Buell XB9R 2003, Service Manual, Page: 383 / 566

4-86 2003 Buell XB9R: Fuel System
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Code 56 (Part 1 of 2)
Attach Breakout Box (HD-42682). Disconnect cam position
sensor connector [14]. Turn ignition ON.
Connect voltmeter across Terminal A (R/W wire) and Terminal
C (BK/W wire) of connector [14]. Is voltage 4.75-5.25 VDC?
YES NO
Measure the voltage between
Pin 1 and Pin 7 on [11] (GY) using Breakout
Box. Is voltage 4.75-5.25 VDC?
Go to Code 56
(Part 1 of 2).
YES NO
Measure continuity between
Pin A on [14] and Pin 1 on [11].
Continuity present?
Disconnect harness side connector [11B]
(GY) from Breakout Box. Measure voltage
between Pin 1 and Pin 7 of
connector [11]. Voltage present?
NO.
Repair open in
R/W wire between
connectors [11] and
[14].
NO
Repair open in
BK/W wire between
connectors [11] and
[14].
YES. YES.
12 volts
Locate and repair
R/W wire short
to voltage.
Locate and repair
R/W wire short
to ground.
YES.
5 volts.
STOP
Replace ECM. See
4.29 ELEC-
TRONIC CON-
TROL MODULE .
1
2
2
7945 7945
7970 7955
7965
Clear codes and confirm proper operation with no
check engine lamp. Codes can be cleared using
DIGITAL TECHNICIAN (Part No. HD-44750).