Trouble Code And Checking Step - Yamaha F30B 2018 Service Manual

Trouble code and checking step

—: Not applicable
Trou-
ble Item (Condition)
code
Thermo sensor
15 (Out of specifi-
cation)
TPS (Out of
18
specification)
Battery voltage
19 (Below speci-
fied voltage)
Air tempera-
ture sensor
23
(Out of specifi-
cation)
Water in fuel fil-
27 ter (Water in
fuel filter)
Symptom
"Check Engine" is displayed.
High engine idle speed
Degraded acceleration perfor-
mance
Declining maximum engine
speed
Overheat
"Check Engine" is displayed.
High engine idle speed
Degraded acceleration perfor-
mance
Battery voltage and battery
alert are displayed.
Engine operates normally.
Engine does not restart (de-
pends on battery condition).
"Check Engine" is displayed.
High engine idle speed
"Water in fuel" is displayed.
Alert buzzer comes on while
the shift is in the N position.
Outboard motor troubleshooting
Checking steps
Measure the thermo sensor in-
put voltage.
Measure the thermo sensor re-
sistance.
Check for wiring continuity be-
tween the thermo sensor and
the engine ECM.
Measure the TPS output volt-
age and opening angle using
the YDIS.
Measure the TPS input volt-
age.
Check for wiring continuity be-
tween the throttle body and the
engine ECM.
Check the battery cable and
terminals for proper connec-
tion.
Measure the lighting coil out-
put peak voltage.
Measure the lighting coil resis-
tance.
Measure the rectifier/regulator
output peak voltage.
Check the rectifier/regulator
for continuity.
Check the intake air tempera-
ture using the YDIS.
Check for wiring continuity be-
tween the throttle body and the
engine ECM.
Check the fuel filter for water.
Measure the water detection
switch input voltage.
Check the water detection
switch for continuity.
Check for wiring continuity be-
tween the water detection
switch and the engine ECM.
4-5
See
page
5-32
5-32
A-15
5-19
5-19
A-15
10-7
5-26
5-26
5-27
5-27
5-31
A-15
—
5-22
5-22
A-15