LEXUS LS430 2003 Factory Repair Manual

Fig. 74: Removing Air Inlet Servomotor
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
13.REMOVE BLOWER MOTOR ASSY (COOLING UNIT MOTOR SUB-ASSY W/FAN)
a. Remove the 3 screws and blower motor assy (cooling unit motor sub-assy w/fan).
ON-VEHICLE INSPECTION
1.INSPECT COMPRESSOR FOR METALLIC SOUND
a. Check if there is abnormal metallic sound from the compressor when the A/C switch is ON and the
compressor operates.
If abnormal metallic sound is heard, replace the compressor assembly.
2.INSPECT REFRIGERANT PRESSURE (See ON
-VEHICLE INSPECTION )
3.INSPECT FOR LEAKAGE OF REFRIGERANT

a. Using a gas leak detector, check for leakage of refrigerant.
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4.INSPECT W/PULLEY COMPRESSOR ASSY
a. Check operation of w/pulley compressor assy.
1. Start the engine.
2. Inspect the compressor pulley.
Standard: The compressor shaft rotates along with the pulley
Fig. 75: Inspecting W/Pulley Compressor Assy

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
5.INSPECT SOLENOID OF THE EXTERNALLY CHANGEABLE COMPRESSOR
a. Turn the ignition switch off.
b. Disconnect the connector.
c. Measure resistance between terminals 1 and 2.
Standard resistance: 10 to 11 ohms
HINT:
If resistance is not within the specified ran
ge, replace the compressor.

Fig. 76: Inspecting Solenoid Of Externally Changeable Compressor
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
REPLACEMENT
1.DISCONNECT NEGATIVE TERMINAL CABLE FROM BATTERY
2.EVACUATE REFRIGERANT HFC-134A (R134A) (See REPLACEMENT
)
3.REMOVE AIR CLEANER INLET NO. 1 (See REPLACEMENT
)
4.REMOVE FAN AND GENERATOR V BELT (See REPLACEMENT
)
5.REMOVE ENGINE UNDER COVER NO. 1
6.DISCONNECT COOLER REFRIGERANT DISCHARGE HOSE NO. 1
a. Remove the nut and disconnect the cooler refrigerant discharge hose No. 1.
b. Remove the O-ring from the cooler refrigerant discharge hose No. 1.

Fig. 77: Disconnecting Cooler Refrigerant Discharge Hose No. 1
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
7.DISCONNECT COOLER REFRIGERANT SUCTION HOSE NO. 1
a. Remove the bolt and disconnect the cooler refrigerant suction hose No. 1.
b. Remove the O-ring from the cooler refrigerant suction hose No. 1.

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Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
8.REMOVE COMPRESSOR MOUNTING BRACKET NO. 1
a. Remove the bolt, nut and compressor mounting bracket No. 1.

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Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
9.REMOVE W/PULLEY COMPRESSOR ASSY
a. Disconnect the connector.
b. Remove the 2 bolts and w/pulley compressor assy.

Fig. 80: Removing W/Pulley Compressor Assy
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
10.ADJUST COMPRESSOR OIL
a. When replacing the compressor and magnetic clutch with a new one, after gradually removing the
refrigerant gas from the service valve, drain the following amount of oil from the new compressor
and magnetic clutch before installation.
Standard:
(Oil capacity inside the new compressor: 130 +15 cc (4.4 +0.5 fl.oz)) - (Remaining oil
amount in the removed compressor) = (Oil amount to be removed from the new
compressor when replacing)

11.TEMPORARILY TIGHTEN W/PULLEY COMPRESSOR ASSY
a. Temporarily tighten the w/pulley compressor assy with the 2 bolts.
b. Connect the connector.
Fig. 81: Tightening W/Pulley Compressor Assy Bolts Temporarily

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
12.INSTALL COMPRESSOR MOUNTING BRACKET NO. 1
a. Install the compressor mounting bracket No. 1 with the bolt and nut.
Torque:
Bolt: 49 N.m (500 kgf.cm, 36ft.lbf)
Nut: 30 N.m (306 kgf.cm, 22 ft.lbf)

Fig. 82: Installing Compressor Mounting Bracket No. 1
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
13.FULLY TIGHTEN W/PULLEY COMPRESSOR ASSY
a. Fully tighten the w/pulley compressor assy with the 2 bolts.
Torque: 49 N.m (500 kgf.cm, 36 ft.lbf)

Fig. 83: Tightening W/Pulley Compressor Assy
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
14.INSTALL COOLER REFRIGERANT SUCTION HOSE NO. 1
a. Remove the attached vinyl tape from the hose.
b. Sufficiently apply compressor oil to the new O-ring and fitting surface of the compressor and
magnetic clutch.
Compressor oil: ND-OIL 8 or equivalent
c. Install an O-ring to the cooler refrigerant suction hose No. 1.
d. Install the cooler refrigerant suction hose No. 1 to the compressor and magnetic clutch with the
bolt.
Torque: 9.8 N.m (100 kgf.cm, 7 ft.lbf)