2003 LEXUS LS430 replacement

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.

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.

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. 70: Installing Suction Tube Sub-Assy B
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
40.CONNECT NEGATIVE TERMINAL CABLE TO BATTERY
41.ADD ENGINE COOLANT (See REPLACEMENT
)
42.CHARGE REFRIGERANT (See REPLACEMENT
)
43.WARM UP ENGINE
44.CHECK FOR ENGINE COOLANT LEAKS (See REPLACEMENT
)
45.INSPECT FOR REFRIGERANT LEAKAGE (See REPLACEMENT
)
COMPONENTS

Fig. 71: Identifying Blower Assy Components And Replacements
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
OVERHAUL
HINT:

Installation is in the reverse order of removal.
See COMPONENTS .
1.DISCONNECT NEGATIVE TERMINAL CABLE FROM BATTERY
2.REMOVE FRONT DOOR SCUFF PLATE LH (See REPLACEMENT
)
3.REMOVE FRONT PILLAR GARNISH LH (See step 33 in REPLACEMENT
)
4.REMOVE INSTRUMENT PANEL UNDER COVER SUB-ASSY NO. 2 (See step 21 in
REPLACEMENT
)
5.REMOVE INSTRUMENT PANEL GARNISH SUB-ASSY RH (See step 22 in REPLACEMENT
)
6.REMOVE GLOVE COMPARTMENT DOOR ASSY W/ INSTRUMENT PANEL AIRBAG ASSY
LOWER NO. 2 (See step 25 in REPLACEMENT
)
7.REMOVE AIR SUSPENSION AND HEADLIGHT BEAM LEVEL CONTROL ECU
a. Disconnect the connectors.
b. Remove the 2 nuts and air suspension and headlight beam level control ECU.
8.REMOVE BLOWER ASSY
a. Disconnect the connectors.
b. Remove the nut and 3 bolts.
c. Remove the blower assy.