2003 LEXUS LS430 air conditioning

Fig. 49: Removing Heater Case Sub-Assy
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
18.REMOVE COOLER EXPANSION VALVE
a. Using a hexagon wrench 5 mm (0.20 in.), remove the 2 hexagon bolts and air conditioning tube
assy.

Fig. 50: Removing Hexagon Bolts (1 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
b. Remove the 2 O-rings from the air conditioning tube assy.
c. Using a hexagon wrench 5 mm (0.20 in.), remove the 2 hexagon bolts and cooler expansion valve.
d. Remove the 4 O-rin
gs from the cooler expansion valve.

Fig. 58: Removing Air Outlet Servomotor
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
26.REMOVE WIRING AIR CONDITIONING HARNESS SUB-ASSY
27.INSTALL COOLER EXPANSION VALVE
a. Sufficiently apply compressor oil to 4 new O-rings and fitting surface of the cooler expansion
valve.
Compressor oil: ND-OIL 8 or equivalent
b. Install the 4 O-rings to the cooler expansion valve.
c. Using a hexagon wrench 5 mm (0.20 in.), install the cooler expansion valve with the 2 hexagon
bolts.
Torque: 4.1 N.m (42 kgf.cm, 36 ft.lbf)

Fig. 63: Installing Air Duct Screws
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
30.TEMPORARILY INSTALL AIR CONDITIONING RADIATOR ASSY
a. Temporarily install the air conditioning radiator assy with the 2 bolts and nut.

Fig. 64: Installing Air Conditioning Radiator Assy Temporarily
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
31.FULLY INSTALL AIR CONDITIONING RADIATOR ASSY
a. Full
y install the air conditioning radiator assy with the 2 bolts and nut.

Fig. 65: Installing Air Conditioning Radiator Assy
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
32.INSTALL BLOWER ASSY (See OVERHAUL
)
33.INSTALL INSTRUMENT PANEL SAFETY PAD SUB-ASSY (See step 19 in REPLACEMENT
)
34.AFTER INSTALLATION, CHECK WATER VALVE OPERATION
a. Turn the ignition switch to the ON position.
b. Set the temperature control switch to "MAX. COOL" and "MAX. WARM" and check the water
valve operates as shown in Fig. 66
.
If operation is not as specified, proceed to the next step.

Fig. 72: Removing Blower Assy
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
9.REMOVE CLEAN AIR FILTER SUB-ASSY
10.REMOVE CLEAN AIR FILTER
11.REMOVE AIR CONDITIONING AMPLIFIER ASSY
a. Remove the 3 screws and air conditionin
g amplifier assy.

Fig. 73: Removing Air Conditioning Amplifier Assy
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
12.REMOVE AIR INLET SERVOMOTOR
a. Remove the 3 screws and the air inlet servomotor.