Trouble Code 13 - Buell 2007 FIREBOLT Service Manual

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TROUBLE CODE 13

GENERAL
Oxygen Sensor
See Figure 4-34. The oxygen sensor provides a signal to the
ECM which indicates whether the engine is running rich or
lean.
A low voltage signal (<0.41 V) indicates the engine is
running lean.
A high voltage signal (>0.56 V) indicates the engine is
running rich.
When the air/fuel mixture is ideal, approximately 14.7 parts
air to 1 part fuel, the voltage will be approximately 0.48 V.
DIAGNOSTICS
Diagnostic Tips
The DVOM displays the signal from the oxygen sensor in
volts. This voltage will have an average value tending towards
lean, rich or ideal value depending on operating temperature
of the engine, engine speed and throttle position. An open/
short to voltage or short to ground in the V/GY wire will cause
the engine to run rich (short to ground) or lean (short to volt-
age) until fault is detected. Once fault is detected, vehicle will
run in open loop. The engine must be running below 5000
RPM for the ECM to detect an oxygen sensor failure.
Check for the following conditions:
Poor connection. Inspect the ECM harness connector
[11], fuel injector connectors [84, 85] and oxygen sensor
connector wiring for backed out terminals, improper mat-
ing, broken locks, improperly formed or damaged termi-
nals, poor terminal-to-wire connection and damaged
harness.
Dirty/stuck open injectors. The motorcycle may run
lean (dirty/clogged injectors) or rich (stuck open injec-
tors) if there is an injector problem. This could also cause
poor fuel economy and performance.
Loose oxygen sensor. See
sensor is loose engine performance may be affected.
This could also show up as a slow changing oxygen sen-
sor voltage.
Loose/leaking exhaust. This can cause a poor ground
connection for sensor or allow fresh air into the exhaust
system. If fresh air enters exhaust system, the oxygen
sensor will read a lean condition, causing the system to
go rich.
Diagnostic Notes
1. Connect BREAKOUT BOX (Part No. HD-42682) to ECM.
See 4.6 BREAKOUT BOX.
Figure 4-35. If the oxygen
b1111x7x
2
1
1. Oxygen sensor
2. Connector [137]
Figure 4-34. Oxygen Sensor
8467
Figure 4-35. Oxygen Sensor (shock absorber removed)
2007 Buell Firebolt: Fuel System
4.17
4-47