2003 LEXUS LS430 engine

REPLACEMENT
1.DRAIN ENGINE COOLANT (See ENGINE COOLANT
)
2.WORK FOR PREVENTING GASOLINE FROM SPILLING OUT (See PRECAUTION
)
3.DISCONNECT BATTERY NEGATIVE TERMINAL
4.REMOVE V-BANK COVER
5.REMOVE INTAKE AIR CONNECTOR PIPE
6.REMOVE THROTTLE BODY ASSY (See REPLACEMENT
)
7.REMOVE INTAKE MANIFOLD ASSY
Fig. 20: Disconnecting VSV Connector For EVAP

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Disconnect the fuel pipe sub-assy No. 2 from the fuel main tube (see PRECAUTION
).
b. Disconnect the VSV connector for EVAP.
c. Disconnect the EVAP hose from the VSV for EVAP.
d. Remove the bolt, disconnect the VSV for EVAP from the upper intake manifold.
e. Remove the bolt and V-bank cover bracket No. 2.
f. Remove the bolt and V-
bank cover bracket No. 3.

g. Disconnect the VSV connector for IAC Valve.
Fig. 21: Disconnecting VSV Connector For IAC Valve

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
h. Remove the bolt and V-bank cover bracket No. 1.
i. Remove the bolt and V-bank cover bracket No. 4.
j. Remove the 4 bolts, and disconnect the engine wire protector (LH side) from upper intake manifold
and camshaft bearing cap.

Fig. 22: Removing Bolts And Disconnecting Engine Wire Protector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
k. Disconnect the 2 wire clamps on the engine wire (RH side) from the brackets on the RH delivery
pipe.
l. Remove the 2 bolts, and disconnect the engine wire protector (rear side) from the rear water bypass
joint and RH cylinder head.
m. Disconnect the 8 injector connectors.
Fig. 23: Identifying Bolts

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
n. Remove the 6 bolts, 4 nuts, the upper and lower intake manifolds assembly and 2 gaskets.
8.REMOVE KNOCK SENSOR

Fig. 27: Installing Upper And Lower Intake Manifolds Assembly
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Torque: 18 N.m (185 kgf.cm, 13 ft.lbf)
c. Connect the 8 injector connectors.
d. Install the engine wire protector (rear side) with the 2 bolts.

Fig. 28: Identifying Wire Clamps
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
e. Install the engine wire protector (LH side) with the 4 bolts.
f. Install the 2 wire clamps on the engine wire (RH side) to the brackets on the RH delivery pipe.
g. Install the V-bank cover bracket No. 4 with bolt.
Fig. 29: Connecting VSV Connector For IAC Valve

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Torque: 7.5 N.m (76.5 kgf.cm, 66 in..lbf)
h. Install the V-bank cover bracket No. 1 with bolt.
Torque: 7.5 N.m (76.5 kgf.cm, 66 in..lbf)
i. Connect the VSV connector for IAC Valve.
j. Install the V-
bank cover bracket No. 3 with bolt.

16.REFILL ENGINE COOLANT (See ENGINE COOLANT )
17.CHECK FOR ENGINE COOLANT LEAKS (See ON
-VEHICLE INSPECTION )
COMPONENTS

1.DISCONNECT BATTERY NEGATIVE TERMINAL
2.REMOVE ENGINE ROOM SIDE COVER
a. Remove the 3 clips and engine room side cover.
3.REMOVE ECM COVER
a. Remove the 3 bolts and ECM cover.
4.REMOVE ECM
a. Remove the 2 nuts.
b. Disconnect the connector and remove the ECM.
5.REMOVE ECM GASKET

Torque: 5.5 N.m (55 kgf.cm, 48 in..lbf)
8.INSTALL ECM COVER
a. Install the ECM cover with the 3 bolts.
Torque: 5.0 N.m (51 kgf.cm, 44 in..lbf)
9.INSTALL ENGINE ROOM SIDE COVER
a. Install the engine room side cover with the 3 clips.
10.CONNECT BATTERY NEGATIVE TERMINAL
11.CONFIGURE ECM FOR OPTIONAL DYNAMIC RADAR/LASER CRUISE CONTROL
a. Be sure to perform the following procedures after replacing the ECM.
1. Turn the ignition switch ON.
2. Turn the cruise main switch ON.
3. With the brake pedal depressed, set the cruise control main switch to RES/ACC 3 times within 3
seconds. Check that the VSC buzzer sounds at this time.
4. Turn the ignition switch OFF.
5. Connect the intelligent tester II to the DLC3.
6. Turn the ignition switch ON and push the intelligent tester II main switch ON.
7. Select the item "L/C Option Flag" in the Data List.
8. Check that YES is displayed.
12.POWER WINDOW CONTROL SYSTEM INITIALIZE (See INITIALIZATION
)
13.FRONT POWER SEAT CONTROL SYSTEM INITIALIZE (See INITIALIZATION
)
REPLACEMENT
1.REMOVE ACCELERATOR PEDAL ROD ASSY