Yamaha F400A 2022 - Page 190

4-17
Outboard motor troubleshooting
155
SPS (Out of
specification)
“Check Engine” is displayed.
Engine does not restart (In a
shift-in position).
Gear shift does not operate.
Alert indicator is ON.
<Engine speeds do not syn-
chronize>
Check the fuse.
5-10
A-14
Measure the shift actuator re-
lay input voltage.
5-23
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
156
157
Engine–R/C
communica-
tion (Communi-
cation error)
“Check Engine” is displayed.
Alert indicator is ON.
<Engine speeds do not syn-
chronize>
Check the extension wire har-
ness proper connection and
damage.
—
Check for wiring continuity
between the engine ECM and
the engine main harness.
A-14
Check the Digital Electronic
Control circuit.
*2
Engine does not restart.
Fully closed throttle.
Shift actuator rod returns to
the N position.
CL7 gauge does not operate.
Trouble codes 156 and 157
detected simultaneously.
Alert indicator is ON.
<Engine speeds do not syn-
chronize>
Unable to switch the active
station in the case of dual sta-
tion arrangement (trouble
code 186).
Check that the extension wire
harness is connected properly
and that there is no damage.
—
Check for wiring continuity
between the engine ECM and
engine main harness.
A-14
Check the Digital Electronic
Control circuit.
*2
Trou-
ble
code
Item (Condi-
tion)
Symptom Checking steps
See
page