LEXUS LS430 2003 Factory Repair Manual

Fig. 36: Removing Air Conditioner Control Assembly
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
10.REMOVE HEATER CONTROL HOUSING
a. Remove the 2 screws, release the 4 claws and remove the heater control housin
g.

Fig. 37: Removing Heater Control Housing
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
11.REMOVE HEATER CONTROL BULB
a. Usin
g a screwdriver, turn the bulbs to the left and pull out the bulbs.

Fig. 38: Removing Heater Control Bulb
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
12.REMOVE HEATER CONTROL BASE SUB-ASSY
a. Release the 4 claws and remove the heater control base.

Fig. 39: Removing Heater Control Base Sub-Assy
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
13.REMOVE AIR CONDITIONER PANEL SUB-ASSY
COMPONENTS

Fig. 40: Identifying Air Conditioning Radiator Assy Components And Replacements (1 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig. 41: Identifying Air Conditioning Radiator Assy Components And Replacements (2 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION
1.CHECK EVAPORATOR AND HEATER RADIATOR FINS FOR FOREIGN MATTER
If foreign matter is attached to the fin, blow it off with compressed air.
2.CHECK FITTINGS FOR CRACKS OR SCRATCHES
a. Repair as necessary.
3.INSPECT EVAPORATOR TEMPERATURE SENSOR CIRCUIT (See DTC B1413:
EVAPORATOR TEMPERATURE SENSOR CIRCUIT )
4.INSPECT COOL AIR BYPASS DAMPER POSITION SENSOR CIRCUIT (DRIVER SIDE) (See
DTC B1434: MAX COOL DAMPER POSITION SENSOR CIRCUIT (DRIVER SIDE)
)
5.INSPECT COOL AIR BYPASS DAMPER CONTROL SERVOMOTOR CIRCUIT (DRIVER
SIDE) (See COOL AIR BYPASS DAMPER CONTROL SERVOMOTOR CIRCUIT (DRIVER
SIDE) )
6.INSPECT COOL AIR BYPASS DAMPER POSITION SENSOR CIRCUIT (PASSENGER SIDE)
(See COOL AIR BYPASS DAMPER CONTROL SERVOMOTOR CIRCUIT (PASSENGER
SIDE) )
7.INSPECT COOL AIR BYPASS DAMPER CONTROL SERVOMOTOR CIRCUIT (PASSENGER
SIDE) (SEE COOL AIR BYPASS DAMPER CONTROL SERVOMOTOR CIRCUIT
(PASSENGER SIDE) )
8.INSPECT WATER VALVE CONTROL SERVOMOTOR CIRCUIT (See WATER VALVE
CONTROL SERVOMOTOR CIRCUIT )
9.INSPECT AIR VENT MODE DAMPER CONTROL SERVOMOTOR CIRCUIT (See AIR VENT
MODE DAMPER CONTROL SERVOMOTOR CIRCUIT )
10.INSPECT AIR MIX DAMPER CONTROL SERVOMOTOR CIRCUIT (See AIR MIX DAMPER
CONTROL SERVOMOTOR CIRCUIT )
OVERHAUL
HINT:
Installation is in the reverse order of removal.
See COMPONENTS .
1.DISCONNECT NEGATIVE TERMINAL CABLE FROM BATTERY
2.EVACUATE REFRIGERANT HFC-134A (R134A) (See REPLACEMENT
)
3.DRAIN ENGINE COOLANT FROM RADIATOR
HINT:
It is not necessar
y to drain out all coolant.

4.REMOVE V-BANK COVER
5.DISCONNECT SUCTION TUBE SUB-ASSY B
a. Remove the bolts and slide the plate. Disconnect suction tube sub-assy B.
b. Remove the O-ring.
Fig. 42: Disconnecting Suction Tube Sub
-Assy B
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
6.DISCONNECT LIQUID TUBE SUB-ASSY A
a. Disconnect liquid tube sub-assy A.
b. Remove the O-ring.

7.DISCONNECT HEATER WATER OUTLET HOSE A (FROM HEATER UNIT)
a. Grip the claws of the hose clip and slide the hose clip along the hose.
b. Disconnect heater water outlet hose A.
Fig. 43: Disconnecting Heater Water Outlet Hose A (From Heater Unit)

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
8.DISCONNECT HEATER WATER INLET HOSE B
a. Disconnect heater water inlet hose B.
9.DISCONNECT WATER VALVE CONTROL CABLE
10.REMOVE INSTRUMENT PANEL SAFETY PAD SUB-ASSY (See step 19 in REPLACEMENT
)
11.REMOVE BLOWER ASSY (See OVERHAUL
)
12.REMOVE SEAT (See OVERHAUL
)
13.SEPARATE AIR DUCT REAR NO. 1
a. Remove the 2 screws, bolt and center air duct.

b. Remove the 2 hole covers, 2 screws and air duct rear No. 1.
Fig. 44: Separating Air Duct Rear No. 1

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
14.SEPARATE AIR DUCT REAR NO. 2
a. Remove the 2 hole covers, 2 screws and air duct No. 2.
15.SEPARATE CONSOLE BOX DUCT NO. 1
a. Slide the floor carpet backward.
b. Disconnect the wire harness clamp.
c. Remove the 4 nuts and console box duct No. 1.