MITSUBISHI 3000GT 1991 Service Manual

idAir Bag Module
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
- Disposal Procedures 52B-71
2.
19FO119Two wires
ConytionInsulation tape
13~075(8) At a location as far away from the vehicle as possible,
disconnect the two connected wires from each other,
and connect them to the two terminals of the battery
(removed from the vehicle) to deploy the air bag.
Caution
1.Before deploying the air bag in this manner, first
check to be sure that there is no one in or nearthe vehicle. Wear safety glasses.
2. The inflator will be quite hot immediately fol-
lowing the deployment, so wait at least 30
minutes to allow it to cool before attempting to
handle it.
Although not poisonous, do not inhale gas fromair bag deployment.
See Deployed Air Bag Module Disposal Proce-
dures
(P.52B-72) for post-deployment handling
instructions.
3.If the air bag fails to deploy when the procedures
above are followed, do not go near the module.Contact your regional Tech Line at 1-800-446-
6064 for instructions.
DEPLOYMENT OUTSIDE THE VEHICLE(1) Disconnect the negative
(4 and positive (+) battery
cables from the battery terminals, and then remove the
battery from the vehicle.
CautionWait at least 30 seconds after disconnecting the
battery cables before doing any further work. The
SRS system is designed to retain enough voltage todeploy the air bag for a short time even after the
battery has been disconnected, so serious injury
may result from unintended air bag deployment if
work is done on the SRS system immediately afterthe battery cables are disconnected.
(2) Remove the air bag module for the vehicle. (Refer toP.528-62.)
CautionThe air bag module should be stored on a flat
surface and placed so that the pad cover face up. Donot place anything on top of it.
(3) Connect two wires each six meters (20 feet) long, to
the two leads of SRS AIR BAG ADAPTER HARNESS B,
and cover the connections with insulation tape. The
other ends of the two wires should be connected to
each other (short-circuited), to prevent sudden unex-
pected deployment of the air bag.
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52B-72SUPPLEMENTAL RESTRAINT SYSTEM (SRS) - &%~~~~~ures(4) Place the air bag module, with the pad cover face up, in
a flat, spacious area at least 6 meters (20 feet) away
from any people, equipment or other objects. Connect
SRS AIR BAG ADAPTER HARNESS B to the air bag
mdmodule connector on the module’s underside.
(5) At a location as far away from the air bag module as
possible, and from a shielded position, if possible,
disconnect the two connected wires from each other
and connect them to the two terminals of the battery
(removed from the vehicle) to deploy the air bag.
Caution1. Do not perform deployment outside, if a strong
wind is blowing, and if there is even a slight
breeze, the air bag module should be placed anddeployed downwind from the battery.
2. Before deployment, check carefully to be sure
that no one is nearby, because deployment will
cause the air bag module to jump upward about
1.5 to 3 meters (about 5 to 10 feet) into the air.3. The inflator will be quite hot immediately fol-
lowing deployment, so wait at least 30 minutes
to allow it to cool before attempting to handle it.
Although not poisonous, do not inhale gas fromair bag deployment. See Deployed Air Bag
Module Disposal Procedures (as shown below)for post-deployment handling instructions.
4. If the air bag module fails to deploy when the
procedures above are followed, do not go near
the module. Contact your regional Tech Line at
l-800-446-6064 for instructions.\J’
DEPLOYED AIR BAG MODULE DISPOSAL PROCE-
DURESAfter deployment, the air bag module should be placed in a
plastic bag and disposed of in the same manner as any other
scrap parts, except that the following points should be carefully
noted during disposal.
(1) The inflator will be quite hot immediately following deploy-
ment, so wait at least 30 minutes to allow it to cool before
attempting to handle it.
(2) Do not put water or oil on the air bag after deployment.
(3) There may be, adhered to the deployed air bag module,
material that could irritate the eyes and/or skin, so wear
gloves and safety glasses when handling a deployed air bag
module. IF DESPITE THESE PRECAUTIONS, THE MATE-
RIAL DOES, GET INTO THE EYES OR ON THE SKIN,
IMMEDIATELY RINSE THE AFFECTED AREA WITH A
LARGE AMOUNT OF CLEAN WATER.
IF ANY IRRITATION DEVELOPS, SEEK MEDICAL
A-I-TEN-TION.
(4) Put the deployed air bag in a hermetically sealed container
and discarded it.
‘LJ i
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55-1
HEATER, AIR
CONDITIONER
AND VENTILATION
CONTENTSM55AA- -
HEATERS AND AIR CONDITIONING................3HEATER UNIT*........................................................................22
SPECIFICATIONS
....................................................................3REFRIGERANT LINE................................................................35General Specifications
........................................................3RESISTOR................................................................................20Lubricants
............................................................................4SAFETY PRECAUTIONS........................................................9Sealant and Adhesive............................................................4
Service Specifications3SERVICE ADJUSTMENT PROCEDURES............................10........................................................
SPECIAL TOOLS4Charging Procedures............................................................11
i
........................................................................Charging the Refrigerant....................................................12Compressor Drive Belt Adjustment....................................11
HEATERS AND MANUAL AIR CONDITIONER5Compressor Noise................................................................16
................................................16
AIR CONDITIONER SWITCH................................................21Handling Tubing andFittings
Idle-up Operation Check....................................................17
BELT LOCK CONTROLLER20Performance Test................................................................15....................................................
BLOWER ASSEMBLYPower Relay Check............................................................17............................................................23Refrigerant Leak Repair Procedure....................................15COMPRESSOR........................................................................
27TestProcedures....................................................................10
CONDENSER AND CONDENSER FAN MOTOR................33TROUBLESHOOTING............................................................5
ENGINE COOLANT TEMPERATURE SWITCH....................
39VENTILATORS (AIR INLET AND AIR OUTLET)................38
EVAPORATOR
........................................................................
25VENTILATORS (INSTRUMENT PANEL)*............................36
HEATER CONTROL ASSEMBLY*
........................................18CONTINUED ON NEXT PAGE
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
(1)A Supplemental Restraint System (SRS), which uses a driver-side air bag, has been installed in the 3000GT.(2)The SRS includes the following components: impact sensors, SRS diagnosis unit: SRS warning light, air bagmodule, clock spring, interconnecting wiring. Other SRS-related components (that may have to be
removed/installed in connection with SRS service or maintenance) are indicated in the table of contents byan asterisk (*).
WARNING!(1)Improper service or maintenance of any component of the SRS, or any SRS-related component, can lead to
personal injury or death to service personnel (from inadvertent firing of the air bag) or to the driver (fromrendering the
SRS inoperative).(2) Service or maintenance of any SRS component or SRS-related component must be performed only at anauthorized MITSUBISHI dealer.
(3) MITSUBISHI dealer personnel must thoroughly review this manual, and especially its GROUP 52B
-Supplemental Restraint System (SRS), before beginning any service or maintenance of any component of theSRS or any SRS-related component.

55-2FULL AUTO AIR CONDITIONER........................40OTHER PARTS........................................................................62
AIR-CONDITIONER CONTROL PANEL*,POWER TRANSISTOR, BELT LOCK CONTROLLER........57
AIR-CONDITIONER CONTROL UNIT*................................56
REFRIGERANT LINE................................................................62
COMPRESSOR
........................................................................62SAFETY PRECAUTlONS........................................................56
CONDENSER AND CONDENSER FAN MOTOR
................
62SENSORS....................................................................................60
DAMPER CONTROL MOTOR ASSEMBLY*........................
58SERVICE ADJUSTMENT PROCEDURES............................56
ENGINE COOLANT TEMPERATURE SWITCH
....................62
TROUBLESHOOTING............................................................40

HEATER, AIR CONDITIONER AND VENTILATION - Specifications55-3
HEATER, AIR CONDITIONER AND VENTILATION
LSPECIFICATIONSM55CA. -
/’
L;
GENERAL SPECIFICATIONS
Items
Heater unit
Type
Heater control assembly
Compressor
Model
Refrigerant unit lubricant
cc (cu.in.1
V belt sizemm (in.)
Dual pressure switch
High pressure switch
kPa (psi)
Low pressure switchkPa (psi)
Freezer prevention
“C (“F)
Refrigerant and quantityg (oz.)
Specifications
Three-way-flow full-air-mix system
Dial type
Scroll type (FX-105 VS)
FREOL S-83 or SUNISO 5GS160 & 20 (9.8 + 1.2)
1,150 (45.3)
OFF: 2,700 (384)ON: 2,100 (299)
OFF: 210 (30)
ON
: 235 (33)
Air temperature thermostatOFF: - 2 (28.4)
ON: 2 (35.6)
R-l 2Approx. 970 (34)
SERVICE SPECIFICATIONSM55CB. -
Items
Standard value
Idle speed when air conditioner onrpm
Resister resistance value1R
Refrigerant temperature sensor
Sensor-ON temperature
“C (“F)
Sensor-OFF temperature“C (“F)
Revolution pick up sensor standard resistance 0
Clutch clearancemm (in.)
Engine coolant temperature switch
Switch-OFF temperature
“C (“F)
<Fully automatic air conditioner>
Air mix damper potentiometer motor assembly resistanceMAX. HOT
kQMAX. COOL
kS1
Outlet selector damper potentiometer assembly resistanceDEF. position
kS1FACE position
kfl
Water temperature sensor
Sensor-ON temperature
“C (“F)
Specifications
900
f 100 CA/T at P range>
1.76
- 2.06 (Across terminals @and 0)
1 .I 0 - 1.26 (Across terminals @and 0)
0.38 - 0.44 (Across terminals @and @)
Approx. 110 (230) or less
Approx. 155 (311) or more
405
f 35 when ambient temperature is 20°C (68°F)
0.4 - 0.6 (.Ol - .02)
112-118(233-244)
0.2
4.9
2.0
4.3
26.5 f 4 (79.7 + 7)
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55-4 HEATER, AIR CONDITIONER AND VENTILATION -Specifications / Special Tools
LUBRICANTSM55CD. _
ItemsSpecified lubricants
Each connection of refrigerant lineFREOL S-83 or
SUNISO 5GS
Quantity
As required
SEALANT AND ADHESIVEM55CE- -
IItemsSpecified sealant and adhesiveI
Engine coolant temperature switch threaded part3M Nut Locking Part No. 4171 or equivalent
SPECIAL TOOLSMSSDA- -
multi-use tester)
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HEATERS AND MANUAL AIR CONDITIONER - Troubleshooting55-5
HEATERS AND MANUAL AIR CONDITIONER
t+-/ TROUBLESHOOTING
L
M55ECAE
Symptom
Heater insufficientheatProbable cause
Obstructed heater outlets
Blend air dampers improperly adjusted or binding
Thermostat malfunction
Obstructed heater hoses
Remedy
Correct
Replace
No ventilation evenwhen mode selectionknob is operatedImproperly adjusted control cables
Plugged or partially plugged heater core
Incorrect adjustment of mode selection dampersIncorrect installation of mode selection controlwire
Ducts are incorrectly/incompletely connected,crushed, bent or clogged
Burnt-out fuse
Poor grounding
Malfunction blower switch
Malfunction resistorAdjust
Clean or replace
Adjust
Blower motor
inoperative
Repair or replace
ReplaceCorrect
Replace
Malfunction blower motor
Malfunction heater relay
Malfunction blower motor relay
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55-6HEATERS AND MANUAL AIR CONDITIONER - Troubleshooting
CIRCUIT DAIGRAM
P\IR CONDITIONER CONTROL UNIT CIRCUIT
1 Batte
( Alternator k
2-Jl-
-use
Fuse
-yq
L-l
Fuse
vi ~~o~~;motor ;?IResistor;
r---HI---MH:---ML---I n
IIHeater control panelI-
fI.IAir conditioner switch
1
Air conditioner control unit
A/CI
Regulator
IT
If
I
1II
1 IFin therm0 sensorAir inlet sensor
I” ”I\
Revolution pick up sensori
Compressor
@IDY
vi;
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2OFOO43
I

L
2OFOO85HEATERS AND MANUAL AIR CONDITIONER
- Trqubleshooting55-7
TROUBLESHOOTING HINTSInspection of Air Conditioner Control Unit
Disconnect the amplifier and inspect the connector on the wire
harness side as shown in the chart below.
Test Conditions:
(1) Ignition switch: ON
(2) Air conditioner switch: ON
(3) Temperature control lever: MAX. COOL
(4) Blower switch: HI
1 Terrrnal 1Signal
Conditions
8Auto compressor control unit groundAt all timesov
1Auto compressor control unit power
SUPPlY
When ignition switch is ON
Battery
voltage
6Air conditioner compressor relay
When all conditions for switch-ON of
Battery
the compressor are satisfiedvoltage
I ’I
Air conditioner switch: A/C
When air conditioner switch pressed inBattery
to second stepvoltage
Air conditioner switch: ECONO
When air conditioner switch pressed in
to first step
13Fin-therm0 sensor 0Ignition switch, blower switch and airApprox.
conditioner switch: ON2.5V/
LJ14Air-inlet sensor 0Ignition switch, blower switch and air
conditioner switch: ONApprox.IV
15Fin-therm0 sensor 0Ignition switch, blower switch and air
conditioner switch: ON
Ambient temperature: 4°C (39°F)
OV
18Air-inlet sensor 0Ignition switch, blower switch and air
conditioner switch: ON
Ambient temperature: 4°C (39°F)ov
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55-8HEATERS AND MANUAL AIR CONDITIONER - Troubleshooting
TROUBLESHOOTING QUICK-REFERENCE TABLE
Compressor doesn’t operate.
hen
no.
4
5
6
7
8
9
-
I
I
/
L
switch terminals.
Sensor
”
1
InspectronCriteriapointIMethodProbable causeIRemedy
Abnormal
No sound is
notedFaulty magnetic clutchReplace magnetic clutch.
No continuity
Faulty blower switchReplace blower switch
No continuity
Faulty air conditioner
switchReplace air conditioner
switch.
No continuity
Faulty air magnetic clutch
relayReplace magnetic clutch
relay.
pa;?’ places where gas
II
Vo continuityFaulty dual-pressure switchReplace dual-pressure
\Jo continuityIFaulty thermostatswitch.Replace thermostat.
Outside range of3.9 to 4.1 kfiFaulty fin-therm0 sensorReplace fin-therm0 sensor
3utside range ofFaulty air inlet sensor1.9tol.l kQReplace air inlet sensor.
If no abnormality
is noted at each inspection point after inspection coducted in the sequence shown in this quick-reference table, it is suspected that
the compressor IS Inoperative because of faulty air conditioner control unit. Therefore, replace the air conditioner control unit.
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