Yamaha F400A 2022 - Page 193

Outboard motor troubleshooting
4-20
176
Remote con-
trol system
(Sub station,
center out-
board motor
[LPS Irregular
signal])
“Check Engine” is displayed.
Locked at engine idle speed.
Shift actuator rod returns to
the N position.
Alert indicator is ON.
Measure the LPS output volt-
age using the YDIS.
*2
Check for wiring continuity
between the LPS and the Dig-
ital Electronic Control ECM.
177
178
179
180
Remote con-
trol system
(Sub station,
center out-
board motor
[LPS Irregular
signal])
“Check Engine” is displayed.
Locked at engine idle speed.
Alert indicator is ON.
Measure the LPS output volt-
age using the YDIS.
*2
Check for wiring continuity
between the LPS and the Dig-
ital Electronic Control ECM.
Locked at engine idle speed.
Shift actuator rod returns to
the N position.
Alert indicator is ON.
When either one of the trouble
codes 177 and 178, and ei-
ther one of the trouble codes
179 and 180 took place simul-
taneously.
Measure the LPS output volt-
age using the YDIS.
Check for wiring continuity
between the LPS and the Dig-
ital Electronic Control ECM.
181
Remote con-
trol system
(Sub station
[LPS Irregular
signal])
“Check Engine” is displayed.
Locked at engine idle speed.
Throttle does not operate.
Shift actuator rod returns to
the N position.
Alert indicator is ON.
Measure the LPS output volt-
age using the YDIS.
*2
Check for wiring continuity
between the LPS and the Dig-
ital Electronic Control ECM.
183
Remote con-
trol system
(LPS Irregular
signal [Digital
Electronic Con-
trol ECM inter-
nal circuit
malfunction])
“Check Engine” is displayed.
Station selection is impossi-
ble.
Alert indicator is ON.
Replace the Digital Electronic
Control ECM of the main sta-
tion.
(When replacing the Digital
Electronic Control ECM with a
new one, resetting of Digital
Electronic Control ECM is
necessary.)
*2
184
Remote con-
trol system
(LPS Irregular
signal [Digital
Electronic Con-
trol ECM inter-
nal circuit
malfunction])
“Check Engine” is displayed.
Engine selection is impossi-
ble.
Alert indicator is ON.
Replace the Digital Electronic
Control ECM of the main sta-
tion.
(When replacing the Digital
Electronic Control ECM with a
new one, resetting of Digital
Electronic Control ECM is
necessary.)
*2
Trou-
ble
co
de
Item (Condi-
tion)
Symptom Checking steps
See
page