Buell 2008 XB SERIES Electrical Diagnostics Manual page 192

Tachometer: DTC P1653 (35); DTC P1634 (35)
Clear DTCs and confirm proper operation with no
check engine lamp. Codes can be cleared using
DIGITAL TECHNICIAN (Part No. HD-44750).
After replacing ECM or TPS, TPS zero set
procedure must be performed. Refer to
THROTTLE POSITION SENSOR in the
appropriate Buell Service Manual.
2-142 2008 Buell XB Diagnostics: Engine Management
Attach Breakout Box (B-48115), but leave
connector [10] (BK) unplugged at the Electronic
Control Module (ECM).
1
Disconnect Instrument Module connector [39]
with Ignition Switch ON. Measure voltage
2
across terminal "22" (+) and terminal "24" (-) of
Breakout Box connector [10] (Black).
Is battery voltage present?
YES
Locate and repair
short on (PK) wire
to voltage.
NOTES:
Reconnect connector [39].
wiggle test. See 2.7 WIGGLE
NO
Check for continuity at Breakout Box connector
[10] (Black) terminals "22" and "24".
Is continuity present?
YES
Reconnect connector [10] (BK).
Connect DVOM to Breakout
Locate and repair
Box connector [10] (Black)
short on (PK) wire
terminals "22" and "24". Start
to ground.
Does voltage measure
approximately 4.0-6.0 volts?
YES
Locate intermittents using
TEST.
Intermittents found?
YES
Replace Instrument Module.
Repair.
MODULE in the appropriate
Buell Service Manual.
NO
engine and let idle.
NO
Replace
ECM.
NO
See INSTRUMENT
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