Buell 2008 XB SERIES Electrical Diagnostics Manual page 80

Check Engine Lamp On Continuously
With Ignition Switch OFF, reconnect ECM
connector [10] (Black). With Ignition
Switch ON, verify that there is NOT a 4
second check engine lamp OFF period.
Is there a check engine lamp OFF period?
Check engine lamp
function OK. Check for
trouble codes. See
CHECKING FOR
TROUBLE CODES.
2-30 2008 Buell XB Diagnostics: Engine Management
Turn Ignition Switch OFF. Disconnect
1
Electronic Control Module (ECM) connector [10] (Black). Turn
Ignition Switch ON. Check engine lamp should be OFF.
YES
YES
After replacing ECM or TPS, the TPS zero
set procedure must be performed. Refer to
THROTTLE POSITION SENSOR in the
appropriate BUELL SERVICE MANUAL.
Is it?
Disconnect Instrument Module
connector [39]. Remove (BK/
Y) wire from connector [39A].
Check engine lamp ON?
NO YES
Replace
Replace
Instrument
ECM.
Module.
NOTE:
NO
Reconnect [39].
NO
Repair short to
ground on (BK/Y)
wire between
connector [39] and
connector [10]
(Black).
fc00371_en