Yamaha F225F, Service Manual

Page: 133 / 576

4-8
Troubleshooting the power unit
0
1
2
3
4
5
6
7
8
9
10
A
T
roub
le code and c
h
ec
king step
The de
scr
iptions enclosed b
y
<
>
are ap
plicab
le
to the
twin and
tr
ip
le en
gine
installation
s
.
—: Not app
licab
le
Tr
o
u
b
le
code
It
em
C
o
n
d
it
ion
L
A
N ga
uge
dis
p
la
y
Sym
p
to
m
R
ema
rks
Chec
king
st
ep
s
S
ee
p
age
13
Pulser coil
mal-
fu
nct
ion
Ir
re
gula
r sign
al
C/
E
E
ng
ine do
es not
re
st
ar
t
E
n
g
in
e st
op
s
su
dde
nly
.
Me
asur
e t
he pu
lser coil air
gap
.
7
-1
Me
asur
e t
he pu
lser coil ou
tp
ut
p
eak v
o
lt
age
.
5-
47
Me
asur
e t
he pu
lser coil re
sis-
ta
nc
e
.
5-
47
Chec
k
f
o
r
wir
ing c
o
ntin
uity
b
e
tw
ee
n t
he pu
lser coil an
d th
e
e
ngin
e
ECM
.
5-
47
A-7
Che
c
k
th
e pr
ot
ru
sio
n
s on
th
e f
ly-
wh
ee
l m
a
gn
et
f
o
r
da
m
a
g
e
.
7-
14
15
Engin
e
te
mp sen
-
so
r ma
lfu
n
ctio
n
Out
of
sp
ecifica-
tio
n
C/E
High engine idle speed Deg
ra
ded
a
c
ce
ler
a
tio
n
per
fo
rm
ance
Declining maxim
u
m engine s
p
eed
<Dif
fe
rence in
e
ngin
e
idle speeds
>
<E
ng
ine
s
p
e
e
d
s
do
n
o
t sy
nc
hr
o-
niz
e
>
—
Me
asur
e t
he en
gin
e
te
mpe
ra-
tu
re
sensor
inpu
t v
o
lt
a
g
e
.
5-
50
Me
asur
e t
he en
gin
e
te
mpe
ra-
tu
re
sensor
re
sist
ance
.
5-
50
Chec
k
f
o
r
wir
ing c
o
ntin
uity
b
e
tw
ee
n th
e eng
ine
t
e
mp
er
a
tu
re
sen
s
o
r an
d th
e en
gine
ECM.
5-
50
A-7
17
Knoc
k se
nsor
malfunc
tion
Ir
re
gula
r sign
al
C/
E
High en
gin
e
idle spe
e
d
<Dif
fe
rence in
e
ngin
e
idle
spe
e
d
s
>
<E
ng
ine
s
p
e
e
d
s
do
n
o
t sy
nc
hr
o-
niz
e
>
—
Me
asur
e t
h
e
kn
oc
k sen
s
o
r r
e
sis-
ta
nc
e
.
5-
52
Chec
k
f
o
r
wir
ing c
o
ntin
uity
b
e
tw
ee
n t
he knoc
k sensor
and
th
e en
g
ine
ECM
.
5-
52
A-7