Speed Sensor - Yamaha RS90K Service Manual

a
b
G
B
1
SIGNAL SYSTEM
3. Measure:
• Fuel sender resistance (full a)
• Fuel sender resistance (empty b)
Ω × 1
– +

SPEED SENSOR

1. Inspect:
• Speed sensor
Inspection steps:
• Connect the pocket tester (DC 20 V) to the
speed sensor coupler 1 (wire harness side) as
shown.
Positive tester probe → White
Negative tester probe → Chocolate
Positive battery terminal → Blue/Yellow
Negative battery terminal → Chocolate
• Elevate the track and slowly rotate it.
• Measure the voltage (DC 5 V) of white and
chocolate. With each full rotation of the track the
voltage reading should cycle from 0.6 V to 4.8 V
to 0.6 V to 4.8 V.
Out of specification → Replace.
8-39
ELEC
Out of specification → Replace.
Fuel sender resistance (full):
10 ~ 12 Ω at 20 °C (68 °F)
Fuel sender resistance (empty):
179 ~ 185 Ω at 20 °C (68 °F)
– +