Filter Replacement Procedure 22........
FRONT A/C 23..............................
Air Conditioner Control Panel Assembly and
A/C Switch 23.................................
Heater Unit and Blower Assembly 26.............
Blower Motor and Resistor 29....................
Inside/Outside Air Changeover Damper Motor 30...
Automatic Compressor-ECU and
Air Thermo Sensor Assembly 31.................
REAR HEATER AND REAR COOLER 32.....
Rear A/C Switch, Front Rear Fan Switch 32.......
Rear A/C Control Unit 34........................
Rear Heater Unit 34............................
Rear Heater Unit and Rear Blower Assembly 37....
HEAT SWITCH 40...........................
COMPRESSOR 41...........................
CONDENSER ASSEMBLY AND
CONDENSER FAN 45........................
REFRIGERANT LINE 47.....................
ENGINE COOLANT TEMPERATURE SWITCH
51 ..........................................
IDLE-UP SYSTEM 53........................
DUCTS 54..................................
VENTILATION 56............................


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