Buell 2007 FIREBOLT Service Manual page 399

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Code 15 Test (Part 1 of 2)
1
YES
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?
YES
Install original IAT
sensor, replace
ECM and road test.
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.
Clear codes and confirm proper operation with no
check engine lamp. Codes can be cleared using
DIGITAL TECHNICIAN (Part No. HD-44750).
4-58 2007 Buell Firebolt: Fuel System
Connect Breakout Box to connector [11] leaving ECM disconnected. With
engine at room temperature, 60-90°F (16-32° C), use a DVOM to measure resistance
Pin 10 of [11] and Pin 7 of [11] on the Breakout Box.
Connect ECM to Breakout Box. Check for
intermittents by performing
TEST. Intermittents present?
While wiggling harness to locate source of
intermittents, perform the steps under
15 Test (Part 2 of 2)
Bold Asterisks. Repair as necessary.
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?
NO
System OK. Repair short to
Lt. GN/Y wire.
across
YES
4.7 WIGGLE
YES
Code
marked by
NO
Less than
4.7 volts
YES NO
Replace ECM. See
ground on 4.30 ELECTRONIC
CONTROL
NO
STOP
Go to Code 15 Test
(Part 2 of 2).
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?
NO
Greater than
5.3 volts.
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?
YES
Replace ECM. See
4.30 ELECTRONIC
MODULE. CONTROL MODULE.
Examine IAT signal
wire (Lt. GN/Y) for
short to 12 volts
and repair.
NO