Yamaha F150B, Service Manual

Page: 122 / 458

4-17
TRBL
SHTG
Troubleshooting
T
roub
leshooting the PTT unit
— : Not app
licab
le
Symptom
1: PTT unit d
o
es not
operate
.
Sym
p
to
m
2
C
au
se
1
C
a
u
s
e
2
C
he
c
k
in
g
ste
p
Ref
e
r to
pa
ge
PTT
m
o
to
r d
oes
no
t
o
per
at
e
Bl
o
w
n f
u
s
e
—
Chec
k t
he f
u
se
.
5
-2
A-7
Loo
se
co
nne
ct
ion
of
t
h
e
b
a
tt
e
ry
t
e
rm
inal
—
C
hec
k t
he ba
tt
e
ry
te
rm
in
al.
3
-1
7
P
T
T s
witc
h
malfunc
tion
—
C
hec
k t
he PTT s
w
it
ch.
5
-4
9
PT
T rela
y
ma
lf
unct
ion
—
C
hec
k t
he PTT r
e
la
y.
5
-4
8
Sh
or
t,
op
en
, or
loose con
nect
ion
o
f t
he wir-
ing ha
rn
e
s
s
—
Ch
e
c
k th
e
PT
T
s
w
itch
in
pu
t
v
o
lt
ag
e
.
5-
49
A-7
Chec
k t
he PTT r
e
la
y inpu
t
v
o
lta
g
e
.
5
-4
8
A-7
Chec
k f
o
r wir
ing co
nt
in
uit
y
bet
w
e
en
th
e PTT
s
w
it
ch an
d PTT re
la
y.
5-
49
A-7
Chec
k f
o
r wir
ing co
nt
in
uit
y
bet
w
e
en
th
e PTT
s
w
it
ch an
d fu
se
.
5-
49
A-7
PT
T mot
o
r
m
a
lf
un
ct
ion
—
Chec
k t
he PTT mo
to
r.
9
-4
2
Sh
or
t,
op
en
, or
loose con
nect
ion
o
f t
he PTT
mot
o
r le
ad
—
Chec
k f
o
r wir
ing co
nt
in
uit
y
bet
w
e
en
th
e PTT
mo
to
r an
d PTT re
la
y
te
rm
ina
l.
A-7
PTT
f
luid
pre
s
su
re
d
oes
no
t in
cr
ea
se
Man
u
al v
a
lv
e op
ene
d
M
an
u
a
l v
a
lv
e ma
lfu
n
ct
ion
C
hec
k t
he ma
n
ual v
a
lv
e
.
9
-4
5
In
s
u
ff
icie
nt
PT
T
flu
id
—
Ad
d
su
ffic
ien
t f
luid
.
9-
36
PT
T flu
id leaka
g
e
—
Chec
k t
he h
y
dr
aulic pr
essure
.
9
-3
4
Clo
gge
d
filte
r
—
Disa
s
se
mb
le
and
ch
ec
k t
h
e
PT
T u
n
it
.
2
-2
9
9-
32
Clo
gge
d f
luid pa
ssa
g
e
—
G
e
ar
p
u
m
p
m
a
lf
un
ct
ion
—
Dis
as
sem
b
le
a
n
d
che
c
k th
e ge
ar
p
u
m
p
assemb
ly
.
9-
45