Yamaha F400A 2022 - Page 195

Outboard motor troubleshooting
4-22
194
Water pres-
sure sensor
(Out of specifi-
cation)
“Check Engine” is displayed.
Stop engine synchronization
control.
Check the water pressure
sensor using the YDIS.
—
Measure the water pressure
sensor output voltage.
5-26
Check the wiring is connected
properly and that there is no
damage.
A-12
195
Fuel pressure
sensor
(Out of specifi-
cation)
“Check Engine” is displayed.
Engine speed is limited to
2000 r/min.
Check the fuel pressure sen-
sor (high-pressure fuel pump)
using the YDIS.
—
Check the wiring is connected
properly and that there is no
damage.
A-12
196
Fuel system
(Low-pressure
fuel pump mal-
function)
“Check Engine” is displayed.
Can not start 7 seconds after
engine stall.
Check the fuel pressure sen-
sor using the YDIS.
—
Check the wiring and fuel pipe
for damage or bends.
—
Check the operation of fuel
pump in the YDIS “Stationary
test”.
5-29
210
Engine-Fuse-
Box communi-
cation
(Communica-
tion error)
“Check Engine” is displayed.
Stop engine synchronization
control.
Check the wiring is connected
properly and that there is no
damage.
A-12
Check the input voltage to
electrical management box.
5-20
213
EDU power
supply 1
(—)
“Check Engine” is displayed.
Engine speed is limited to
2000 r/min.
Check the fuse of injector
driver relay.
A-12
Check the wiring is connected
properly and that there is no
damage.
Check the injector driver re-
lay.
214
EDU power
supply 2
(—)
“Check Engine” is displayed.
Engine speed is limited to
2000 r/min.
Check the fuse of injector
driver relay.
A-12
Check the wiring is connected
properly and that there is no
damage.
Check the injector driver re-
lay.
Trou-
ble
code
Item (Condi-
tion)
Symptom Checking steps
See
page