Lexus SC300 / Lexus SC400. Manual — part 602

REMOVAL OF COLD START INJECTOR

(See Components on page

FI–26

)

1.

DISCONNECT CABLE FROM NEGATIVE TERMINAL OF
BATTERY
CAUTION: Work must be started after approx. 20 se-
conds or longer from the time the ignition switch is
turned to the ”LOCK” position and the negative (–) termi-
nal cable is disconnected from the battery.

2.

DRAIN ENGINE COOLANT (See page

CO–6

)

3.

REMOVE THROTTLE BODY COVER
(a) Remove the mounting cap nut.
(b) Loosen the two bolts, and remove the throttle body

cover.

4. DISCONNECT CONTROL CABLES FROM THROTTLE

BODY
Disconnect the following cables:

(1) Accelerator

cable

(2) A/T throttle control cable
(3) (w/ Cruise Control System)

Cruise control actuator cable

5.

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 intake air
connector.

FI–27

EFI SYSTEM – Fuel System (Cold Start Injector)

6.

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.

7.

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

8.

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

9.

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

10. REMOVE RH NO.3 TIMING BELT COVER

Remove the three bolts and timing belt cover.

FI–28

EFI SYSTEM – Fuel System (Cold Start Injector)

11. 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.

12. REMOVE LOWER HIGH–TENSION CORD COVER

(a) Disconnect the high–tension cord from the RH ignition

coil.

(b) Disconnect the high–tension cords from the

high–tension cord cover.

(c) Remove the bolt and cord cover.

13. REMOVE THROTTLE BODY

(a) Disconnect the following connectors:

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

TRAC)

Sub–throttle position sensor connector

(3) (w/

TRAC)

Sub–throttle actuator connector

(b) Disconnect the following hoses:

(1) Heater water hose from heater water valve

FI–29

EFI SYSTEM – Fuel System (Cold Start Injector)

(2) Water by–pass hose from ISC valve
(3) (USA

Spec.)

Vacuum hose

(4) (Exc. USA Spec.)

Three vacuum hoses

(c) Remove the two bolts and two nuts, disconnect the

throttle body from the air intake chamber.

(d) Disconnect the following hoses, and remove the throttle

body:

(1)

PCV hose from throttle body

(2)

Water by–pass hose from throttle body

(e) Remove the throttle body gasket.

14. DISCONNECT

CONNECTORS

Disconnect the following connectors:

•

Cold start injector connector

•

ISC valve connector

•

(USA Spec.)
EGR valve connector for EGR system

•

(Exc. USA Spec.)
VSV connector for EGR

•

VSV connector for fuel pressure control system

FI–30

EFI SYSTEM – Fuel System (Cold Start Injector)