Buell 2002 X1 Handbook page 248

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Code 13 Test (Part 2 of 3)
NO.
0.0-0.4 volts.
Perform 4.14 FUEL
PRESSURE TEST.
Pressure too low?
YES
Repair low pres- Check for restricted
sure problem. See fuel filter or fuel line.
4.14 FUEL PRES- Restriction
SURE TEST. present?
7661
Replace fuel line
4-52
Continued from
Turn ignition OFF and reconnect O2 sensor. Turn ignition ON
and start engine. Allow engine to reach operating temperature.
Does voltage quickly flunctuate between 0.4-0.6 volts?
0.6-1.0 volts.
Perform
PRESSURE
Pressure too high?
NO YES
Replace fuel pump.
See 4.40 FUEL
PUMP.
7666
YES NO
Check for air leaks
or filter. at induction
module. Air leak
7662
present?
YES
Repair.
7663
Clear codes and confirm proper
operation with no check engine
lamp.
Code 13 Test (Part 1 of 3).
NO.
Slow or no change.
4.14 FUEL
TEST. between Pin 4 [11]
(V/GY). Continuity
NO
Check for
injectors stuck
open. See 4.22
TROUBLE CODES
23 AND 32. Retest.
7664
NO
Fuel injectors may be
dirty. See Fuel Injectors -
Removal under 4.41
THROTTLE BODY AND
INTAKE MANIFOLD.
NO.
Check continuity
STOP
(gray) and [137]
present?
Go to Code 13 Test
(Part 3 of 3).
YES NO
Replace O2 Repair open
sensor. See on V/GY wire.
4.32 OXYGEN
SENSOR.
7667
2002 Buell X1: Fuel System
YES
7668