Buell 2008 XB SERIES Electrical Diagnostics Manual page 84

Engine Cranks But Will Not Start (Part 2 of 3)
Disconnect fuel injector
connector and attach Fuel
4 Injector Test Lamp (HD-
34730-2C). Crank engine.
Does lamp flash?
YES
Check engine
compression.
See appropriate
BUELL
SERVICE
MANUAL.
Inspect Spark Plugs.
Are plugs good?
YES
Replace
Ignition Coil.
2-34 2008 Buell XB Diagnostics: Engine Management
Continued from Engine Cranks but Will Not
Start Test (Part 1 of 3).
3 Check spark plug condition. Replace if fouled.
Check spark at both plugs while cranking.
Is spark present?
YES
NO
1
See 2.21 DTC
6
P0261 (23),
P0262 (23),
P0264 (32),
P0265 (32).
Front Coil: Insert test lamp
between ECM terminal "9"
(Black) and "25" (Black),
then between terminals "9"
and "34" of Breakout Box.
Does test lamp flash when
engine is cranked?
YES
Check ignition coil
connections.
Are connections OK?
YES
NO
Test Spark Plug
Repair.
Cable resistance.
See 2.16 MISFIRE
Test.
Resistance OK?
YES NO
Replace Spark
Plug Cables.
NO
Replace
Spark Plugs.
Using DVOM, check for battery
voltage at ignition coil [83]
5 terminal "2".
Power present after Ignition
Switch is ON?
YES
Connect Breakout Box to the Electronic
Control Module (ECM) and use test
adapters for following inspection.
Rear Coil: Insert test lamp
between ECM terminal "9"
(Black) and "31" (Black), then
between terminals "9" and
"32" of Breakout Box.
Does test lamp flash when
engine is cranked?
Check continuity between ignition coil
connector [83] terminal "1" and ECM
connector [10] (Black) terminals "31"
Check continuity between ignition coil
connector [83] terminal "3" and ECM
connector [10] (Black) terminals "25"
Is resistance less than 1.0 ohm?
YES
STOP
Go to Engine
Cranks but Will
Not Start Test
(Part 3 of 3).
NO
NO
Open in (GY) wire
between splice for fuel
pump wire and Ignition
Coil. Repair open.
NO
and "32".
and "34".
NO
7
Poor connection at
connector [10B], [83]
or open in harness
between coil and
ECM. Repair open.
fc00373_en