radiator MITSUBISHI 3000GT 1991 Owner's Manual

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 - ::“dE:; and Condenser55-33
CONDENSER AND CONDENSER FAN MOTOR
MFSTA-A
idREMOVAL AND
IlilSTALLATlONPre-removal and Post-installation
l Discharge and Charging of the Refrigerant
l Removal and lnsiallation of the Alternator(Refey to GROUP 16 -Alternator.)
6
f: Piplng connection
@
20N00890-ring
d-ringCompressor oil: Freol S-83 or Suniso 5GS
9-11 Nm
7.0 - 8.0 ftlbs.
9’23’Nm17 ft.lbs.
asset-rRemoval steps1. Condenser fan motor
2. Fan
3. Motor assembly
4. Shroud
w w 5. Radiator fan motor assembly(Refer to GROUP 14- Radiator.)
Insulator installationbolts
6.4*7. Liquid pipe A and liquid pipe Bl *8. Condenser9.Bushings
/9.0 7.0ft.lbs. Nm2OFOO28
SERVICE POINTS OF REMOVALM!XTEtAC7. REMOVAL OF LIQUID
‘PIPE A AND LIQUID HOSE B
(1) Loosen the flare nut by using two wrenches.
(2) Plug the disconnected hose and pipes and the openingsof the condenser in order to prevent dust, dirt and other
foreign material from entering.
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55-34HEATERS AND MANUAL AIR CONDITIONER - :t%%: and Condenser8. REMOVAL OF CONDENSER
Move the radiator toward the engine, and then remove the
condenser upward.
d
INSPECTIONM55TCAKl Check the condenser fan for crushing or other damage.
l Check the condenser’s high-pressure hose and pipe in-
stallation parts for damage or deformation.
l Check the condenser fan shroud for damage.
CONDENSER FAN MOTOR CHECK
(1) Apply battery voltage to terminal @and ground terminal 8;at this time, check that the condenser fan motor turns.
(2) Apply battery voltage to terminal @and ground terminal 0;at this time, check that the condenser fan motor turns.
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