Buell 2008 XB SERIES Electrical Diagnostics Manual page 106

Intake Air Temperature: DTC P0112 (15); DTC P0113 (15) (Part 1 of 2)
1
YES
Replace IAT Sensor. See INTAKE AIR
TEMPERATURE SENSOR in
appropriate Buell Service Manual, clear
codes and road test.
Did check engine lamp turn ON and set
only DTC P0112 (15) or P0113 (15)?
YES
Install original IAT
Sensor, replace
ECM, then road test.
At some point in the flow chart you may
*
be instructed to jump directly to a the
box with the bold asterisk. Disregard
the asterisk (but not the instruction box)
if your normal progression through the
chart brings you to this location.
2-56 2008 Buell XB Diagnostics: Engine Management
Connect Breakout Box (Part No. B-48115) to connector [11] leaving the Electronic
Control Module (ECM) disconnected. With engine at room temperature, approximately
o o
68-86 F (20-30 C), use a DVOM (Part No. HD-39978) to measure resistance
across terminal "14" of [11] (Gray) and terminal "27" of [11] (Gray) on the Breakout Box.
Connect ECM to Breakout Box. Check for
Intermittents, see 2.7 WIGGLE TEST.
Intermittents present?
While wiggling harness to locate source of
intermittents, perform the steps in DTC
P0112 (15), P0113 (15) (Part 2 of 2)
marked by Bold Asterisks. Repair as
With IAT Sensor disconnected, disconnect
Breakout Box connector [11] (Gray).
Measure resistance between Breakout
Box terminal "14" (Gray) and ground.
Is resistance less than 1 megohm?
NO YES
Repair short to
System OK. ground on
(LGN/Y) wire.
Clear DTCs and confirm proper operation with no
check engine lamp. Codes can be cleared using
DIGITAL TECHNICIAN (Part No. HD-44750).
After replacing Electronic Control Module (ECM) or
TPS, TPS zero set procedure must be performed.
Refer to THROTTLE POSITION SENSOR in the
appropriate Buell Service Manual.
YES
YES
Disconnect Intake Air Temperature (IAT)
Sensor connector. Turn Ignition Switch ON.
between Breakout Box terminal "14" (+)
necessary.
NO
Less than
4.7 volts
NO
Replace
ECM.
NOTES:
NO
STOP
Go To Intake Air Temperature
Sensor DTC P0112 (15); P0113
(15) (Part 2 of 2)
NO
Using a DVOM, measure the voltage
(Gray) and terminal "27" (-) (Gray).
Is the voltage approximately 5.0 volts?
NO
Greater than
5.3 volts.
Unplug ECM leaving Breakout Box
connected at vehicle harness.
Measure voltage between Breakout
Box terminal "14" (Gray) and ground.
Is the voltage 0 volts?
YES NO
Examine IAT
Sensor signal
Replace
wire (LGN/Y)
ECM.
for short to 12
volts and
repair.
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