Checking The Speed Sensor - Yamaha F30B 2018 Service Manual

Checking the speed sensor

1. Measure:
• Speed sensor input voltage
Out of specification  Check the wire har-
ness for continuity.
Input voltage
5 V
Orange (Or)–Black (B)
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a. Disconnect the speed sensor coupler "a".
b. Turn the engine start switch to ON, and
then measure the input voltage at the
speed sensor coupler.
a
c. Connect the speed sensor coupler.
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2. Measure:
• Speed sensor output voltage
Out of specification  Replace the speed
sensor.
Output voltage at 392 kPa (3.9
kgf/cm², 57 psi) (reference data)
2.5 V
Output voltage at 784 kPa (7.8
kgf/cm², 114 psi) (reference data)
4.5 V
Blue/Red (L/R)–Black (B)
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a. Remove the speed sensor, and then con-
nect the pressure pump "1" and special
service tool "2".
b. Turn the engine start switch to ON.
c. Apply positive pressure to the speed sen-
B Or
d. Turn the engine start switch to OFF, and
e. Install the speed sensor.
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5-43
6Y8 Multifunction Meters sensor
sor slowly, and then measure the output
voltage.
L
B
O
G B
1
Pressure pump "1"
(commercially available)
Test harness (3 pins) "2"
90890-06869
Test harness (3 pins) "2"
YB-06869
then disconnect the special service tool
and pressure pump.
G/W
2
2