Lexus SC300 / Lexus SC400. Manual — part 525

2.

REMOVE INTAKE AIR CONNECTOR
(a) Disconnect the following hoses:

(1) Air hose from ISC valve
(2) Air hose (from PS air control valve) from intake air

connector

(b) Remove the bolt holding the intake air connector to the

cylinder head cover.

(c) Loosen the two hose clamps.
(d) Disconnect the intake air connector from the throttle

body and air cleaner hose, and remove the throttle body.

3.

REMOVE UPPER HIGH–TENSION CORD COVER
(a) Remove the two mounting bolts.
(b) Disconnect the front side claw groove of the cord cover

from the claw of the lower cover, and remove the cord
cover.

4.

REMOVE RH ENGINE WIRE COVER
Remove the bolt and engine wire cover.

5.

REMOVE LH ENGINE WIRE COVER
Remove the two bolts and engine wire cover.

IG–12

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IGNITION SYSTEM

High–Tension Cords and Cord Clamps

6.

REMOVE VSV FOR EVAP SYSTEM
Remove the two bolts, and disconnect the VSV from cylinder
head and timing belt cover.

7.

REMOVE RH NO.3 TIMING BELT COVER
Remove the three bolts and timing belt cover.

8.

REMOVE LH NO.3 TIMING BELT COVER
(a) Remove the four mounting bolts.
(b) Disconnect

the cord grommet from the timing belt cover,

and remove the timing belt cover.

(c) Remove the cord grommet from the high–tension cord.

9.

REMOVE HIGH–TENSION CORDS
(a) Disconnect the high–tension cords from the spark plugs

and distributor caps. Disconnect the high–tension cords
at the rubber boot. Do not pull on the cords.

NOTICE: Pulling on or bending the cords may damage
the conductor inside.

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IGNITION SYSTEM

High–Tension Cords and Cord Clamps

IG–13

(b) Disconnect the high–tension cords from the ignition

coils.

•

Using a screwdriver, lift up the lock claw and
disconnect the holder from the ignition coil.

•

Disconnect the high–tension cord at the grommet.
Do not pull on the cord.

NOTICE: Pulling on or bending the cords may damage
the conductor inside.
(c) Disconnect the high–tension cords from the cord

clamps and lower high–tension cord cover, and remove
the ten high–tension cords.

(d) Remove the five cords clamp from the high–tension

cords.

10. REMOVE RH HIGH–TENSION CORD CLAMPS

(a) Remove the two bolts and two high–tension cord

clamps.

(b) Remove the cord clamp from the front high–tension cord

clamp.

11. REMOVE LH HIGH–TENSION CORD CLAMPS

(a) Remove the two bolts and two high–tension cord

clamps.

(b) Remove the cord clamp from the front high–tension cord

clamp.

12. REMOVE LOWER HIGH–TENSION CORD COVER

Remove the bolt and high–tension cord cover.

IG–14

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IGNITION SYSTEM

High–Tension Cords and Cord Clamps

INSTALLATION OF HIGH–TENSION
CORDS AND CORD CLAMPS

(See Components on page

IG–11

)

1.

INSTALL LOWER HIGH–TENSION CORD COVER
Install the high–tension cord cover with the bolt.

2.

INSTALL RH HIGH–TENSION CORD CLAMPS
(a) Install the cord clamp to the front high–tension cord

clamp.

(b) Install front and rear high–tension cord clamps with the

two bolts.

HINT: Place the front and rear ends of the front high–tension
cord clamp on the rear high–tension cord clamp and lower
high–tension cord cover.

3.

INSTALL LH HIGH–TENSION CORD CLAMPS
(a) Install the cord clamp to the front high–tension cord

clamp.

(b) Install front and rear high–tension cord clamps with the

two bolts.

HINT: Place the front and rear ends of the front high–tension
cord clamp on the rear high–tension cord clamp and lower
high–tension cord cover.

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IGNITION SYSTEM

High–Tension Cords and Cord Clamps

IG–15