Lexus ES300 (1997 year). Manual — part 482

P20584

IG0152

S05622

Ohmmeter

S04729

Ohmmeter

–

IGNITION

IGNITION SYSTEM

IG–5

976

1997 LEXUS ES300 (RM511U)

(f)

Inspect the electrode gaps.
Maximum electrode gap for used spark plug:
1.3 mm (0.051 in.)

If the gap is greater than maximum, replace the spark plug.

Correct electrode gap for new spark plug:
1.1 mm (0.043 in.)

NOTICE:
If adjusting the gap of a new spark plug, bend only the base
of the ground electrode. Do not touch the tip. Never attempt
to adjust the gap on the used plug.
(g)

Clean the spark plugs.

If the electrode has traces of wet carbon, allow it to dry and then
clean with a spark plug cleaner.

Air pressure: Below 588 kPa (6 kgf/cm

2

, 85 psi)

Duration: 20 seconds or less

HINT:
If there are traces of oil, remove it with gasoline before using the
spark plug cleaner.
(h)

Using a 16 mm plug wrench, install the 6 spark plugs to
the RH and LH cylinder heads.
Torque: 18 N·m (180 kgf·cm, 13 ft·lbf)

(i)

Install the ignition coils.

4.

INSPECT IGNITION COILS

(a)

Disconnect the high–tension cords from the ignition coils.

(b)

Disconnect the ignition coil connectors.

(c)

Using an ohmmeter, measure the primary coil resistance
between the positive (+) and negative (–) terminals.
Primary coil resistance:

Cold

0.70 – 0.94

Ω

Hot

0.85 – 1.10

Ω

If the resistance is not as specified, replace the ignition coil.

(d)

Using an ohmmeter, measure the secondary coil resis-
tance between the positive (+) and high–tension terminal.
Secondary coil resistance:

Cold

10.8 – 14.9 k

Ω

Hot

13.1 – 17.5 k

Ω

If the resistance is not as specified, replace the ignition coil.
(e)

Connect the ignition coil connectors.

(f)

Connect the high–tension cords to the ignition coils.

S05687

Ohmmeter

IG–6

–

IGNITION

IGNITION SYSTEM

977

1997 LEXUS ES300 (RM511U)

5.

INSPECT CAMSHAFT POSITION SENSOR

(a)

Disconnect the camshaft position sensor connector.

(b)

Using an ohmmeter, measure the resistance between ter-
minals.
Resistance:

Cold

835 – 1,400

Ω

Hot

1,060 – 1,645

Ω

If the resistance is not as specified, replace the camshaft posi-
tion sensor.
(c)

Connect the camshaft position sensor connector.

S05512

IG024–01

–

IGNITION

IGNITION COIL

IG–7

978

1997 LEXUS ES300 (RM511U)

IGNITION COIL

REMOVAL

1.

DISCONNECT HIGH–TENSION CORDS FROM
IGNITION COILS (See page

IG–1

)

2.

REMOVE IGNITION COILS

(a)

Disconnect the 3 connectors from the ignition coil.

(b)

Remove the 3 bolts and 3 ignition coils from the LH cylin-
der head.
Torque: 8 N·m (80 kgf·cm, 69 in.·lbf)

HINT:
Arrange the ignition coils in correct order.

IG025–01

IG–8

–

IGNITION

IGNITION COIL

979

1997 LEXUS ES300 (RM511U)

INSTALLATION

Installation is in the reverse order of removal (See page

IG–7

).