Trouble Code And Checking Step - Yamaha F150A Service Manual

Trouble code and checking step

—: Not applicable
Trouble Item
code (Condition)
Pulser coil
13
(Irregular signal)
Engine temperature
15 sensor
(Out of specification)
TPS
18
(Out of specification)
Battery voltage
19 (Below specified volt-
age)
Air temperature sen-
23 sor (Out of specifica-
tion)
Shift position switch
28
(Irregular signal)
Air pressure sensor
29
(Out of specification)
Symptom
"Check Engine" is displayed.
Engine stall
"Check Engine" is displayed.
Higher idle speed
Degraded acceleration per-
formance.
Declining maximum engine
speed.
Overheat
"Check Engine" is displayed.
Higher idle speed
Degraded acceleration per-
formance
Battery voltage and battery
alert are displayed.
Engine does not restart.
(Depends on battery condi-
tion)
Engine operates normally.
"Check Engine" is displayed.
Higher idle speed
Engine operates normally.
"Check Engine" is displayed.
Higher idle speed
4-8
Outboard motor troubleshooting
Checking steps
Measure the pulser coil output peak
voltage.
Measure the pulser coil resistance.
Check for wiring continuity between
the pulser coil and the engine ECM.
Measure the engine temperature sen-
sor input voltage.
Measure the engine temperature sen-
sor resistance.
Check for wiring continuity between
the engine temperature sensor and
engine ECM.
Measure the TPS output voltage and
opening angle using the YDIS.
Measure the TPS input voltage.
Check for wiring continuity between
the TPS and the engine ECM.
Adjust the TPS.
Check the lighting coil output peak
voltage.
Measure the lighting coil resistance.
Measure the Rectifier Regulator out-
put voltage.
Check the Rectifier Regulator for con-
tinuity.
Check the air temperature using the
YDIS.
Measure the air temperature sensor
input voltage.
Measure the air temperature sensor
resistance.
Check for wiring continuity between
the air temperature sensor and
engine ECM.
Check the gear shift operation.
Measure the shift position switch
input voltage.
Check the shift position switch for
continuity.
Check for wiring continuity between
the shift position switch and the
engine ECM.
Measure the air pressure sensor
input voltage.
Measure the air pressure sensor out-
put voltage.
Check for wiring continuity between
the air pressure sensor and the
engine ECM.
See
page
5-22
5-22
A-4
5-24
5-24
A-4
5-15
5-15
A-2
6-27
5-19
5-19
5-19
5-19
5-23
5-23
5-23
A-4
10-7
5-26
5-26
A-4
5-24
5-24
A-4