General - Buell 2008 XB SERIES Electrical Diagnostics Manual

DTC P0261 (23), P0262 (23), P0264 (32), P0265
(32)

GENERAL

Front and Rear Fuel Injectors
See Figure 2-55. The fuel injectors are solenoids that allow
pressurized fuel into the engine intake tract. The fuel injectors
are timed to the engine cycle and are triggered sequentially.
Front and rear fuel injectors are not interchangeable due to
specific spray patterns designed for the engine.
The power for the fuel injectors comes from the ignition relay.
The ignition relay also provides power for fuel pump, Electronic
Control Module (ECM) and the ignition coil. The ECM provides
the path to ground to trigger the fuel injectors.
Ignition relay failure or wiring harness problems will cause 12
volt power to be lost to both fuel injectors, ignition coil, ECM
and fuel pump.
Table 2-37. Code Description
DTC CHECK
ENGINE
LAMP CODE
P0261 23
P0262 23
P0264 32
P0265 32
2-70 2008 Buell XB Diagnostics: Engine Management
NOTE
NOTE
DESCRIPTION
Front fuel injector circuit low
Front fuel injector circuit high
Rear fuel injector circuit low
Rear fuel injector circuit high
ed01300
Figure 2-55. Fuel Injectors
DIAGNOSTICS
PART NUMBER
B-48115 BREAKOUT BOX
HD-34730-2C FUEL INJECTOR TEST LAMP
HD-41404-B HARNESS CONNECTOR TEST KIT
Diagnostic Notes
Each reference number below correlates to a circled number
on the flow chart(s).
Gasoline can drain from the fuel line when disconnected
from carburetor. Gasoline is extremely flammable and
highly explosive, which could result in death or serious
injury. Wipe up spilled fuel immediately and dispose of
rags in a suitable manner. (00257a)
1. Purge fuel line. See FUEL PUMP in the appropriate Buell
Service Manual.
2. Use HARNESS CONNECTOR TEST KIT (Part No. HD-
41404-B), purple pin probes and patch cord.
3. Connect BREAKOUT BOX (Part No. B-48115) to ECM.
See 2.6 BREAKOUT BOX.
4. Use FUEL INJECTOR TEST LAMP (Part No. HD-34730-
2C).
2.21
TOOL NAME