Lexus SC300 / Lexus SC400. Manual — part 37
12. REMOVE CONNECTOR BRACKET FROM UNDER SIDE
OF BLOWER MOTOR
Remove the two screws and the bracket.
13. REMOVE A/C UNIT
(a) Disconnect connectors from the unit.
(b) Remove the six bolts and the A/C unit.
INSTALLATION OF A/C UNIT
1. INSTALL
A/C
UNIT
(a) Match the standard holes of the A/C unit with those on the
vehicle.
HINT:
•
V
Pull the drain hose of the A/C unit forward until the
yellow paint on the hose is visible in the engine
compartment.
•
V
Insert the drain hose into the engine compartment hose
until the match marks are aligned.
(b) Tighten six bolts.
2. INSTALL
CONNECTOR
BRACKET
3.
INSTALL HEATER TO RESISTER NO. 3 DUCT
4.
INSTALL REAR AIR DUCTS
5.
INSTALL FLOOR CARPET
6. INSTALL
INSULATOR
RETAINER
7.
INSTALL WATER HOSE TO HEATER RADIATOR
8.
INSTALL BRAKE TUBE BRACKET MOUNTING BOLTS
9. INSTALL
WATER
VALVE
AC–108
–
AIR CONDITIONING SYSTEM
Troubleshooting
9. INSTALL
EVAPORATOR
10. INSTALL INSTRUMENT PANEL REINFORCEMENT
11. INSTALL
ENGINE
See page EM–167
12. EVACUATE AIR IN REFRIGERATION SYSTEM AND
CHARGE WITH REFRIGERANT
See page
Specified amount: 950
±
50 g (33.44
±
1.76 oz)
13. INSPECT FOR LEAKAGE OF REFRIGERANT
Using a gas leak tester, check for leakage of refrigerant.
–
AIR CONDITIONING SYSTEM
Troubleshooting
AC–109
COMPRESSOR
INSPECTION OF COMPRESSOR
(Magnetic Clutch)
See page
(Compressor)
1.
INSTALL MANIFOLD GAUGE SET
See page
2. START
ENGINE
3.
INSPECT COMPRESSOR FOR METALLIC SOUND
Check that there is metallic sound from the compressor when
the A/C switch is turned on.
If a metallic sound is heard, replace the compressor assem-
bly.
4.
INSPECT PRESSURE OF REFRIGERATION SYSTEM
See ”Inspection of Refrigeration System with Manifold
Gauge Set” on page.
5. STOP
ENGINE
6.
INSPECT VISUALLY FOR LEAKAGE OF REFRIGERANT
FROM SAFETY SEAL
If there is any leakage, replace the compressor assembly.
AC–110
–
AIR CONDITIONING SYSTEM
Troubleshooting
REMOVAL OF COMPRESSOR
1. RUN ENGINE AT IDLE SPEED WITH A/C ON FOR
APPROX. TEN MINUTES
2. STOP
ENGINE
3.
DISCONNECT NEGATIVE (–) CABLE FROM BATTERY
4. RECOVER
REFRIGERANT
FROM
REFRIGERATION
SYSTEM
5.
DISCONNECT DISCHARGE HOSE AND SUCTION HOSE
FROM COMPRESSOR
NOTICE: Cap the open fittings immediately to keep mois-
ture out of the system.
6.
DISCONNECT CONNECTOR FROM MAGNETIC CLUTCH
7.
REMOVE DRIVE BELT
See step 6 on page EM–118.
–
AIR CONDITIONING SYSTEM
Compressor
AC–111
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