Buell XB9R 2003 Service Manual page 395

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ENGINE TEMPERATURE SENSOR
GENERAL
The Engine Temperature Sensor (ET Sensor), 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 temperatures by causing
the CHECK ENGINE lamp to blink during 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 4-188. 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 XB9R: Fuel System
2.34 INTAKE
AIRBOX.
b0801x4x
Figure 4-187. Engine Temperature Sensor Location (rear
cylinder)
8425a
1. Engine temperature sensor connector [90]
(approximate location)
2. Upper tie bar fastener (right side)
Figure 4-188. Engine Temperature Sensor Connector
Approximate Location [90]
4.33
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