Yamaha F400A 2022 - Page 189

Outboard motor troubleshooting
4-16
150
SPS (Out of
specification)
“Check Engine” is displayed.
High engine idle speed.
Engine does not restart (In a
shift-in position).
Shift actuator does not oper-
ate.
Alert indicator is ON.
<Engine speeds do not syn-
chronize>
Measure the SPS input volt-
age.
5-22
Measure the SPS output volt-
age.
5-22
Check for wiring continuity
between the SPS and the en-
gine ECM.
A-10
153
SPS (Out of
specification)
“Check Engine” is displayed.
High engine idle speed.
Engine does not restart (In a
shift-in position).
Throttle does not operate.
Alert indicator is ON.
<Engine speeds do not syn-
chronize>
Check the fuse.
5-10
A-10
Measure the shift actuator
motor resistance.
5-23
Check for wiring continuity
between the shift actuator
and the engine ECM.
A-10
Check that the gear shift op-
erates properly.
10-14
Measure the shift actuator rod
stroke.
5-23
Check the shift mechanism. 9-13
Check the lower unit. 8-5
154
SPS (Out of
specification)
“Check Engine” is displayed.
Engine does not restart.
Shift does not disengage from
the shift-in position.
Alert indicator is ON.
Check the fuse.
5-10
A-14
Measure the shift actuator re-
lay input voltage.
5-22
Measure the shift actuator
motor resistance.
5-23
Check for wiring continuity
between the shift actuator
and the engine ECM.
A-14
Check the shift actuator relay. 5-23
Check for wiring continuity
between the shift actuator re-
lay and the engine ECM.
A-14
Measure the shift actuator rod
stroke.
5-23
Check the shift mechanism. 9-13
Check the lower unit.
8-11
8-18
8-48
Trou-
ble
code
Item (Condi-
tion)
Symptom Checking steps
See
page