Page 6 of 1111
AC0WA±01
I03811
Smog Ventilation
Sensor
No. 2 Cooling Fan Relay
(Marking: FAN NO.2) No. 3 Cooling Fan Relay
(Marking: FAN NO.3)
CompressorMagnetic Clutch Relay
(Marking A/C COMP)
Condenser
Ambient Temperature Sensor Condenser Fan
Engine Coolant Temperature
(ECT) Switch
Air Inlet Servomotor
Blower Motor
Air Outlet Servomotor A/C Amplifier
EvaporatorSolar Sensor A/C Control Assembly
Electrical Multi Vision
(Built in A/C Control Assembly)
Expansion Valve
Air Refiner Filter
Blower Motor Control
Relay Evaporator Temperature
Sensor
Heater Radiator
Air Mix Servomotor
(Driver Side) Air Mix Servomotor
(Passenger Side)Room Temperature
Sensor
± AIR CONDITIONINGAIR CONDITIONING SYSTEM
AC±13
2698 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
LOCATION
Page 22 of 1111
AC0WO±01
I02372 I02370
I02371
Instrument Panel
Reinforcement
Blower Unit
Bracket
Wire Harness
Air Duct
No.2 Brace
No.1 Brace
Air Refiner Filter
Cover
Blower Motor Air Inlet Servomotor
Blower Unit Case
± AIR CONDITIONINGBLOWER UNIT
AC±29
2714 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
BLOWER UNIT
COMPONENTS
Page 31 of 1111
AC0WQ±01
± AIR CONDITIONINGBLOWER UNIT
AC±31
2716 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
DISASSEMBLY
1. REMOVE AIR REFINER FILTER
(a) Release the 4 claws and remove the cover.
(b) Pull out the air refiner filter.
2. REMOVE AIR INLET SERVOMOTOR
Remove the 3 screws and servomotor.
3. REMOVE BLOWER MOTOR
Remove the 3 screws and blower motor.
4. REMOVE BRACKET
Remove the screw and bracket.
Page 47 of 1111
AC22B±01
I09253
I09252I10327
O±Ring Liquid TubeDischarge Hose
N´m (kgf´cm, ft´lbf) : Specified torque
Non±reusable partAir Cleaner Assembly
Air Cleaner Duct Condenser
Bracket
Condenser
Dryer
Filter
Cap O±Ring
10 (100, 7)
10 (100, 7)
12.3 (125, 9)
Compressor oil ND±OIL 8 or equivalent
Radiator Upper Support
± AIR CONDITIONINGCONDENSER
AC±47
2732 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
COMPONENTS
Page 49 of 1111
AC22C±01
I10090
10 mm (0.39 in.)
Hexagon
Wrench
Modulator
I10092
I10093
2 Layered
Part
I10091
Protrusion
I10094
± AIR CONDITIONINGCONDENSER
AC±49
2734 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REPLACEMENT
REPLACE DRYER FROM MODULATOR
(a) Using a hexagon wrench (10 mm, 0.39 in.), remove the
cap from the modulator.
(b) Remove the filter from the modulator.
(c) Using pliers, remove the dryer.
(d) Insert a new dryer into the modulator.
NOTICE:
Do not remove the dryer from a vinyl bag until insert-
ing it into the modulator.
Install the dryer with its 2 layered part faced upward
to the modulator.
(e) Insert the filter into the modulator.
NOTICE:
Install the filter with its protrusion faced downward to the
modulator.
(f) Install the cap to the modulator.
(1) Apply compressor oil to the o±rings and screw part
of the cap.
Compressor oil: ND±OIL 8 or equivalent
(2) Using a hexagon wrench (10 mm, 0.39 in.), install
the caps.
Torque: 12.3 N´m (125 kgf´cm, 9 ft´lbf)
Page 95 of 1111
AC0Y0±01
I03748
± AIR CONDITIONINGAIR REFINER FILTER
AC±95
2780 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
AIR REFINER FILTER
REMOVAL
1. REMOVE GLOVE COMPARTMENT DOOR
(See page BO±91)
2. REMOVE AIR REFINER FILTER
(a) Remove the cover.
(b) Pull out the air refiner filter.
Page 96 of 1111
AC0Y1±01
AC±96
± AIR CONDITIONINGAIR REFINER FILTER
2781 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSTALLATION
Installation is in the reverse order of removal (See page AC±95).
Page 241 of 1111

6RadioPOOR RECEPTION
Is the condition bad in comparison with other vehicles?
Are there any additional installation parts?
(Sun shade film, telephone antenna, etc.)
Check if there is any scratch and breaking of a wire on
the glass antenna and the defogger pattern.
(visual check. tester)
(See page
BE±190)
Is the contact of the plug jack of the radio OK?
Does the condition get better by using the outer
antenna (such as pillar antenna)?
Is the contact of the antenna terminal on the glass
surface and the defogger terminal?
Is the continuity of the antenna cord OK?
Check the grounding of the antenna, antenna cord,
choke coil, and noise filter. (See page BE±190)
Does the condition get better by replacing
the choke coil?
Does the condition get better by replacing the
antenna cord?Take a measure for contact. An electric wave environment is bad.
Does the condition get better if
removing them?
Influence of additional installation parts.
Repair. (See page BE±108)
Check the radio.
Take a measure for contact.
Grounding failure. Replace the antenna cord.
Replace the choke coil.
Replace the antenna cord. Ye s
No
Exchange the glass.Ye s
Ye s
Ye s
Ye s
Ye s
Ye s
Ye s
Ye s No
No
No
NoNo
No
No
No
NG
OK
Ye s BE±202
± BODY ELECTRICALAUDIO SYSTEM
2503 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)