Lexus ES300 (1997 year). Manual — part 524

SF060–01

SF–30

–

SFI

MASS AIR FLOW (MAF) METER

881

1997 LEXUS ES300 (RM511U)

INSTALLATION

Installation is in the reverse order of removal (See page

SF–28

).

S04593

SF061–04

S04536

Vacuum

VTA

E2
VC

Ohmmeter

S04604

Plug

Disconnect

–

SFI

THROTTLE BODY

SF–31

882

1997 LEXUS ES300 (RM511U)

THROTTLE BODY

ON–VEHICLE INSPECTION

1.

INSPECT THROTTLE BODY

Check that the throttle linkage moves smoothly.

2.

INSPECT THROTTLE POSITION SENSOR

(a)

Apply vacuum to the throttle opener.

(b)

Disconnect the sensor connector.

(c)

Using an ohmmeter, measure the resistance between
each terminal.

Throttle valve

condition

Between

terminals

Resistance

Fully closed

VTA – E2

0.2 – 5.7 k

Ω

Fully open

VTA – E2

2.0 – 10.2 k

Ω

–

VC – E2

2.5 – 5.9 k

Ω

(d)

Reconnect the sensor connector.

3.

INSPECT THROTTLE OPENER

(a)

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

(b)

Check idle speed.
Idle speed: 700

±

50 rpm

(c)

Disconnect the vacuum hose from the throttle opener,
and plug the hose end.

(d)

Check the throttle opener setting speed.
Throttle opener setting speed: 900 – 1,950 rpm

If the throttle opener setting is not as specified, replace the
throttle body.
(e)

Stop the engine.

(f)

Reconnect the vacuum hose to the throttle opener.

(g)

Start the engine and check that the idle speed returns to
the correct speed.

SF062–02

S05671

EGR Gas Temperature
Sensor Bracket

Gasket

Throttle Body

Throttle Position
Sensor Connector

IAC Valve Connector

Water Bypass Hose

Air Assist Hose

Water Bypass Hose

Air Cleaner Hose

Accelerator Cable

Throttle Cable

N·m (kgf·cm, ft·lbf)

Non–reusable part

: Specified torque

19.5 (200, 14)

SF–32

–

SFI

THROTTLE BODY

883

1997 LEXUS ES300 (RM511U)

COMPONENTS

SF063–02

S05630

S06123

(3)

(1)

(a)

(b)

(2)

S04527

EGR Gas Temperature
Sensor Bracket

–

SFI

THROTTLE BODY

SF–33

884

1997 LEXUS ES300 (RM511U)

REMOVAL

1.

DRAIN ENGINE COOLANT

2.

DISCONNECT ACCELERATOR CABLE

3.

DISCONNECT THROTTLE CABLE

4.

REMOVE AIR CLEANER HOSE

(a)

Disconnect the PCV hose.

(b)

Loosen the 2 hose clamps, and remove the air cleaner
hose.

5.

REMOVE THROTTLE BODY

(a)

Disconnect the throttle position sensor connector.

(b)

Disconnect the IAC valve connector.

(c)

Disconnect these hoses:
(1)

Water bypass hose (from intake manifold)

(2)

Water bypass hose (from water inlet housing)

(3)

Air assist hose

(d)

Remove the 2 bolts, 2 nuts, EGR gas temperature sensor
bracket, throttle body and gasket.

HINT:
At the time of installation, please refer to the following item.
Place a new gasket on the air intake chamber.

Torque: 19.5 N·m (200 kgf·cm, 14 ft·lbf)