2003 LEXUS LS430 cylinder head

1.953 in.) protruding from the camshaft bearing cap installation surface of the cylinder head.
Fig. 396: Applying Adhesive To End Of Spark Plug Tube

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig. 433: Cleaning Cylinder Block Using Gasket Scraper
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
c. Inspect for warpage.
1. Using a precision straight edge and feeler gauge, measure the surfaces contacting the cylinder
head and main bearing cap for warpage.
Maximum warpage: 0.07 mm (0.0028 in.)
If the warpa
ge is greater than the maximum, replace the cylinder block sub-assy.

Fig. 434: Measuring Surfaces Contacting Cylinder Head
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
d. Visuall
y check the cylinder for vertical scratches.

OPERATION AND TILT AND TELESCOPIC POSITION OPERATION
HINT:
*1: Wireless door lock control system
*2: Smart key system
If the result is not as specified, inspect the tilt and telescopic.
4.CHECK FRONT POWER SEAT FUNCTION
a. Check the basic functions.
1. Operate the power seat switches and check to make sure each seat function works:
Sliding
Front vertical
Lifter
Reclining
Lumbar support
Cushion sliding
Headrest
OperationTilt and Telescopic Position Operation
Key is inserted to the key cylinder*1 Engine switch is
pushed*2Vertical tilt position
Key is inserted to the key cylinder*1 Engine switch is
pushed*2Telescopic flexibility (lengthening and
shortening)

signaling that the seat position has been recorded.
3. Change the position of the seat and then press the M2 switch. Check that the buzzer sounds
for 0.1 seconds and the seat automatically moves to the position in step (c)-(1).
d. Check the M3 switch.
1. Using the seat switches, fully slide the seat rearward, fully recline the seatback rearward and
fully lower the seat cushion and headrest.
2. Press and hold down switches M3 and SET. Check that the buzzer sounds for 0.5 seconds,
signaling that the seat position has been recorded.
3. Change the position of the seat and then press the M3 switch. Check that the buzzer sounds
for 0.1 seconds and the seat automatically moves to the position in step (d)-(1).
e. Check that the switches M1, M2 and M3 cause the seat to move to the recorded seat positions
under these conditions: turn the ignition switch to the LOCK position, remove the key from the key
cylinder, open the driver side door and press M1, M2 or M3 within 30 seconds.
f. Check that the following procedures will erase the recorded seat positions of switches M1, M2 and
M3: press and hold the power seat slide switch, disconnect the battery's negative terminal cable,
and wait for at least 1 minute.
g. Restore the seat's memory.
1. Using the seat switches, fully slide the seat forward, fully recline the seatback forward, and
fully raise the seat cushion and headrest.
2. Using the seat switches, fully slide the seat rearward, fully recline the seatback rearward and
fully lower the seat cushion and headrest.
HINT:
This will restore the seat's memory of the seat's maximum positions. However, it will not restore
any recorded seat positions to switches M1, M2 or M3.
h. Attempt to record a seat position by pressing and holding the SET switch and two other switches
<000b0044005000520051004a000300300014000f0003003000150003004400510047000300300016000c0011000300310052000300560048004400570003005300520056004c0057004c0052005100030056004b00520058004f0047000300450048000300
550048004600520055004700480047001100030026004b0048[ck this by pressing M1, M2 or
M3 and making sure that the seat does not move.
HINT:
This step will only be true if step (f) was performed properly, whereby all previously recorded set
positions were erased.
1.Passenger's seat:
INSPECT POWER SEAT SWITCH
a. Measure the resistance between the terminals when each switch is operated.
Standard:

4.REMOVE OIL LEVEL GAGE SUB-ASSY (See step 8 in REPLACEMENT )
5.REMOVE IGNITION COIL ASSY
a. Disconnect the ignition coil connector.
b. Remove the bolt and pull out the ignition coil.
Fig. 12: Removing Ignition Coil Assy

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
6.INSTALL IGNITION COIL ASSY
a. Connect a new ignition coil to the spark plug, attach the ignition coil to the cylinder head cover,
and install the bolt.
Torque: 7.5 N.m (76 kgf.cm, 66 in.lbf)
b. Connect the ignition coil connector.
7.INSTALL OIL LEVEL GAGE SUB-ASSY (See step 27 in REPLACEMENT
)
8.INSTALL INTAKE AIR CONNECTOR PIPE
9.INSTALL V-BANK COVER
10.INSTALL ENGINE ROOM SIDE COVER

Fig. 9: Disconnecting Fuel Pipe Sub-Assy No. 2
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
13.REMOVE INTAKE MANIFOLD
a. Remove the bolt and the water by-pass pipe No. 1 and No. 2.
b. Disconnect the vacuum hose for the brake booster.
c. Disconnect the air hose for the power steering.
d. Disconnect the ventilation hose.
e. Disconnect the injector connector.
f. Remove the 6 bolts, 4 nuts and intake manifold.
14.REMOVE INTAKE MANIFOLD TO HEAD GASKET NO. 1
15.INSTALL INTAKE MANIFOLD TO HEAD GASKET NO. 1
a. Install 2 new gaskets to the cylinder head.
HINT:
The white-painted area on each gasket should face up as shown in the illustration.