Checking The Fuel Injector - Yamaha F30B 2018 Service Manual

d. Connect the water detection switch cou-
pler.
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2. Check:
• Water detection switch continuity
Out of specification  Replace the fuel
cup assembly.
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a. Remove the fuel cup assembly. See "Fuel
filter" (6-4).
b. Check that the float "1" moves smoothly.
c. Check the water detection switch for conti-
nuity when the float "1" is in positions "A"
and "B".
Do not remove the clip and float.
A
B
Water detection switch continuity
No continuity
Float position "A"
Continuity
Float position "B"
d. Install the fuel cup assembly. See "Install-
ing the fuel filter assembly" (6-7).
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1
1
Fuel control unit and component

Checking the fuel injector

1. Check:
• Fuel injector operation (using the YDIS
"Stationary test")
No operating sound  Check the fuel in-
jector input voltage.
2. Measure:
• Fuel injector input voltage
Out of specification  Check the wire har-
ness for continuity.
Input voltage
12 V
Red/Yellow (R/Y)–Ground
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a. Disconnect the fuel injector couplers "a".
b. Turn the engine start switch to ON, and
then measure the input voltage between
the fuel injector coupler terminal and
ground.
a
c. Turn the engine start switch to OFF.
d. Connect the fuel injector couplers.
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5-23
R/Y