light MITSUBISHI 3000GT 1991 Service Manual

52B-68SUPPLEMENTAL RESTRAINT SYSTEM (SRS) - %%%$kgSRS warning
light
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19FOO722. INSTALLATION OF AIR BAG MODULE
(1) Arrange the wiring of the horn switch as shown in the
figure at the left, and hook up in place.
(2) Install the air bag module, taking care that no wiring is
vicaught by it.
POST-INSTALLATION INSPECTION(1) After installing the clock spring, the steering wheel, the
column covers and the air bag module, check steering
wheel for noise, binds or difficult operation.
(2) Reconnect the negative battery terminal. Turn the ignition
switch to “ON”. Does the “SRS” warning light illuminate
for about 7 seconds, turn OFF and then remain extin-
guished for at least 45 seconds? If yes, SRS system is
functioning properly. If no, consult page
52B-17.
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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.
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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
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........................................................................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.

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HEATERS AND MANUAL AIR CONDITIONER -Service Adjustment Procedures 55 15
PERFORMANCE TESTM55FWAH
(I) Park the tested vehicle at the area which is not exposed to
the direct sunlight.
(2) Connect a tachometer.
(3) Turn back the adaptor valve handle all the way and install
the adaptor valves to the high pressure and low pressure
service valves.
(4) Connect the gauge manifold to the adaptor valves.
(5) Tighten the adaptor valve handle and open the service
valves.
(6) Start the engine.
(7) Set the controls to the air conditioner as follows:
Air conditioning switch: Air conditioner
- ON position
Mode selection: Face position
Temperature control: MAX. COOL position
Air selection: Recirculation position
Blower switch: HI (Fast) position
(8) Adjust engine speed to 1,000 rpm with air conditioner
clutch engaged.
(9) Engine should be warmed up with doors, windows close,
and hood open.
(1O)lnsert a thermometer in the center air conditioner outlet and
operate the engine for 20 minutes.
(II )Note the discharge air temperature.
NOTEIf the clutch cycles, take the reading before the clutch
disengages.
Performance Temperature ChartGarage
amb;in,L;am-perature21 (70)
26.7 (80)32.2 (90)37.8 (100)43.3 (110)
Iperature Dischargeair "C tem- ("F)(32.0 0.0- -3.0 37.4)(33.8 1.0- -4.0 39.2)(33.8 1.0- -4.0 39.2)(33.8 1.0- -4.0 39.2)(35.6 2.0- -41.0) 5.0
ICompressor pressure kPa discharge (psi)(98.1 690- -105.3) 740(110.9 780- -830 118.1)(123.7 870- -920 130.9)(153.6 1,080- -1,130 160.7)(172.1 1,210- -1,260 179.2)Compressor suction130
-190130-190130-190130-190130-190
pressure kPa (psi)(18.5-27.5)(18.5-27.5)(18.5-27.5)(18.5-27.5)(18.5-27.5)
REFRIGERANT LEAK REPAIR PROCEDUREM55FHAQ
LOST CHARGEIf the system has lost all charge due to a leak:
(1) Evacuate the system. (See procedure.)
(2) Charge the system with approximately one pound of
refrigerant.
(3) Check for leaks.
(4) Discharge the system.
(5) Repair leaks.
(6) Replace receiver drier.
Caution
Replacement filter-drier units must be sealed while instorage. The drier used in these units will saturate
water quickly upon exposure to the atmosphere. When
installing a drier, have all tools and supplies ready forquick reassembly to avoid keeping the system open
any longer than necessary.(7) Evacuate and charge the system.
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HEATERS AND MANUAL AIR CbNDlTlONER -Service Adjustment Procedures 55 17
ADJUSTMENT PROCEDURES(1) Select a quiet area for testing. Duplicate conditions as much
as possible. Switch compressor on and off several times to
clearly identify compressor noise.
To duplicate high ambient conditions (high head pressure),
restrict air flow through condenser. Install manifold gauge
set to make sure discharge pressure doesn’t exceed 2,070
kPa (300 psi).
(2) Tighten all compressor mounting bolts, clutch mounting
bolt, and compressor drive belt. Check to assure clutch coil
is tight (no rotation or wobble).
(3) Check refrigerant hoses for rubbing or interference that can
cause unusual noises.
(4) Check refrigerant charge. (See “Charging System”.)
(5) Recheck compressor noise as in Step 1.
(6) If noise still exists, loosen compressor mounting bolts and
retorque. Repeat Step 1.
(7) If noise continues, replace compressor and repeat Step 1.
POWER RELAY CHECKMBBFNAK(1) Remove the radiator fan motor relays (HI) and (LO) from the
relay box on the right of the engine compartment.
(2) Remove the radiator fan motor relay (air conditioner),
condenser fan motor relays (HI) and (LO), and
air-conditioner compressor relay from the relay box on the left
of the engine compartment.
(3) Remove the blower motor relay from the junction box.
(4) Remove the blower motor HI relay from the blower case
assembly.
(5) Check the continuity between terminals using a circuit
tester.
J Blower m.otor HI relay\2OFOO6l
IDLE-UP OPERATION CHECKM55FOAB
(1) Before inspection and adjustment set vehicle in the
following condition:
lEngine coolant temperature: 80 - 95°C (176 - 203°F)
lLights, electric cooling fan and accessories: Set to OFF
l Transaxle: Neutral (N or P for vehicles with
A/T)l Steering wheel: Straightforward
(2) Check to be sure that the idling speed becomes the
standard value when the air conditioner switch is switched
ON and the air conditioner is activated.
Standard value: 900
+ 100 rpm
NOTEThere is no necessity to make an adjustment, because the
idling speed is automatically adjusted by the ISC” system.
If, however, there occurs a deviation from the standard
value for some reason, check the ISC” system.
ISC: Idle Speed Control
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HEATERS AND MANUAL AIR CONDITIONER - Air Condikner Switch55-21
AIR CONDITIONER SWITCH
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REMOVAL AND INSTALLATIONRemoval steps
1. Center air outlet assembly
2. Air conditioner switch
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M55QA- *
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SERVICE POINTS OF REMOVALM55QBAH1. REMOVAL OF CENTER AIR OUTLET ASSEMBLY
Disengaging the clips (2 positions) of the center air outlet
assembly with a flat tip screwdriver, remove the center airoutlet assembly with the trim stick.
2. REMOVAL OF AIR CONDITIONER SWITCH
Remove the center air outlet assembly, and insert hand tothe back of the cluster panel assembly through the
produced opening. Push it toward you for removal.
INSPECTION
AIR CONDITIONER SWITCH CHECKM55QCAD
OFF.
0
light
If pressed 1 step (ECONOMY)
If pressed 2 steps(Air conditioner)
NOTE(1) The O-O symbol indicates continuity(2) *: 20A018ITSB Revision