2002 Buell S3T: Fuel System 4-95
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THROTTLE POSITION SENSOR 4.35
REMOVAL
1. Remove air cleaner cover and backplate. See 4.41 AIR
CLEANER.
2. Remove throttle body from intake manifold. Note that it is
not necessary to detach intake manifold from cylinder
heads. See 4.40 THROTTLE BODY AND INTAKE MANI-
FOLD.
3. See Figure 4-79. Remove two screws and washers (2)
(metric) to detach TP sensor.
INSTALLATION
1. See Figure 4-79. Attach TP sensor with two screws and
washers (2) (metric).
2. Install throttle body and throttle cables. See 4.40
THROTTLE BODY AND INTAKE MANIFOLD. Do not
install air cleaner backplate at this time.
3. See Figure 4-80. Attach throttle position sensor connec-
tor [88]. Slots on female connector [88B] must fully
engage tabs on male connector housing [88A].
4. Calibrate throttle position sensor using SCANALYZER
(Part No. HD-41325). See CALIBRATION.
CALIBRATION
1. Back out idle cable until screw no longer touches the
throttle plate stop. Back out idle adjuster cable one to two
additional turns.
2. Open and
snap shut
throttle control grip 3-5 times.
3. Install air cleaner backplate and cover. See 4.41 AIR
CLEANER.
4. Attach Scanalyzer (Part No. HD-41325) to data link [91A]
with cable (Part No. HD-42921). See 4.5 SCANALYZER.
5. Turn the ignition/light key switch to IGNITION. Turn the
handlebar mounted Engine Stop Switch to the RUN posi-
tion (but do not start the engine).
6. Calibrate TP sensor using Scanalyzer (Part No. HD-
41325).
a. From Diagnostic Menu, press “7” to display Calibra-
tion Menu.
b. Press “1” to activate TPS Zero Function.
c. Press “Enter” to verify throttle plate is fully closed.
Scanalyzer will then calibrate sensor.
7. Set idle speed.
a. Press the mode key to return to Options Data
Screen. Scroll to TP degrees. Turn idle adjuster
cable clockwise until TP degree reading reaches
5.8.
b. Start engine and bring the engine temperature to a
minimum of 265° F (129.4° C).
c. Set the warm idle speed at 1000-1100 rpm with the
idle adjuster cable.
NOTE
Cold idle start quality is affected by the warm idle setting. The
higher the RPM range that the warm idle is set to, the better
the cold start idle quality will be. High RPM warm idle speed
will also result in cleaner unassisted (not having to roll on the
throttle) cold starts. Do not set the warm idle speed above
1100 RPM.
TP sensor voltage at hot idle will vary according to position of
idle set screw.
8. Disconnect the Scanalyzer and turn the Ignition/Light
Key Switch to OFF or LOCK. Turn the handlebar
mounted Engine Stop Switch to the OFF position.
9. Disconnect Scanalyzer from motorcycle.
Figure 4-79. Throttle Position Sensor
Figure 4-80. Tabs on TP Sensor Connector [88A]
6946
Idle Set
Screw
Throttle
Shaft
Screws
(metric)
TP Sensor
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