LEXUS LS430 2003 Factory Repair Manual

Fig. 103: Installing Discharge Hose Sub-Assy No. 1
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
17.CONNECT NEGATIVE TERMINAL CABLE TO BATTERY
18.CHARGE REFRIGERANT (See REPLACEMENT
)
19.WARM UP ENGINE
20.INSPECT FOR REFRIGERANT LEAKAGE (See REPLACEMENT
)
ON-VEHICLE INSPECTION
1.INSPECT EXPANSION VALVE
a. Check quantity of gas during refrigeration cycle.
b. Set on manifold gauge set.
c. Run engine.
1. Run the engine at 1,500 rpm for at least 5 minutes.
2. Then check that the high pressure reading is 1.37 to 1.57 Mpa (14 to 16 kgf.cm
2 , 199 to 288
psi).

d. Check expansion valve.
If the expansion valve is faulty, the low pressure reading will drop to 0kPa (0 kgf cm
2 , 0 psi).
HINT:
When the lower pressure drop to 0kPa (0 kgf cm
2 , 0 psi), feel the receiver's IN and OUT sides for no
temperature difference.
COMPONENTS

Fig. 104: Identifying Rear Air Conditioning Unit Assy Components And Replacements (1 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig. 105: Identifying Rear Air Conditioning Unit Assy Components And Replacements (2 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION
1.INSPECT REAR BLOWER MOTOR CIRCUIT (See REAR BLOWER MOTOR CIRCUIT
)
2.EXHAUST DAMPER CONTROL SERVOMOTOR CIRCUIT (See EXHAUST DAMPER
CONTROL SERVOMOTOR CIRCUIT )
3.INSPECT REAR MAGNETIC VALVE CIRCUIT (See REAR MAGNETIC VALVE CIRCUIT
)
4.INSPECT SMOKE SENSOR CIRCUIT (See SMOKE SENSOR CIRCUIT
)
5.INSPECT EVAPORATOR SUB-ASSY (REAR)
a. Check the evaporator sub-assy (rear) fins for blockage.
If the fins are clogged, clean them with compressed air.
b. Check the fitting for cracks or scratches.
If necessary, repair or replace.
6.INSPECT COOLING BOX LAMP SUB-ASSY
a. Connect positive (+) lead to terminal 1 and negative (-) lead to terminal 2.
b. Check that the cooling box lamp sub-assy comes on.
If coolin
g box light does not come on, replace the cooling box lamp sub-assy.

Fig. 106: Inspecting Cooling Box Lamp Sub-Assy
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OVERHAUL
HINT:
Installation is in the reverse order of removal.
See COMPONENTS .
1.EVACUATE REFRIGERANT HFC-134A (R134A) (See REPLACEMENT
)
2.REMOVE LUGGAGE COMPARTMENT FLOOR MAT (See REPLACEMENT
)
3.REMOVE DECK TRIM SIDE BOARD RH (See REPLACEMENT
)
4.REMOVE DECK TRIM SIDE BOARD LH (See REPLACEMENT
)
5.REMOVE LUGGAGE COMPARTMENT TRIM COVER FRONT (See REPLACEMENT
)
6.REMOVE REAR SEAT CUSHION ASSY (See OVERHAUL
)

7.REMOVE REAR SEAT BACK ASSY (See step 4 in OVERHAUL )
8.REMOVE PACKAGE TRAY TRIM PANEL ASSY (See step 4 in REPLACEMENT
)
9.REMOVE ROOF SIDE GARNISH INNER RH (See see step 3 in REPLACEMENT
)
10.REMOVE ROOF SIDE GARNISH INNER LH (See step 3 in REPLACEMENT
)
11.REMOVE PACKAGE TRAY TRIM PANEL ASSY (See step 4 in REPLACEMENT
)
12.REMOVE PIPE COOLER REFRIGERANT SUCTION A
a. Remove the bolt and pipe cooler refrigerant suction A.
b. Remove the O-ring.
Fig. 107: Removing Pipe Cooler Refrigerant Suction A

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
13.REMOVE A PIPE COOLER REFRIGERANT LIQUID
a. Remove the bolt and A pipe cooler refrigerant liquid.

b. Remove the O-ring.
14.REMOVE AIR DUCT NO. 3
a. Remove air duct No. 3.
Fig. 108: Removing Air Duct No. 3

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15.REMOVE AIR DUCT NO. 5
a. Remove air duct No. 5.

Fig. 109: Removing Air Duct No. 5
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16.REMOVE AIR DUCT NO. 1
a. Release the claw and remove air duct No. 1.

Fig. 110: Removing Air Duct No. 1 Claw
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17.REMOVE AIR DUCT NO. 2
a. Release the claw and remove air duct No. 2.