General - Buell 2008 XB SERIES Electrical Diagnostics Manual

DTC P1501 (45), P1502 (45), P1503 (45)

GENERAL

Side Stand Sensor
The side stand sensor utilizes a Hall effect sensor to monitor
side stand position. When the side stand is fully retracted, the
sensor picks up the presence of the metal tab mounted on the
side stand. When the side stand is extended, the engine will
only start and run if the ECM receives a signal from the neutral
switch indicating that the transmission is in neutral. Otherwise,
the engine will start and stall.
The ECM provides 5V power feed and ground circuits to the
side stand sensor. A signal is sent to the ECM based on side
stand position. This signal allows the ECM to determine
whether the side stand is retracted or extended.
The side stand sensor also has a fail enable mode. This mode
allows the engine to start and run if the system recognizes a
problem with the side stand sensor circuit.
Table 2-71. Code Description
DTC CHECK
ENGINE
LAMP CODE
P1501 45
P1502 45
P1503 45
ed01309
Figure 2-102. Side Stand Sensor
2-130 2008 Buell XB Diagnostics: Engine Management
DESCRIPTION
Side stand sensor low
Side stand sensor high
Side stand down at vehicle
speed 9 MPH (15 km/h) or
greater
ed01310
Figure 2-103. Side Stand Sensor Connector
DIAGNOSTICS
PART NUMBER
HD-39978 DVOM
HD-41404-B HARNESS CONNECTOR TEST KIT
Diagnostic Notes
Each reference number below correlates to a circled number
on the flow chart(s).
1. See the appropriate Buell Service Manual for ECM
replacement.
2. Unplug the neutral switch connector [131]. Using a
DVOM (Part No. HD-39978), test continuity to ground.
When the transmission is in neutral, continuity should exist.
When the transmission is in gear, there should not be
continuity to ground through the neutral switch.
3. When the side stand is retracted, voltage on connector
[11] terminal "34" (gray) should be approximately 1.5-2V.
When the side stand is extended, the voltage on connector
[11] terminal "34" (gray) should be approximately 4-4.5V.
4. Use HARNESS CONNECTOR TEST KIT (Part No. HD-
41404-B), brown male probe and patch cord.
2.34
TOOL NAME