2003 LEXUS LS430 engine

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

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

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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. 85: Installing Cooler Refrigerant Discharge Hose No. 1
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
16.INSTALL FAN AND GENERATOR V BELT (See REPLACEMENT
)
17.INSTALL AIR CLEANER INLET NO. 1 (See step 25 in REPLACEMENT
)
18.CONNECT NEGATIVE TERMINAL CABLE TO BATTERY
19.CHARGE REFRIGERANT (See REPLACEMENT
)
20.WARM UP ENGINE
21.INSPECT FOR REFRIGERANT LEAKAGE (See REPLACEMENT
)
ON-VEHICLE INSPECTION
1.INSPECT COOLER CONDENSER ASSY
a. If the fins of the cooler condenser assy are dirty, clean them with water and dry them with

Fig. 95: Removing Radiator Support Sub-Assy Upper
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
12.REMOVE COOLER CONDENSER ASSY
a. Push down the 2 condenser brackets.
b. Push the radiator toward the engine.
c. Push the condenser toward the radiator and then pull it upward as shown in Fig. 96
.

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).

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Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
39.CHARGE REFRIGERANT (See REPLACEMENT
)
40.WARM UP ENGINE
41.INSPECT FOR REFRIGERANT LEAKAGE (See REPLACEMENT
)

6. Visually check if spark occurs while the engine is being cranked.
If a spark does not occur, perform the test as follows:
Fig. 4: Spark Test Flow Diagram

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7. Using a 16 mm (0.63 in.) plug wrench, install the spark plugs.
Torque: 18 N.m (180 kgf.cm, 13 ft.lbf)
8. Install the ignition coils (see REPLACEMENT
).