Buell 2002 S3T Service Manual page 265

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Code 13 Test (Part 1 of 3)
YES
STOP
Go to Code 13 Test
(Part 2 of 3).
4-50 2002 Buell S3T: Fuel System
Disconnect O2 sensor from harness. Connect DVOM to
Pin 4 (+) and Pin 8 (-) of connector [11] (gray) or use Scanalyzer.
Turn ignition ON and start engine. (Engine must be on and running for
Scanalyzer to read O2 sensor values). Observe O2 voltage.
Is it approximately 0.5 volts?
NO.
0 volts.
Install Breakout Box (HD-42682) leaving
1
harness side connector [11] disconnected
from the Breakout Box. Is the O2 voltage
approximately 0.5 volts?
YES
Locate and repair
short to ground on
V/GY wire.
7656
Install Breakout Box (HD-42682) leaving
1
harness side connector [11] disconnected
from the Breakout Box. Is the O2 voltage
NO YES
Inspect V/GY
Replace ECM. See
wire for shorts to
4.29 ELECTRONIC
voltage and repair.
CONTROL MODULE.
7657
Clear codes and confirm proper
operation with no check engine
lamp.
NO.
Greater than
1 volt.
approximately 0.5 volts?
NO
Replace ECM. See
4.29 ELECTRONIC
CONTROL MODULE.
7658 7659