2003 LEXUS LS430 engine

If the resistance is less than the specified value, proceed to step (d).
HINT:
If the megaohmmeter is not available, perform the following simple inspection instead.
b. Alternative inspection method:
1. Quickly accelerate the engine to 4,000 rpm 5 times.
2. Remove the spark plug.
3. Visually check the spark plug.
If the electrode is dry, the spark plug is functioning. Reinstall the spark plug. Proceed to step
3.
If the electrode is damp, proceed to steps (c), (d) and (e).

Fig. 11: Identifying Ignition Coil Components And Replacements
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
REPLACEMENT
1.REMOVE V-BANK COVER
2.REMOVE ENGINE ROOM SIDE COVER
3.REMOVE INTAKE AIR CONNECTOR PIPE

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

COMPONENTS
Fig. 13: Identifying Camshaft Position Sensor Components And Replacements

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
REPLACEMENT
1.REMOVE AIR CLEANER INLET NO. 1 (See step 5 in REPLACEMENT
)
2.DRAIN ENGINE COOLANT (See REPLACEMENT
)

3.REMOVE V-BANK COVER
4.REMOVE ENGINE ROOM SIDE COVER
5.DISCONNECT RADIATOR HOSE NO. 1
6.REMOVE TIMING BELT COVER SUB-ASSY NO. 3 LH (See step 18 in REPLACEMENT
)
7.REMOVE CAMSHAFT POSITION SENSOR
a. Remove the bolt, stud bolt and sensor.
Fig. 14: Removing Camshaft Position Sensor

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
8.INSTALL CAMSHAFT POSITION SENSOR
a. Install a new sensor with the bolt and stud bolt.
Torque: 7.5 N.m (76 kgf.cm, 66 in.lbf)
9.INSTALL TIMING BELT COVER SUB-ASSY NO. 3 LH (See step 33 in REPLACEMENT
)
10.CONNECT RADIATOR HOSE NO. 1
11.INSTALL AIR CLEANER INLET NO. 1 (See step 145 in REPLACEMENT
)
12.INSTALL ENGINE ROOM SIDE COVER
13.INSTALL V-BANK COVER

14.REFILL ENGINE COOLANT (See REPLACEMENT )
15.WARM UP ENGINE
16.CHECK FOR ENGINE COOLANT LEAKS
COMPONENTS

Fig. 15: Identifying Crankshaft Position Sensor Components And Replacements
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
REPLACEMENT
1.REMOVE ENGINE UNDER COVER NO. 1
2.REMOVE CRANKSHAFT POSITION SENSOR

4.INSTALL ENGINE UNDER COVER NO. 1