Yamaha F400A 2022 - Page 188

4-15
Outboard motor troubleshooting
144
ETV (Throttle
valve malfunc-
tion)
“Check Engine” is displayed.
High engine idle speed.
Throttle does not operate.
Engine speed is set at ap-
proximately 1500 r/min.
Check the battery cable and
terminals for proper connec-
tion.
10-9
Check the fuse. 5-10
Measure the lighting coil re-
sistance.
5-34
Measure the rectifier/regulator
output voltage.
5-34
Check the rectifier/regulator
for continuity.
5-34
145
ETV (Throttle
valve malfunc-
tion)
High engine idle speed.
Check that other trouble
codes (112–144) are detect-
ed.
4-4
Check the throttle valve oper-
ation.
6-29
146
147
SPS (Out of
specification)
“Check Engine” is displayed.
Engine operates normally un-
less it is stopped.
Engine does not restart (No
cranking).
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
Measure the shift actuator rod
stroke.
5-23
148
149
SPS (Center
outboard motor
[Out of specifi-
cation])
“Check Engine” is displayed.
Normal operation is possible.
Shift actuator does not oper-
ate.
(When either one of the trou-
ble codes 146 and 147, and
either one of the trouble
codes 148 and 149 took place
simultaneously)
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
Measure the shift actuator rod
stroke.
5-23
Trou-
ble
code
Item (Condi-
tion)
Symptom Checking steps
See
page