Yamaha F400A 2022 - Page 194

4-21
Outboard motor troubleshooting
186
Remote con-
trol system
(Main station
[LPS Irregular
signal])
Sub station Digital Electronic
Control does not operate.
Unable to change to the sub
station Digital Electronic Con-
trol Locked at engine idle
speed.
Shift actuator rod returns to
the N position.
Alert indicator is ON.
Turn off the engine start
switch once, and turn it on
again.
—
Check the extension wire har-
ness for proper connection
and damage.
—
187
Remote con-
trol system
(LPS Irregular
signal [Digital
Electronic Con-
trol ECM inter-
nal circuit
malfunction])
“Check Engine” is displayed.
Engine does not restart.
Alert indicator is ON.
Replace the Digital Electronic
Control ECM.
(When replacing the Digital
Electronic Control ECM with a
new one, resetting of Digital
Electronic Control ECM is
necessary.)
*2
190
PTT relay
(—)
“Check Engine” is displayed.
Stop engine synchronization
control.
——
191
PTT relay pow-
er
(—)
“Check Engine” is displayed.
Stop engine synchronization
control.
Check the wiring is connected
properly and that there is no
damage.
A-12
Check the PTT motor.
9-46
9-53
Check the power supply and
electrical management box.
A-12
192
Shift actuator
power supply
(—)
“Check Engine” is displayed.
Stop engine synchronization
control.
Check the fuse of shift actua-
tor relay.
5-23
Check the wiring is connected
properly and that there is no
damage.
A-12
Check the shift actuator relay. 5-23
193
VST fuel pump
power supply
(—)
“Check Engine” is displayed.
Engine speed is limited to
2000 r/min.
Check the fuse of high-pres-
sure fuel pump relay.
5-31
Check the wiring is connected
properly and that there is no
damage.
A-12
Check the high-pressure fuel
pump relay.
5-31
Trou-
ble
code
Item (Condi-
tion)
Symptom Checking steps
See
page