Ptt Electrical System; Checking The Ptt Relay - Yamaha F225F Service Manual

Outboard motor and Digital Electronic Control connection / PTT electrical system Outboard motor and Digital Electronic Control connection / PTT electrical system
2. Disconnect the engine ECM couplers b
and c.
3. Remove the intake manifold (STBD).
4. Remove the fuse holder a, and then
disconnect the fuse holder coupler d.
d
5. Check the wiring harness for continuity.
b
a
4 3 2
8 7 6 5
12 11 10 9
c
15 14
d
c
b
a
38 36
53
93 92 91 90
5 4 3
6Y9 Multifunction Color Gauge sensor /

PTT electrical system

Wiring harness continuity:
a Terminal 2–b Terminal 91
a Terminal 3–b Terminal 90
a Terminal 4–c Terminal 36
a Terminal 5–b Terminal 38
a Terminal 6–Ground
a Terminal 7–d Terminal 4
a Terminal 8–c Terminal 53
a Terminal 9–Ground
a Terminal 10–d Terminal 3
a Terminal 11–Ground
a Terminal 12–d Terminal 5
a Terminal 14–b Terminal 93
a Terminal 15–b Terminal 92
6. Connect the fuse holder coupler d, and
then install the fuse holder a.
7. Connect the engine ECM couplers b
and c.
8. Connect the main wiring harness coupler
a.
PTT electrical system

Checking the PTT relay

1. Measure the input voltage between the
terminals a and b.
b
PTT relay input voltage:
Terminal a–Terminal b
12.0 V (battery voltage)
2. Disconnect the PTT relay coupler c.
3. Measure the input voltage between the
PTT relay coupler terminal and ground.
0
1
2
3
4
5
6
7
a
8
9
10
A
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