MITSUBISHI MONTERO 2000 Service Repair Manual

SWS -Troubleshooting54B-55
Terminal
No.Normal condition Checking requirements Check items
26Key reminder switch signal inputKey reminder switch: ON (Ignition key
removed)0V
27Hazard warning lamp switch signal
inputHazard warning lamp switch: ON0V
29Recognition line of daytime running
lamp (DRL) <Vehicles with DRL>Always0V
31Data request signal outputAlways0 - 5 V (pulse
signal)
34Windshield intermittent wiper interval
adjusting knob signal inputIgnition switch: ACC,
Windshield intermittent wiper interval
adjusting knob: FAST®SLOW0®2.5 V
35Back-up lamp switch signal input
<M/T>Ignition switch: ON,
Shift lever: RSystem voltage
Inhibitor switch (reverse) signal input
<A/T>Ignition switch: ON,
Selector lever: RSystem voltage
36Ignition key hole illumination lamp
outputWhen ignition key hole illumination
lamp is lighted2 V or less
37Diagnosis code or input signal check
outputWhen diagnosis code is output0 - 12 V (pulse
signal)
When input signal check is output0, 12 V (When input
pulse signal is
changed)
40Rear fog lamp relay outputWhen rear fog lamp is lighted2 V or less
53Front passenger’s and back door lock
key cylinder switch (LOCK) signal inputFront passenger’s or back door lock key
cylinder switch: LOCK0V
54Front passenger’s and back door lock
key cylinder switch (UNLOCK) signal
inputFront passenger’s or back door lock
switch: UNLOCK0V
55Driver’s door lock actuator switch
(LOCK) signal inputDriver’s door lock actuator switch:
LOCK0V
56Driver’s door lock actuator switch
(UNLOCK) signal inputDriver’s door lock actuator switch:
UNLCOK0V


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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 A
lw ays S
yste m vo lt a ge 2 D
ata re quest sig nalin put A
lw ays 0
-12 V (p uls e
s ig nal) 3 S
W S co m munic a tio n lin e A
lw ays 0
-5 V (p uls e
s ig nal) 4 G
ro und A
lw ays 0
V 6 W
in dsh ie ld in te rm it te nt wip er in te rv a l
a dju stin g kn ob sig nalo utp ut I
g nit io n sw it c h : A C C,
W in dsh ie ld in te rm it te nt wip er in te rv a l
a dju stin g kn ob:F A ST ® SLO W 0
® 2.5 V 8 W
in dsh ie ld wip er sw it c h backu p outp ut W
in dsh ie ld lo w -s p eed wip er sw it c h or
w in dsh ie ld hig h-s e ed wip er sw it c h :O N 0
V 9 I
g nit io n sw it c h (IG 1) pow er su pply I
g nit io n sw it c h : O N S
yste m vo lt a ge 1
0 H
eadla m p sw it c h backu p outp ut H
eadla m p sw it c h : O N 0
V C
heck it e m s C
heckin g re quir e m ents N
orm alco ndit io n 1 F
ro nt fo g la m p re la y outp ut W
hen fr o nt fo g la m p is lig hte d 2
V or le ss 2 H
eadla m p (h ig h-b eam )outp ut W
hen headla m p(h ig h-b eam )is lig hte d S
yste m vo lt a ge 3
, 4 B
atte ry pow er su pply (fo r headla m p) A
lw ays S
yste m vo lt a ge 5 B
atte ry pow er su pply (fo r ta il la m p) A
lw ays S
yste m vo lt a ge 6 H
eadla m p (lo w -b eam )outp ut W
hen headla m p (lo w -b eam )is lig hte d S
yste m vo lt a ge 7 B
atte ry pow er su pply (fo r E C U) A
lw ays S
yste m vo lt a ge 8 T
a il la m p outp ut W
hen ta il la m p is lig hte d S
yste m vo lt a ge 9 B
atte ry pow er su pply (fo r headla m p
w ash er) A
lw ays S
yste m vo lt a ge 1
1 H
eadla m p wash er outp ut W
hen headla m p wash er is opera te d S
yste m vo lt a ge 2
1 W
in dsh ie ld wash er outp ut W
hen win dsh ie ld wash er is opera te d S
yste m vo lt a ge

2
2 S
W S co m munic a tio n lin e A
lw ays 0
-12 V (p uls e
s ig nal) 2
3 W
in dsh ie ld wip era uto -s to p sig nalin put W
hen win dsh ie ld wip er is opera te d S
yste m vo lt a ge 2
4 I
g nit io n sw it c h (A C C)pow er su pply I
g nit io n sw it c h : A C C S
yste m vo lt a ge 2
5 H
eadla m p sw it c h backu p in put H
eadla m p sw it c h : O N 0
V 2
6 W
in dsh ie ld wip er backu p in put W
in dsh ie ld lo w -s p eed wip er sw it c h or
w in dsh ie ld hig h-s p eed wip er sw it c h :
O N 0
V 2
7 W
in dsh ie ld wip er (lo w -s p eed) outp ut W
hen win dsh ie ld wip er is opera te d (a t
l o w -s p eed) S
yste m vo lt a ge 2
8 W
in dsh ie ld wip er (h ig h-s p eed) outp ut W
hen win dsh ie ld wip er is opera te d (a t
h ig h-s p eed) S
yste m vo lt a ge 3
0 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
1 G
ro und A
lw ays 0
V C
heck it e m s C
heckin g re quir e m ents N
orm alco ndit io n 1 P
ow er su pply P
ow er w in dow re la y: O N S
yste m vo lt a ge 3 S
W Sco m munic a tio n lin e (b etw een th e
m ain sw it c h and th e pow er win dow
m oto r) P
ow er w in dow re la y: O N 0
-12 V (p uls e
s ig nal) 4 S
W Sco m munic a tio n lin e (b etw een th e
m ain sw it c h and th e ETA C S-E C U) A
lw ays 0
-12 V (p uls e
s ig nal) 5 G
ro und A
lw ays 0
V

C
heck it e m s C
heckin g re quir e m ents N
orm alco ndit io n 1 S
W Sco m munic a tio n lin e (b etw een th e
m ain sw it c h and th e pow er win dow
m oto r) P
ow er w in dow re la y: O N 0
-12 V (p uls e
s ig nal) 3 G
ro und A
lw ays 0
V 5 P
ow er su pply P
ow er w in dow re la y: O N S
yste m vo lt a ge 7 S
W Sco m munic a tio n lin e (b etw een th e
m ain sw it c h and th e ETA C S-E C U) A
lw ays 0
-12 V (p uls e
s ig nal) C
heck it e m s C
heckin g re quir e m ents N
orm alco ndit io n 1 G
ro und A
lw ays 0
V 2 P
ow er win dow su b sw it c h (D O W N)
s ig nalin put < E xce pt driv e r’s door> P
ow er w in dow su b sw it c h : D O W N 0
V 3 P
ow er su pply P
ow er w in dow re la y: O N S
yste m vo lt a ge 4 P
ow er w in dow su b sw it c h (U P) sig nal
i n put < E xce pt driv e r’s door> P
ow er w in dow su b sw it c h : U P 0
V 6 S
W Sco m munic a tio n lin e (b etw een th e
p ow er main sw it c h and th e pow er
w in dow moto r) P
ow er w in dow re la y: O N 0
-12 V (p uls e
s ig nal)

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
<MANUAL A/C>
Click on the applicable bookmark to selected the required model year.


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55A-2
HEATER, AIR
CONDITIONER AND
VENTILATION
<MANUAL A/C>
CONTENTS
SERVICE SPECIFICATIONS 3.................
LUBRICANTS 3..............................
TROUBLESHOOTING <FRONT HEATER,
FRONT A/C> 4...............................
TROUBLESHOOTING <REAR HEATER,
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 <Diesel> 19.............
Vacuum Actuator Check
<Diesel-powered vehicles> 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
<except rear heater (floor console)>0-3
Potentiometer for air mix damper kW<Rear heater>1.2 - 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 <Front heater, Front A/C>
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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