Lexus SC300 / Lexus SC400. Manual - part 352

(e)  Connect the following connectors:

(1)  Throttle position sensor connector
(2) w/ 

TRAC:

Sub–throttle position sensor connector

(3) w/ 

TRAC:

Sub–throttle actuator connector

27. REINSTALL 

HEATER 

WATER 

VALVE

(a)  Install the water valve and bracket assembly with the 2 bolts.
(b)  Install the engine wire clamp with the bolt.
(c)  Connect the VSV connector.

28.  REINSTALL RH NO.3 TIMING BELT COVER
(a)  Install the 3 gaskets to the timing belt cover.
(b)  Fit the portion A of the timing belt cover, matching it with the

lower high–tension cord cover.

(c)  Install the timing belt cover with the 3 bolts.

29.  REINSTALL VSV FOR EVAP SYSTEM

Install the VSV with the 2 bolts.

30.  REINSTALL LH NO.3 TIMING BELT COVER
(a)  Install the 3 gaskets to the timing belt cover.
(b)  Install the cord grommet to the high–tension cord (from the

LH ignition coil).

(c)  Install the cord grommet to the timing belt cover.
(d)  Fit the portion A of the timing belt cover, matching it with the

lower high–tension cord cover.

(e)  Install the timing belt cover with the 4 bolts.

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EG–29

31.  RECONNECT FUEL INLET HOSE TO LH DELIVERY PIPE
(a)  Temporarily connect the fuel inlet hose to the delivery pipe

with 2 new gaskets and pulsation damper.

(b)  Using SST, tighten the pulsation damper.

SST 09631–22020

Torque:

39 N

⋅

m (400 kgf

⋅

cm, 29 ft

⋅

lbf)

33 N

⋅

m (340 kgf

⋅

cm, 24 ft

⋅

lbf) for SST

HINT: Use a torque wrench with a fulcrum length of 30 cm
(11.81 in.).

32.  RECONNECT FUEL RETURN HOSE TO FUEL RETURN

PIPE

33.  RECONNECT PCV HOSE TO LH CYLINDER HEAD

34.  REINSTALL RH ENGINE WIRE COVER
(a)  Fit portions A and B of the engine wire cover, matching them

with the lower high–tension cord cover and No.3 timing belt
cover.

(b)  Install the timing belt cover with the bolt.

35.  REINSTALL LH ENGINE WIRE COVER
(a) Connect 

portions A and B of the engine wire cover to the wire

brackets.

(b)  Set the VSV (for the fuel pressure) wire in original position.
(c)  Fit portions C and D of the engine wire cover, matching them

with the lower high–tension cord cover and No.3 timing belt
cover.

(d)  Install the timing belt cover with the 2 bolts.

36.  REINSTALL UPPER HIGH–TENSION CORD COVER
(a)  Fit portion A of the upper high–tension cord cover matching

the top of the lower high–tension cord cover.

EG–30

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ENGINE MECHANICAL

(b)  Push the front side of the upper high–tension cord cover, and

fit the front side claw groove of the upper high–tension cord
cover to the claw of the lower high –tension cord cover.

(c)  Install the upper high–tension cord cover with the 2 bolts.

37.  REINSTALL INTAKE AIR CONNECTOR
(a)  Connect the end portions of the intake air connector to the

throttle body and air cleaner hose.

(b)  Tighten the 2 hose clamps
(c)  Install the bolt holding the intake air connector to the cylinder

head cover.

(d)  Connect the following hoses:

(1)  Air hose to IAC valve
(2) Air 

hose (from air control valve on PS pump) to intake air

connector

38.  RECONNECT CONTROL CABLES TO THROTTLE BODY

Connect the following cables:
(1) Accelerator 

cable

(2)  Transmission throttle control cable
(3)  Cruise control actuator cable

39.  REINSTALL THROTTLE BODY COVER
(a)  Install the throttle body cover and hose clamp with the cap nut

and 2 bolts.

(b)  Install the EVAP hose to the hose clamp.

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EG–31

40. RECONNECT NEGATIVE TERMINAL CABLE TO

BATTERY

41.  REFILL WITH ENGINE COOLANT
42.  START ENGINE AND CHECK FOR LEAKS

EG21T–02

IGNITION TIMING INSPECTION

1. 

REMOVE UPPER HIGH–TENSION CORD COVER

(a)  Remove the 2 bolts.
(b) Disconnect 

the front side claw groove of the upper cord cover

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

2. 

WARM UP ENGINE
Allow the engine to warm up to normal operating tempera-
ture.

3. CONNECT 

TACHOMETER 

AND 

TIMING 

LIGHT 

TO

ENGINE
Connect the tester probe of a tachometer to terminal IG

 of

the DLC1.
HINT: Set the tachometer to the 4–cylinder range.

NOTICE:

•

Never allow the tachometer terminal to touch ground as

it could result in damage to the igniter and/or ignition

coil.

•

As some tachometers are not compatible with this

ignition system, we recommend that you confirm the

compatibility of your unit before use.

4. 

INSPECT IGNITION TIMING

(a)  Using SST, connect terminals TE1 and E1 of the DLC 1.

SST 09843–18020

EG–32

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