Yamaha F400A 2022 - Page 185

Outboard motor troubleshooting
4-12
73
OCV (S bank)
(Irregular load
current value)
“Check Engine” is displayed.
High engine idle speed.
Degraded acceleration perfor-
mance.
Declining maximum engine
speed.
<Engine speeds do not syn-
chronize>
Check the OCV operation us-
ing the YDIS.
5-25
Measure the OCV input volt-
age.
5-25
Measure the OCV resistance. 5-25
Check for wiring continuity
between the OCV and the
main relay.
A-10
Check for wiring continuity
between the OCV and the en-
gine ECM.
A-10
Check the OCV filter. 7-58
74
OCV (P bank)
(Irregular load
current value)
“Check Engine” is displayed.
High engine idle speed.
Degraded acceleration perfor-
mance.
Declining maximum engine
speed.
<Engine speeds do not syn-
chronize>
Check the OCV operation us-
ing the YDIS.
5-25
Measure the OCV input volt-
age.
5-25
Measure the OCV resistance. 5-25
Check for wiring continuity
between the OCV and the
main relay.
A-10
Check for wiring continuity
between the OCV and the en-
gine ECM.
A-10
Check the OCV filter. 7-58
83
PTT sensor
(Out of specifi-
cation)
“Check Engine” is displayed.
Check the PTT sensor using
the YDIS.
5-53
Measure the PTT sensor input
voltage.
5-53
Measure the PTT sensor out-
put voltage.
5-53
Check for wiring continuity
between the PTT sensor and
the engine ECM.
A-18
84 PTT buzzer
When setting the PTT To-
talTilt™, the PTT buzzer does
not sound even if the PTT
switch is pressed twice quick-
ly.
Check the PTT buzzer. 5-53
Check for continuity between
the PTT buzzer and the en-
gine ECM.
A-18
Trou-
ble
code
Item (Condi-
tion)
Symptom Checking steps
See
page