Checking The Fuel Injector - Yamaha F225F Service Manual

ELEC
Water detection switch input voltage:
Blue/White (L/W)–Black (B)
4.75–5.25 V
3. Turn the engine start switch to OFF, and
then remove the filter cup assembly.
4. Check that the float a move smoothly.
5. Check the water detection switch for
continuity when the float a is in positions
A and B . NOTICE: Do not remove the
clip and float.
A
b c
B
b c
Float position
A
B
Float height d (reference data):
53.0 mm (2.10 in)
6. Disconnect the engine ECM coupler e.
5-35
Electrical system
a
d
a
Terminal
b c
7. Check the wiring harness for continuity.
a
2 1
Wiring harness continuity:
Terminal 1–Terminal 72
Terminal 2–Terminal 77
8. Connect the engine ECM coupler e.
9. Install the filter cup assembly. See "Fuel
filter assembly" (6-9).
10. Connect the water direction switch
coupler a.

Checking the fuel injector

1. Check the operation of the fuel injector
using the YDIS "Stationary test" and
check the operating sound.
2. Disconnect the fuel injector couplers a.
3. Turn the engine start switch to ON, and
then measure the input voltage between
the fuel injector coupler terminal and
ground.
e
e
72
77