Yamaha F225F, Service Manual

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2-13
TECH
FEA
Technical features and description
Skip-firing control
Criteria Description
ETV is locked in
an open position. Controls the
engine speed
when it has been
determined that
the ETV is locked
in an open
position. Over 1501 r/min Firing and fuel injection will be
skipped for all of the cylinders.
1399–1500 r/min Firing and fuel injection will be
skipped for cylinders #1, #2, #3, #5,
and #6.
1302–1398 r/min Firing and fuel injection will be
skipped for cylinders #2, #3, #5, and
#6.
1200–1301 r/min Firing and fuel injection will be
skipped for cylinders #2, #3, and #5.
1103–1199 r/min Firing and fuel injection will be
skipped for cylinders #2 and #5.
1001–1102 r/min Firing and fuel injection will be
skipped for cylinder #2.
Engine is over
revving. Controls the
engine speed
when over
revving is
detected. Over 6450 r/min Firing and fuel injection will be
skipped for all of the cylinders.
6399–6449 r/min Firing and fuel injection will be
skipped for cylinders #1, #2, #3, #5,
and #6.
6353–6398 r/min Firing and fuel injection will be
skipped for cylinders #2, #3, #5, and
#6.
6302–6352 r/min Firing and fuel injection will be
skipped for cylinders #2, #3, and #5.
6251–6301 r/min Firing and fuel injection will be
skipped for cylinders #2 and #5.
6200–6250 r/min Firing and fuel injection will be
skipped for cylinder #2.
Engine is rotating
in reverse. Stops the engine
if the engine
reverse rotation
is detected. Engine reverse rotation is determined using 2
parameters: presence or absence of the cam position
sensor (PORT EX) signal, and the actual advance angle
of the intake camshaft.
If the reverse rotation is detected, the engine ECM cuts
off the fuel injection and ignition to stop the engine.
Engine speed is
high when
shifting gears. Detects the
activation of shift
cutout control,
and controls the
engine speed. Decreases the engine speed to less than 1500 r/min.
Engine shut-off
switch is on. Cancels the fuel injection control and ignition control at all of the cylinders.