Buell 2006LIGHTNING MODELS, Service Manual, Page: 400 / 638

4-58 2006 Buell Lightning: Fuel System
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Code 15 Test (Part 1 of 2)
1
Go to Code 15 Test
(Part 2 of 2).
Connect Breakout Box to connector [11] leaving ECM disconnected. With
engine at room temperature (68-86°F [20-30° C]), use a DVOM to measure resistance
across
Pin 10 of [11] and Pin 7 of [11] on the Breakout Box.
YES
Connect ECM to Breakout Box. Check for
intermittents by performing 4.7 WIGGLE
TEST . Intermittents present?
YES
While wiggling harness to locate source of
intermittents, perform the steps under Code
15 Test (Part 2 of 2) marked by
Bold Asterisks. Repair as necessary.
NO
Disconnect IAT sensor connector. Turn
ignition switch ON. Using a DVOM,
measure the voltage between
ECM Pin 10 (+) and Pin 7 (-) of [11]
on Breakout Box.
Is the voltage approximately 5 volts?
YES NO
Less than
4.7 volts
NO
Greater than
5.3 volts.
Replace IAT sensor ( 4.36
INTAKE AIR TEMPERATURE
SENSOR ), clear codes and road
test. Did check engine lamp
come on and set only CODE 15?
With IAT sensor disconnected, dis-
connect ECM connector [11]. Mea-
sure resistance between ECM
Pin 10 of [11] and Pins 2 and 11
of [10]. Is resistance less than 1
megaohm?
Unplug ECM leaving Breakout Box
connected at vehicle harness.
Measure voltage between ECM
Pin 10 of [11] and Pin 2 of [10] on
Breakout Box.
Is the voltage 0 volts?
Install original IAT
sensor, replace
ECM and road test.
YES
System OK.
YES
Examine IAT signal
wire (Lt. GN/Y) for
short to 12 volts
and repair.
NO NO
At some point in the flow chart you may be instructed
to jump directly to the box marked by an asterisk. Dis-
regard the asterisk (but not the instruction box) if your
normal progression through the chart brings you to
this location.
STOP
Replace ECM. See
4.30 ELECTRONIC
CONTROL MODULE .
Replace ECM. See
4.30 ELECTRONIC
CONTROL MODULE .
Repair short to
ground on
Lt. GN/Y wire.
YES
NO
NO
Clear codes and confirm proper operation with no
check engine lamp. Codes can be cleared using
DIGITAL TECHNICIAN (Part No. HD-44750).