Buell 2008 XB SERIES Electrical Diagnostics Manual page 136

Idle Air Control: DTC P0506 (34); DTC P0507 (34); DTC P0511 (34) (Part 1 of 2)
Check intake manifold for
leaks. See 2.9 INTAKE
LEAK TEST.
Leaks found?
YES
Repair
intake
leak.
NOTE:
Clear DTCs and confirm proper
operation with no check engine lamp.
Codes can be cleared using DIGITAL
TECHNICIAN (Part No. HD-44750).
2-86 2008 Buell XB Diagnostics: Engine Management
Remove air cleaner cover and element.
Is throttle valve completely closed?
Monitor Idle Air Control (IAC) pintle for 2
seconds after turning Ignition Switch ON.
1
Does pintle extend and then retract during 2
second Ignition Switch ON reset procedure?
YES
NO
Check fuel
pressure.
Breakout Box to connector [11B]
See 2.15 FUEL
leaving the Electronic Control
PRESSURE
Module (ECM) disconnected. Check
TEST.
terminal "17" for battery voltage.
Using DVOM, measure resistance
between IAC connector [87B]
3
IAC
1
4 2
3
4
Does each wire measure 0.5 ohms or less?
Turn Ignition Switch ON. With ECM
still disconnected, check voltage on
4
all four terminals at connector [87B].
YES
Disconnect IAC Motor and connect test
2
seconds, then turn Ignition Switch OFF.
Check test lamp during Ignition Switch
Problem
indicated.
Remove test lamp. Connect
Battery voltage present?
YES
and Breakout Box [11].
ECM
WIRE COLOR
to 23
(BK/0)
to 20
(BK/PK)
to 21
(BE/GN)
to 22
(BN/R)
YES
Is voltage present?
YES
Repair short
to voltage.
NO
Lubricate and
adjust throttle
cables.
NO
lamp. Turn Ignition Switch ON for 2
ON/OFF cycle.
Normal
behavior.
Repair faulty IAC
Motor connection
or IAC Motor
assembly.
NO
Go to 2.13 NO
ECM POWER.
NO
Repair poor connection
at connectors [87B] or
[11B] or repair open wire
in harness.
NO
STOP
Go to Idle Air Control Test
DTC P0506 (34); P0507 (34);
P0511 (34) (Part 2 of 2).
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