2000 MITSUBISHI MONTERO Service Repair Manual

C
heck it e m s C
heckin g re quir e m ents N
orm alco ndit io n 1 B
atte ry pow er su pply (fo r m oto r) A
lw ays S
yste m vo lt a ge 2 I
g nit io n sw it c h (IG 2) pow er su pply I
g nit io n sw it c h : O N S
yste m vo lt a ge 3 B
atte ry pow er su pply (fo r E C U) A
lw ays S
yste m vo lt a ge 5 G
ro und A
lw ays 0
V 6 S
unro ofs w it c h (C LO SE/D O W N)sig nal
i n put S
unro of sw it c h :C LO SE/D O W N 0
V 7 S
unro of sw it c h (U P)sig nalin put S
unro of sw it c h : U P 0
V 8 S
unro of sw it c h (O PEN )sig nalin put S
unro of sw it c h : O PEN 0
V 6 S
W S co m munic a tio n lin e A
lw ays 0
-12 V (p uls e
s ig nal)

SWS -On-vehicle Service54B-60
ON-VEHICLE SERVICE
ADJUSTMENT PROCEDURES OF SWS FUNCTION
Through special operation of input switches, it is possible to disable and enable the functions listed below.
Settings are retained even if the battery is disconnected.
DKeyless entry hazard answerback function
DInitialization of above mentioned functions
Configuration Mode Entry Conditions
1. Set each switch at the following condition.
DHazard warning lamp switch: OFF
DDiagnosis control: ON (MUT-II
connected or terminal 1 of diagnosis connector connected to earth)
DKey reminder switch: OFF (ignition key inserted)
DIgnition switch: LOCK (OFF)
DDriver’s door switch: OFF (driver’s door closed)
2. When the windshield washer switch is continuously turned ON for more than 10 seconds, the buzzer
integrated in the ETACS-ECU sounds once and the mode is switched to the configuration mode.
Configuration Mode Cancellation Conditions
The ETACS-ECU cancels the configuration mode when any of the conditions listed below is satisfied.
DDiagnosis control: OFF (MUT-II
disconnected or terminal 1 of diagnosis connector disconnected from
earth)
DKey reminder switch: ON (ignition key removed)
DIgnition switch: any position other than LOCK (OFF)
DDriver’s door switch: ON (driver’s door open)
DNo configuration performed within three minutes of entry to configuration mode (If configuration is
performed within first three minutes, monitoring continues for three minutes from that point.)
Configuration of Functions
FunctionConfiguration procedure
Keyless entry hazard
answerbackIf the transmitter’s LOCK switch is turned ON twice within two seconds, the lock answerback
function’s enabled/disabled status is inverted.
D
When function is enabled, buzzer sounds once (initial status).
D
When function is disabled, buzzer sounds twice.
If the transmitter’s UNLOCK switch is turned ON twice within two seconds, the unlock
answerback function’s enabled/disabled status is inverted.
D
When function is enabled, buzzer sounds once (initial status).
D
When function is disabled, buzzer sounds twice.
Initialization of above
mentioned functionsIf the windshield washer switch is turned ON for more than 20 seconds, the buzzer sounds
twice and all functions are initialized. (The configuration mode entry buzzer sounds after 10
seconds, but the switch must be kept ON for 20 seconds to achieve initialization.)
IF the windshield washer switch ins kept ON for more than 20 seconds without prior entry
of the configuration mode, the configuration mode is entered after 10 seconds and
initialization does not take place.


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HEATER, AIR
CONDITIONER AND
VENTILATION

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


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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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HEATER, AIR CONDITIONER AND VENTILATION - Service Specifications/Lubricants55A-3
SERVICE SPECIFICATIONS
ItemStandard value
Idle speed r/minDiesel4D56750±100
(N or P range)4M41750±50
Idle-up speed r/min4D56925±25
(N or P range)4M41A/CWhen the
A/C is under
low or me-
dium load800±50
When the1,000±50
A/C is under
high load
Water temperature switch_CA/C cut-offON108
OFF11 5
Condenser fanOFF97
ON102
Resistor resistance (Front A/C)WBetween terminals 2 and 40.39±7%
Between terminals 1 and 21.49±7%
Between terminals 2 and 32.79±7%
Resistance of the rear air conditioner switch (temperature control switch) kW
0-3
Potentiometer for air mix damper kW1.2 - 4.8
Resistor resistance [Rear heater (frontBetween terminals 1 and 64.9±7%
console)]WBetween terminals 1 and 31.25±7%
Resistor resistance [Rear heater (quarterBetween terminals 1 and 64.9±7%
trim), rear heater]WBetween terminals 1 and 31.25±7%
Idle-up solenoid valve resistanceW40
Air compressor air gap mm0.35 - 0.65
LUBRICANTS
ItemSpecified lubricantsQuantity
Compressor oil mLExcept for vehicles with rear coolerDENSO OIL 8120±20
Vehicles with rear coolerDENSO OIL 8140±20
Pipe connectionsDENSO OIL 8As required
Refrigerant gExcept for vehicles with rear coolerR134a (HFC-134a)500±20
Vehicles with rear coolerR134a (HFC-134a)780±20


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HEATER, AIR CONDITIONER AND VENTILATION - Troubleshooting55A-4
TROUBLESHOOTING
Trouble symp-
tomProbable causeRemedyRefer-
ence
page
The air condi-Malfunction of fuseReplace the fuse.–
tioner does notMalfunction of harness or connectorRepair the harness or connector.–work.
Refrigerant leak or overfilling of refrigerantReplenish the refrigerant, repair the leak
or take out some of the refrigerant.–
A/C compressor relay is defective.Replace the A/C compressor relay.55A-18
The A/C compressor magnetic clutch is
defective.Replace the A/C compressor.55A-10
The dual pressure switch is defective.Replace the dual-pressure switch.55A-10
The A/C switch is defective.Replace the heater control assembly.55A-24
The blower switch is defective.Replace the heater control assembly.55A-24
The air thermo sensor is defective.Replace the automatic compressor-ECU
and the air thermo sensor assembly.55A-31
The automatic compressor-ECU is defec-
tive.Replace the automatic compressor-ECU
and the air thermo sensor assembly.55A-6
The engine-ECU is defective.Replace the engine-ECU.–
When the A/C
is operating,Refrigerant leakReplenish the refrigerant and repair the
leak.–
temperature
inside the pas-The dual pressure switch is defective.Replace the dual-pressure switch.55A-10inside the pas-
senger
The condenser fan relay is defective.Replace the condenser fan relay.55A-18compartment
doesn’t de-
A/C compressor relay is defective.Replace the A/C compressor relay.55A-18
crease (cool
air is not
emitted).The A/C compressor magnetic clutch is
defective.Replace the A/C compressor.55A-10
When the A/C
is operating,
temperature
inside the pas-
senger
compartment
doesn’t in-
crease (warm
air is not
emitted).Malfunction of the air thermo sensorReplace the automatic compressor-ECU
and the air thermo sensor assembly.55A-31
The blowerMalfunction of fuseReplace the fuse.–
motor does notMalfunction of harness or connectorRepair the harness or connector.–run.
The blower relay is defective.Replace the blower relay.55A-18
The blower motor is defective.Replace the blower motor.55A-29
The blower switch is defective.Replace the heater control assembly.55A-24
Malfunction of the resistorReplace the resistor.55A-29
The automatic compressor-ECU is defec-
tive.Replace the automatic compressor-ECU
and the air thermo sensor assembly.55A-6


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T
he blo w er M
alf u nctio n of fu se R
epla ce th e fu se . –
m
oto rd oes not M
alf u nctio n of harn ess or co nnecto r R
epair th e harn ess or co nnecto r. –
s
to p ru nnin g. T
he blo w er sw it c h is defe ctiv e . R
epla ce th e blo w er sw it c h asse m bly . 5
5A -2 4 M
alf u nctio n of th e re sis to r R
epla ce th e re sis to r. 5
5A -2 9 T
he auto m atic co m pre sso r-E C U is defe c-
t iv e . R
epla ce th e auto m atic co m pre sso r-E C U
a nd th e air th erm ose nso r asse m bly . 5
5A -6 T
he in sid e/o ut- M
alf u nctio n of fu se R
epla ce th e fu se . –
s
id e air M
alf u nctio n of harn ess or co nnecto r R
epair th e harn ess or co nnecto r. –
c
h angeove r is
i m possib le . M
alf u nctio n of th e in sid e/o uts id e air
c h angeove r dam per m oto r C
heck th e in sid e/o uts id e air ch angeove r
d am per m oto r. 5
5A -3 0 T
he auto m atic co m pre sso r-E C U is defe c-
t iv e . R
epla ce th e auto m atic co m pre sso r-E C U
a nd th e air th erm ose nso r asse m bly . 5
5A -6 C
heck it e m C
heck co ndit io ns N
orm alco ndit io n 7 I
n putfr o m th e co ndense r fa n re la y (H I) W
hen th e co ndense r fa n sto pped 0
V W
hen th e co ndense r fa n is opera tin g S
yste m vo lt a ge 2
1 I
n putfr o m th e A/C co m pre sso r re la y W
hen th e A/C is off . 0
V W
hen th e A/C is in opera tio n
( W hen th e co m pre sso r is opera tin g) S
yste m vo lt a ge 3
2 I
n putfr o m dualp re ssu re sw it c h D
ual- p re ssu re sw it c h : O FF 0
V D
ual- p re ssu re sw it c h : O N S
yste m vo lt a ge 3
3 A
uto m atic co m pre sso r-E C U – –

C
heck it e m C
heck co ndit io ns N
orm al
c o ndit io n 2 A
uto m atic co m pre sso r-E C U
< 4M 41> – –
3 E
arth A
tall tim es C
ontin uit y 4 O
utp ut to th e dual- p re ssu re sw it c h D
ual- p re ssu re sw it c h : O FF 0
V D
ual- p re ssu re sw it c h : O N S
yste m
v o lt a ge 5 I
n putfr o m th e A/C sw it c h B
lo w er sw it c h : LO A
/C sw it c h :O FF 0
V A
/C sw it c h :O N S
yste m
v o lt a ge