Yamaha YP250R 2005, Service Manual

Page: 333 / 370

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ELEC
SIGNALING SYSTEM
EAS00804
5. The fuel level gauge fails to operate.
YES
NO
YES
NO
1. Fuel sender
• Remove the fuel sender from the fuel tank.
• Connect the pocket tester to the fuel
sender coupler as shown.
Positive tester probe
→
sky blue 1
Negative tester probe
→
orange/white 2
• Measure the fuel sender resistances.
Fuel sender resistance
Full position of the float
È
(
Ω ×
1)
0 ~ 7
Ω
Empty position of the float
É
(
Ω ×
10)
87 ~ 103
Ω
• Is the fuel sender OK?
Replace the fuel
sender.
Sb
O / W
2
1
È
É
2. Voltage
• Connect the pocket tester (DC 20 V) to the
meter assembly coupler as shown.
Positive tester probe
→
brown 1
Negative tester probe
→
black 2
• Set the main switch to “ON”.
• Measure the voltage (DC 12 V) of brown
1
and black
2
at the meter assembly
coupler.
• Is the voltage within specification?
Replace the meter
assembly. The wiring circuit
from the main switch
to the meter assem-
bly coupler is faulty
and must be
repaired.
1
G / L Y B
B
Dg Sb
G / R
O / W Br / G Br / G
Gy Br
Ch
R / L
2
G y / B
G y / R