Checking The Fuel Injector - Yamaha F150A Service Manual

a
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 fuel cup assembly.
4. Check that the float "1" moves smoothly.
5. Check the water detection switch for con-
tinuity when the float "1" is in positions
"A" and "B".
Do not remove the clip and float.
A
B
L/W
B
1
1
5-17
Fuel control unit and component
Water detection switch continuity:
Continuity:
Float position "B"
No continuity:
Float position "A"
6. Install the fuel cup assembly. See "Fuel
filter" (6-7).
7. Connect the water detection switch cou-
pler.

Checking the fuel injector

1. Check the operation of the fuel injectors
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.
a
Fuel injector input voltage:
Red/Yellow (R/Y)–Ground
12 V (battery voltage)
4. Turn the engine start switch to OFF.
5. Measure the fuel injector resistance.
R/Y