Speedometer Display - Yamaha WaveRunner FX140 Service Manual

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ELEC
INDICATION SYSTEM

Speedometer display

1. Check:
• Speedometer display
Does not display → Measure the speed
sensor output voltage and pulses.
Without specification → Replace the
multifunction meter.
2. Measure:
• Speed sensor output voltage and pulses
Out of specification → Repair or
replace.
Speed sensor output voltage
(dependant on the paddle wheel
position):
Less than 400 mV/
More than 11.6 V
Output pulse:
2 pulses/one-full turn
Measurement steps:
• Apply DC 12 voltage to the white color
three-pin connector (between the red/yel-
low and black/yellow leads).
• Rotate the paddle wheel by hand and
measure the voltage between the black
and yellow leads.
NOTE:
As the paddle wheel is rotated, a square-
wave voltage signal a is produced.
• Two pulses occur every time the paddle
wheel makes one-full turn.
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