Buell 2003XB9S Service Manual page 407

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ENGINE TEMPERATURE SENSOR
GENERAL
See Figure 4-76. The Engine Temperature Sensor (ET Sen-
sor), located in the rear cylinder head, monitors the engine
temperature close to the combustion chamber. In addition to
aiding the ECM in monitoring the operation of the engine, it is
also used to warn the operator of potentially damaging tem-
peratures by causing the CHECK ENGINE lamp to blink dur-
ing operation.
REMOVAL
1 1
WARNING WARNING
To protect against accidental start-up of vehicle, discon-
nect the negative battery cable before proceeding. Inade-
quate safety precautions could result in death or serious
injury.
1. Disconnect negative battery cable.
2. Remove intake cover assembly. See
COVER ASSEMBLY.
3. Remove airbox. See 4.43
4. See Figure 4-77. Remove right upper tie bar fastener (2).
Rotate tie bar to provide access to sensor.
CAUTION
Do not pull on engine temperature sensor wiring. Excess
strain to sensor wiring will cause sensor damage.
5. Unplug 1-place ET Sensor connector (1) [90] above rear
cylinder head.
6. Slide rubber boot up ET sensor wire.
7. Remove sensor from rear cylinder head using Snap-on
socket M3503B.
4-98 2003 Buell XB9S: Fuel System
2.35 INTAKE
AIRBOX.
b0801x4x
Figure 4-76. Engine Temperature Sensor Location (rear
cylinder)
8425a
1. Engine temperature sensor connector [90]
(approximate location)
2. Upper tie bar fastener (right side)
Figure 4-77. Engine Temperature Sensor Connector
Approximate Location [90]
4.33
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2