Lexus GS300/400 (2000 year). Manual - part 211

SF0NO–05

B02816

B02692

30

°

(3)

(2)

B01951

Turn

(3)

(2)

–

SFI (2JZ–GE)

THROTTLE BODY

SF–37

1503

REPLACEMENT

NOTICE:

To prevent deterioration, do not shock the throttle
position sensor and accelerator pedal position sen-
sor.

Mixing of the foreign objects may cause the gear lock-
ing, so thoroughly check that there is no stuck of any
foreign objects and clean up if any.

1.

REPLACE THROTTLE POSITION SENSOR

(a)

Remove the 2 set screws and throttle position sensor.

(b)

Reinstall the throttle position sensor.
(1)

Check that the throttle valve is under the condition
of the opener opening angle (about 

3.5°

).

(2)

Install the sensor to the place where is at 30

°

 ro-

tated to the right from the specified installation posi-
tion.

(3)

Gradually turn sensor counterclockwise until it
touches the throttle valve shaft and temporarily
torque the 2 set screws.

(c)

Adjust the throttle position sensor.
(1)

Connect the throttle position sensor connector.

NOTICE:
At this time, do not connect the throttle control motor con-
nector.

(2)

Connect the LEXUS hand–held tester or OBDII
scan tool to the DLC3.

(3)

Turn the ignition switch ON.

NOTICE:
After turning the ignition switch ON, do not depress the ac-
celerator pedal.

(4)

While reading the value of the throttle valve opening
percentage (THROTTLE POS) of the CURRENT
DATA, turn the throttle position sensor slowly to left
and set the sensor at the center value of the stan-
dard value, and then torque the screws.

Torque: 1.7 N·m (17.5 kgf·cm, 15 in.·lbf)
Standard throttle valve opening percentage:
14.8 

±

 0.8 %

B01953

B01811

”A”

Turn

SF–38

–

SFI (2JZ–GE)

THROTTLE BODY

1504

NOTICE:
At the time of tightening the screw, as the sensor itself
tends to turn causing  to slanting, check that it is within the
standard value after having finished the torque.

(5)

Fully close the throttle valve with a screwdriver and
check that the value of the throttle valve opening
percentage (THROTTLE POS) of the CURRENT
DATA stays with the standard value.

Standard throttle valve opening percentage:
10 – 14 %

If the throttle valve opening percentage is not as specified, re-
peat steps (4) through (5).

(6)

Paint the sensor set screws.

(7)

Turn the ignition switch OFF.

(8)

Disconnect the LEXUS hand–held tester or OBDII
scan tool from the DLC3.

(9)

Disconnect the throttle position sensor connector.

2.

REPLACE THROTTLE CONTROL MOTOR

(a)

Remove the throttle position sensor.

(b)

Remove the throttle control motor.
(1)

Disconnect the connector from the bracket.

(2)

Remove the 5 screws, bracket and cover.

(3)

Remove the 3 screws and throttle control motor.

(c)

Reinstall the throttle control motor.
(1)

Apply the grease thinly on the whole surface of the
gear teeth.

NOTICE:
Do not apply the grease other than specified because
grease has been already applied to the component to be re-
placed.

(2)

Align the protrusions of the motor with the position-
ing pin holes of the throttle body.

(3)

Rotate the motor to the direction marked with an ar-
row and temporarily install the set screw ”A” under
the condition that there is no wobbles in the motor
and the positioning pin.

(4)

Tighten the 3 set screws.

Torque: 3.7 N·m (37.5 kgf·cm, 33 in.·lbf)

B01952

”C”

”B”

Bracket

B02943

1

Closely Affix

3

4

2

–

SFI (2JZ–GE)

THROTTLE BODY

SF–39

1505

(5)

Temporarily install the cover with the 2 screws ”B”
and ”C”.

NOTICE:
The grommet of motor not be caught.

(6)

Tighten the 5 screws.

Torque: 1.7 N·m (17.5 kgf·cm, 15 in.·lbf)
(7)

Connect the connector to the bracket.

(d)

Reinstall and adjust the throttle position sensor. (See step
1)

3.

REPLACE ACCELERATOR PEDAL POSITION SEN-
SOR

(a)

Remove the accelerator pedal position sensor.
(1)

Using a small screwdriver, pry the 4 stoppers of the
washer plate.

(2)

Remove the 4 set bolts, washer plate and accelera-
tor pedal position sensor.

(b)

Reinstall the accelerator pedal position sensor.
(1)

Install the accelerator pedal position sensor to the
throttle body.

(2)

Torque the 4 bolts in the order shown in the illustra-
tion through the washer plate.

Torque: 3.7 N·m (37.5 kgf·cm, 33 in.·lbf)
(3)

Bend the stopper of the washer plate and closely af-
fix to the bolts.

(c)

Inspect the accelerator pedal position sensor.
(1)

Connect the accelerator pedal position sensor con-
nector.

(2)

Connect the LEXUS hand–held tester or OBDII
scan tool to the DLC3.

(3)

Turn the ignition switch ON.

NOTICE:
After turning the ignition switch ON, do not depress the ac-
celerator pedal.

(4)

Check that the ACCEL POS #1 (VPA) voltage of the
CURRENT DATA shows the standard value.

Standard accelerator pedal position voltage:
0.3 – 0.9 V

4.

AFTER INSTALL THROTTLE BODY, INSPECT SYS-
TEM OPERATION (See page 

SF–32

)

SF0NP–01

SF–40

–

SFI (2JZ–GE)

THROTTLE BODY

1506

INSTALLATION

Installation is in the reverse order of removal. (See page 

SF–36

)