4-9
Outboard motor troubleshooting
20
Knock Sensor
2 (Irregular sig-
nal)
“Check Engine” is displayed.
High engine idle speed.
<Engine speeds do not syn-
chronize>
Measure the knock sensor re-
sistance.
5-39
Check for wiring continuity
between the knock sensor
and the engine ECM.
A-14
23
Air tempera-
ture sensor
(Out of specifi-
cation)
“Check Engine” is displayed.
High engine idle speed.
<Engine speeds do not syn-
chronize>
Check the intake air tempera-
ture using the YDIS.
5-36
Measure the intake air tem-
perature sensor input voltage.
5-36
Measure the intake air tem-
perature sensor resistance.
5-36
Check for wiring continuity
between the intake air tem-
perature sensor and the en-
gine ECM.
A-14
24
Cam position
sensor (EX) (Ir-
regular signal)
“Check Engine” is displayed.
High engine idle speed.
Degraded acceleration perfor-
mance.
Declining maximum engine
speed.
<Engine speeds do not syn-
chronize>
Measure the cam position
sensor input voltage.
5-23
Measure the cam position
sensor output voltage.
5-23
Check for wiring continuity
between the cam position
sensor and the engine ECM.
A-10
Check the brim of the cam-
shaft.
7-50
27
Water in fuel fil-
ter (Water in
fuel filter)
“Water in fuel” is displayed.
Alert buzzer comes on while
the shift is in the N position.
Check the fuel filter for water. —
Measure the water detection
switch input voltage.
5-28
Check the water detection
switch for continuity.
5-28
Check for wiring continuity
between the water detection
switch and the engine ECM.
A-12
29
Air pressure
sensor (Out of
specification)
“Check Engine” is displayed.
High engine idle speed.
Declining maximum engine
speed.
<Engine speeds do not syn-
chronize>
Measure the intake air pres-
sure sensor input voltage.
5-36
Measure the intake air pres-
sure sensor output voltage.
5-36
Check for wiring continuity
between the intake air pres-
sure s
ensor and the engine
ECM.
A-14
Trou-
ble
code
Item (Condi-
tion)
Symptom Checking steps
See
page
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