Checking The Ptt Switch (On Bottom Cowling) - Yamaha F30B 2018 Service Manual

f. Connect the positive battery lead to the
terminal "a", and the negative battery lead
to the terminal "b", and then check the PTT
relay for continuity.
G/W G
a
PTT relay continuity
"b" "c"
g. Disconnect the special service tool.
h. Install the PTT relay.
i. Connect the PTT relay coupler, battery
power source, ground lead, and PTT mo-
tor leads.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
Checking the PTT switch (on bottom
cowling)
1. Measure:
• PTT switch input voltage
Out of specification  Check the wire har-
ness for continuity.
Input voltage
12 V
Red (R)–Ground
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Disconnect the PTT switch coupler "a".
b. Measure the input voltage between the
PTT switch coupler terminal and ground.
Lg
Sb
d
b
c
e
"d" "e"
a
c. Connect the PTT switch coupler.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
2. Check:
• PTT switch continuity
Out of specification  Replace.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Disconnect the PTT switch coupler.
b. Check the PTT switch for continuity.
PTT switch continuity
Switch po-
sition
UP
DN
c. Connect the PTT switch coupler.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
5-45
PTT system
c
b
Terminal
"a" "b"
R
a
Sb
R
Lg
"c"