Lexus SC300 / Lexus SC400. Manual - part 607

4. 

INSTALL UPPER HIGH–TENSION CORD COVER
(a)  Fit portion A of the upper high–tension cover, matching

it with the top of the lower high–tension cord cover.

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

connect 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 two

bolts.

5. 

INSTALL INTAKE AIR CONNECTOR
(a)  Connect the end portions of the intake air connector to

the throttle body and air cleaner hose.

(b)  Tighten the two 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 ISC valve
(2) Air 

hose (from PS air control valve) to intake air con-

nector

6.  CONNECT CABLE TO NEGATIVE TERMINAL OF

BATTERY

7. 

CHECK FOR FUEL LEAKS (See page 

FI–16

)

FI–47

EFI SYSTEM   –   Fuel System (Fuel Pressure Regulator)

Injectors

ON–VEHICLE INSPECTION

INSPECT INJECTOR RESISTANCE

(a)  Remove the engine wire covers and throttle body.

(See steps 1 to 8 and 13 on pages 

FI–27

 to 30)

(b)  Disconnect the injector connectors.
(c)  Using an ohmmeter, measure the resistance between

the terminals.

Resistance: 13.4–14.2 

If the resistance is not as specified, replace the injector.
(d)  Reconnect the injector connectors.
(e)  Reinstall the throttle body and engine wire covers.

(See steps 5 and 10 to 18 on pages 

FI–38

 to 41)

FI–48

                –   Fuel System (Injectors)

EFI SYSTEM

COMPONENTS FOR REMOVAL AND INSTALLATION

FI–49

EFI SYSTEM   –   Fuel System (Injectors)

REMOVAL OF INJECTORS

(See Components on page 

FI–49

)

1. 

REMOVE AIR INTAKE CHAMBER
(See steps 1 to 16 on pages 

FI–27

 to 32)

2. 

DISCONNECT FUEL INLET HOSE FROM LH DELIVERY
PIPE
Remove the pulsation damper and two gaskets, and discon-
nect the inlet hose.

3.  DISCONNECT FUEL RETURN HOSE FROM FUEL

RETURN PIPE

4. 

DISCONNECT EGR PIPE FROM RH CYLINDER HEAD
Remove the bolt holding the EGR pipe to the cylinder head,
and disconnect the EGR pipe.

5. 

DISCONNECT ENGINE WIRE FROM INTAKE MANIFOLD
Remove the two bolts, and disconnect the engine wire.

6.  DISCONNECT ENGINE WIRE FROM DELIVERY PIPES

AND REAR WATER BY–PASS JOINT
(a)  Remove the four bolts holding the engine wire to the

delivery pipes, and disconnect the engine wire from the
delivery pipes.

(b) Remove 

the two bolts holding the engine wire to the rear

water by–pass joint, and disconnect the engine wire
from the rear water by–pass joint.

(c) Remove 

the two bolts holding the engine wire to the rear

side of the RH cylinder head, and disconnect the engine
wire from the RH cylinder head.

FI–50

EFI SYSTEM   –   Fuel System (Injectors)