Buell 2008 XB SERIES Electrical Diagnostics Manual page 131

Vehicle Speed Sensor: DTC P0502 (43); DTC P0503 (43); DTC P0608 (37) (Part 1 of 3)
NOTE:
Ensure all system fuses are
good before performing this test.
YES
Check the trip 1 and trip
2 odometer readings.
Do readings reflect
correct mileage?
YES
While observing trip 1 or
trip 2 odometer readings,
press reset button for 5
seconds, minimum.
Does reading reset to
zero?
YES
STOP
Go to Vehicle Speed
Sensor Test, DTC P0502
(43); P0503 (43); P0608 (37)
(Part 2 of 3)
Does instrument module perform sweep test?
YES
Check odometer reading.
Does odometer display correct vehicle mileage?
NO
STOP
Go to Vehicle Speed
Sensor Test, DTC P0502
(43); P0503 (43); P0608 (37)
(Part 2 of 3)
NO
STOP
Go to Vehicle Speed
Sensor Test, DTC P0502
(43); P0503 (43); P0608 (37)
(Part 2 of 3)
NO
Replace instrument module.
Clear DTCs and confirm proper
operation with no check engine lamp.
DTCs can also be cleared with a Digital
Technician (Part No. HD-44750).
Turn Ignition switch to ON.
Check for battery voltage between IM
connector [39B] terminals "12"' POS (R/
BK) and "13" GND (BK).
Is battery voltage present?
YES
Replace
Instrument
Module
Ride motorcycle for
approximately 1.0 mile (1.6 km).
Check for speedometer function.
Speedometer functioning
properly?
NO
YES
System OK.
STOP
Go to Vehicle Speed
Sensor Test, DTC P0502
(43); P0503 (43); P0608 (37)
(Part 2 of 3)
YES
Replace ignition
switch.
2008 Buell XB Diagnostics: Engine Management 2-81
NO
NO
Check for continuity between
IM connector [39B] terminal
"13" and GND (vehicle frame).
Is continuity present?
YES NO
Locate and
repair open wire
(BK).
Check for battery voltage from
ignition switch connector [39B]
terminals "1" and "4" (+) and
ground (-)
Is battery voltage present?
NO
Locate and repair
open circuit between
IM connector [39B]
terminal "12" (R/BK)
and ignition switch
connector [39B]
terminal "3" (R/BK).
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