Buell XB9R 2003, Service Manual, Page: 331 / 566

4-34 2003 Buell XB9R: Fuel System
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Test 4.13 (Part 1 of 2)
Run fuel pressure test as described under
4.13 FUEL PRESSURE TEST . Fuel pres-
sure should remain steady at 49-51 PSI
(338-352 kPa). Does it?
Flush out fuel cell.
See 4.38 FUEL
PUMP .
YES
No trouble
found. Review
symptoms.
YES
Check for faulty fuel
pump and replace.
See 4.38 FUEL PUMP .
NO
Check for faulty fuel
pump and replace.
See 4.38 FUEL
PUMP .
Low pressure. High pressure.
7455
7461
7459
Check voltage drop between
battery positive (+) and Termi-
nal D (-) on pump side of con-
nector [89] during first two
seconds after key ON. Is volt-
age greater than 1 VDC?
Check for restricted
pump inlet screen. Is
screen restricted?
NO
Move negative (-) probe to GY
wire on Terminal 87 of ignition
relay. Measure voltage during
first two seconds after key ON.
Is voltage greater than 1 VDC?
YES
Locate and repair poor
connection between ignition
relay and fuel pump.
NO
Move negative (-) probe to
GY/O wire on Terminal 30 of
ignition relay. Measure voltage
during first two seconds after
key ON. Is voltage greater
than 1 VDC?
YES
Locate and repair poor
connection between bat-
tery and ignition relay.
NO
Replace ignition relay. See Ignition Relay
under 7.5 STARTER INTERLOCK .
YES
7457
7458
7456
Go to Test 4.13
(Part 2 of 2) .
STOP
No pressure.