Yamaha F400A 2022 - Page 192

4-19
Outboard motor troubleshooting
166
167
168
169
Remote con-
trol system
(Main 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 166 and 167, and ei-
ther one of the trouble codes
168 and 169 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.
170
Remote con-
trol system
(Main station
[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.
171
172
173
174
Remote con-
trol system
(Sub station
[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 171 and 172, and ei-
ther one of the trouble codes
173 and 174 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.
175
Remote con-
trol system
(LPS Irregular
signal [Sub sta-
tion Digital
Electronic Con-
trol ECM inter-
nal circuit
malfunction])
“Check Engine” is displayed.
Locked at engine idle speed.
Shift actuator rod returns to
the N position.
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
Trou-
ble
code
Item (Condi-
tion)
Symptom Checking steps
See
pa
ge