Outboard Motor And Digital Electronic Control Connection; Checking The Extension Wiring Harness; Checking The Main Wiring Harness - Yamaha F225F Service Manual

ELEC
L
B
O
G/W
b
a
Pressure pump a:
(commercially available)
Test harness (3 pins) b:
90890-06869
Speed sensor output voltage
(reference data):
Blue (L)–Black (B)
2.5 V at 392.0 kPa
2
(3.92 kgf/cm , 56.8 psi)
4.5 V at 784.0 kPa
2
(7.84 kgf/cm , 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.
7. Check the wiring harness for continuity.
5-65
Electrical system
B G
b
b
a
3 2 1
Wiring harness continuity:
Terminal 1–Terminal 79
Terminal 2–Terminal 77
Terminal 3–Terminal 66
8. Install the speed sensor, and then
connect the speed sensor coupler a.
9. Connect the engine ECM coupler b.
Outboard motor and Digital
Electronic Control connection
Checking the extension wiring
harness
1. Check the extension wiring harness for
continuity. Check the wire terminal num-
bers from a to r.
a b c
d e f g
h k m n
p r

Checking the main wiring harness

1. Disconnect the main wiring harness cou-
pler a.
b
66
79 77
a b c
d e f g
h k m n
p r
a