Yamaha F400A 2022 - Page 196

4-23
Outboard motor troubleshooting
215
DI fuel pressure
sensor (P)
(Out of specifi-
cation)
“Check Engine” is displayed.
Engine speed is limited to
2000 r/min.
Check the fuel pressure sen-
sor (direct injection pump)
(PORT) using the YDIS.
—
Check the wiring is connected
properly and that there is no
damage.
A-12
216
DI fuel pressure
(P)
(DI fuel pres-
sure drop P)
(Out of specifi-
cation)
“Check Engine” is displayed.
Engine speed is limited to
2000 r/min.
Check fuel pipe for damage or
bends.
—
Check the operation of the di-
rect injection pump (PORT) in
the YDIS “Stationary test”.
5-30
217
DI fuel pressure
(P)
(DI fuel pres-
sure rise P)
(Out of specifi-
cation)
“Check Engine” is displayed.
Engine speed is limited to
2000 r/min.
Check fuel pipe for be
clogged.
—
Check the operation of the in-
jector in the YDIS “Stationary
test”.
5-29
218
DI fuel pump
(P)
(Irregular sig-
nal)
“Check Engine” is displayed.
Engine speed is limited to
2000 r/min.
Check the wiring is connected
properly and that there is no
damage.
A-12
Check the injector driver input
voltage.
5-28
Check the operation of the di-
rect injection pump (PORT) in
the YDIS “Stationary test”.
5-30
219
DI fuel pressure
sensor (S)
(Out of specifi-
cation)
“Check Engine” is displayed.
Engine speed is limited to
2000 r/min.
Check the fuel pressure sen-
sor (direct injection pump)
(STBD) using the YDIS.
—
Check the wiring is connected
properly and that there is no
damage.
A-12
220
DI fuel pressure
(S)
(DI fuel pres-
sure drop S)
(Out of specifi-
cation)
“Check Engine” is displayed.
Engine speed is limited to
2000 r/min.
Check fuel pipe for damage or
bends.
—
Check the operation of the di-
rect injection pump (STBD) in
the YDIS “Stationary test”.
5-30
Trou-
ble
code
Item (Condi-
tion)
Symptom Checking steps
See
page