Buell 2008 XB SERIES Electrical Diagnostics Manual page 133

Vehicle Speed Sensor: DTC P0502 (43); DTC P0503 (43); DTC P0608 (37) (Part 3 of 3)
Connect Speedometer Tester (Part No. HD-41354) with the
Input/Output cable supplied (Part No. HD-41354-1) or point to
point leads to VSS connector [65B] terminals "2" (signal) and
"3" (ground). Turn Speedometer Tester power on and allow
the tester to self-test. On the tester, perform the following: 1)
Press the CLEAR button; 2) Press "1"; then 3) Press ENTER.
Enter 4000Hz by pressing "4000" and then ENTER.
Does the speedometer on the instrument module read
YES
Replace Vehicle
Speed Sensor.
Continued from Vehicle Speed Sensor Test, DTC
P0502 (43); P0503 (43); P0608 (37) (Part 2 of 3).
Remove Vehicle Speed Sensor connector [65B].
With the ignition switch ON, check the voltage
between connector [65] terminals "1" (+) and "3" (-).
Is voltage 5.0V (nominal)?
YES
70MPH?
NO
Locate and repair open on
(W) wire between connector [78B]
terminal "13" and connector [65B]
terminal "2".
If wiring is OK, replace ECM.
Locate and repair open between [78B]
terminal "25" and connector [65B] terminal
"1" (R/W) or [78B] terminal "28" and
connector [65B] terminal "3" (BK/W).
If wiring is OK, replace ECM.
NOTE:
After replacing ECM, the TPS zero-set
procedure must be performed. Refer to
THROTTLE POSITION SENSOR in the
appropriate BUELL SERVICE MANUAL.
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2008 Buell XB Diagnostics: Engine Management 2-83
NO