Fuel Control Unit And Component; Checking The Water Detection Switch - Yamaha F225F Service Manual

Oil pressure sensor input voltage:
Orange (O)–Black (B)
4.75 V–5.25 V
3. Remove the oil pressure sensor, and
then connect the pressure pump a and
special service tool b.
4. Apply positive pressure to the oil
pressure sensor
measure the output voltage at the
specified pressures.
P/W
B
O
G/W B
b
Pressure pump a:
(commercially available)
Test harness (3 pins) b: 90890-06869
Oil pressure sensor output voltage
(reference data):
Pink/White (P/W)–Black (B)
2.5 V at 392.0 kPa
2
(3.92 kgf/cm , 56.8 psi)
4.5 V at 784.0 kPa
(7.84 kgf/cm 2 , 113.7 psi)
5. Turn the engine start switch to OFF, and
then disconnect the special service tool
b and pressure pump a.
6. Disconnect the engine ECM coupler b.
Engine control unit and component / Fuel control unit and component
slowly, and then
G
b
a

Fuel control unit and component

7. Check the wiring harness for continuity.
b
a
3 2 1
Wiring harness continuity:
Terminal 1–Terminal 70
Terminal 2–Terminal 77
Terminal 3–Terminal 76
8. Connect the engine ECM coupler b.
9. Connect the oil pressure sensor coupler
a.
Fuel control unit and component

Checking the water detection switch

1. Disconnect the water detection switch
coupler a.
2. Turn the engine start switch to ON, and
then measure the input voltage at the
water detection switch coupler.
b
70
77 76
B L/W
a
5-34
0
1
2
3
4
5
6
7
8
9
10
A