Buell 2007 LIGHTNING Service Manual

4-64 2007 Buell Lightning: Fuel System
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TROUBLE CODE 21 4.21
GENERAL
The interactive exhaust system utilizes an actuator valve in
the muffler which is connected to a servo motor via a cable.
The valve position automatically adjusts to enhance engine
performance.
Active Muffler Control (XB12 Models Only)
A Code 21 will set if the ECM detects that the output for the
Interactive Muffler Control Actuator is not in agreement with
the feedback circuit.
● Mechanical fault in the actuator, valve or cable.
● Electrical fault in the actuator circuit.
● Electrical fault in the actuator feedback circuit.
● Electrical fault in the brake light or horn circuits.
● Blown fuse.
See B.5 INDEX TO WIRING DIAGRAMS.
DIAGNOSTIC NOTES
The reference numbers below correlate with the circled num-
bers on the Code 21 flow charts.
1. Using TEST CONNECTOR KIT (Part No. HD-41404),
attach red probe and patch cord to [164B].
2. Using TEST CONNECTOR KIT (Part No. HD-41404),
use gray male pin probe and patch cord.
Figure 4-45. Fuses and Diodes
39
40
41
42
43
44
33
34
35
36
37
38
21
22
23
24
25
26
28
29
30
31
32
27
Spare
Diode
Bk/Hn/Mflr
Fan
IGN
Acces.
Key Sw
Lights
ECM
Spare
E mpt y
B a tt e r y
bs0026xx

Buell 2007 LIGHTNING Specifications

General

Year	2007
Manufacturer	Buell
Model	Lightning
Category	Motorcycle
Displacement	1203 cc
Bore x Stroke	88.9 mm x 96.8 mm
Compression Ratio	10.0:1
Fuel System	Electronic fuel injection
Transmission	5-speed
Final Drive	Belt
Rear Suspension	Showa shock absorber
Rear Brakes	Single disc, 1-piston caliper
Engine Type	V-Twin
Ignition	Digital
Front Suspension	Showa inverted fork
Front Brakes	Single disc, 6-piston caliper
Front Tire	120/70 ZR17
Rear Tire	180/55 ZR17
Wheelbase	52.0 inches
Seat Height	30.1 inches
Dry Weight	395 lbs
Fuel Capacity	14.5 liters