Lexus SC300 / Lexus SC400. Service manual - part 580

7. 

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

cover.

8.  DISCONNECT CONTROL CABLES FROM THROTTLE

BODY
Disconnect the following cables:

(1)

Accelerator cable

(2)

A/T throttle cable

(3)

(w/ Cruise Control System)
Cruise control actuator cable

9. 

REMOVE AIR CLEANER AND AIR FLOW METER
(a)  Disconnect the air flow meter connector.
(b)  Loosen the hose clamp holding the air cleaner hose to

the intake air connector.

(c)  Remove the four mounting bolts.
(d)  Disconnect the air cleaner hose from the intake air

connector.

(e)  Disconnect the air duct from the air cleaner case, and

remove the air cleaner and air flow meter assembly.

10. DISCONNECT VACUUM HOSE (A) (FROM PS AIR

CONTROL VALVE) FROM AIR INTAKE CHAMBER

11.  REMOVE INTAKE AIR CONNECTOR

(a)  Disconnect the following hose:

(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 hose clamp.
(d)  Disconnect the intake air connector from the throttle

body, and remove the intake air connector.

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ENGINE MECHANICAL

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EM–119

12. REMOVE RADIATOR RESERVOIR TANK

(a)  Disconnect the coolant level sensor connector.
(b)  Disconnect the following hoses:

(1)  Reservoir hose to water inlet housing
(2)  Reservoir hose to radiator

(c)  Remove the two bolts and reservoir tank bracket.
(d)  Disconnect the reservoir tank from the reservoir tank

bracket, and remove the reservoir tank.

13. REMOVE 

RADIATOR

(a)  Disconnect the water temperature sensor connector.
(b) Disconnect the wire clamp (for water temperature

sensor) from the radiator fan shrould.

(c)  Disconnect the following hoses:

(1)  Two oil cooler hoses (for cooling fan) from pipes

(2)  Two radiator hoses

EM–120

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ENGINE MECHANICAL

Cylinder Block

(3)  Two oil cooler hoses (for A/T) from radiator Plug the

hose ends.

(4)  Suction hose from hydraulic pump
(5)  Pressure hose from hydraulic pump

(c) Remove 

the 

two 

bolts, 

screw 

and 

upper radiator

support. Remove the two upper radiator supports.

(d)  Slightly lift the radiator, and disconnect the two oil cooler

hoses (for cooling fan) from the hose clamp on the
radiator fan shrould.

(e)  Remove the radiator.

14.  DISCONNECT IGNITER CONNECTORS

(a)  Disconnect the two igniter connectors.
(b)  Disconnect the wire clamp from the body.

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ENGINE MECHANICAL

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EM–121

15.  DISCONNECT ENGINE WIRE CONNECTORS

16.  DISCONNECT THEFT DETERRENT HORN CONNECTOR

17.  DISCONNECT GROUND CABLE FROM BODY

18.  DISCONNECT PS SOLENOID VALVE CONNECTOR

19.  DISCONNECT WIRE CLAMP (FOR ALTERNATOR) FROM

VSV (FOR EVAP SYSTEM)
(a)  Remove the two bolts, and disconnect the VSV from the

RH cylinder head.

(b)  Disconnect the wire clamp from the VSV bracket.

20. REMOVE 

ALTERNATOR

(a)  Disconnect the alternator connector.
(b)  Remove the cap and nut, and disconnect the alternator

wire.

(c)  Remove the mounting bolt and nut.
(d)  Disconnect the A/T oil cooler pipe bracket.
(e)  Remove the alternator.

21. DISCONNECT PS TUBES FROM SUSPENSION

CROSSMEMBER
Remove the clamp bolt, and disconnect the PS tubes.

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ENGINE MECHANICAL

Cylinder Block