2003 Buell XB9S: Fuel System 4-69
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TROUBLE CODE 33 4.23
GENERAL
Fuel Pump
The fuel pump assembly is shown in Figure 4-52. ECM Pin 3
provides ground to the fuel pump. Code 33 will set if:
● See Figure 4-53. BN/Y wire is shorted to 12 volts. This
will also cause the ignition fuse to blow.
● BN/Y wire is shorted to ground. This will cause the fuel
pump to run continuously even when the motor is not
running.
● Fuel pump motor stalls or spins without providing fuel
pressure.
DIAGNOSTICS
Diagnostic Notes
The reference numbers below correlate with the circled num-
bers on the Code 33 flow chart.
1. Connect BREAKOUT BOX (Part No. HD-42682) to ECM.
See 4.6 BREAKOUT BOX.
2. Use HARNESS CONNECTOR TEST KIT (Part No. HD-
41404), red pin probe and patch cord.
3. Use HARNESS CONNECTOR TEST KIT (Part No. HD-
41404), gray socket probe and patch cord.
Figure 4-52. Fuel Pump Assembly
8775
2
3
4
1. Fuel screen
2. Wiring harness
3. Low fuel level sensor
4. Pressure regulator
1
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