Yamaha YZ450FA 2011 Owner's Service Manual page 279

Fault code No.
Symptom
Fail-safe system
Diagnostic code No.
FI diagnostic tool dis-
play
Checking method
Item Item/components and probable cause Check or maintenance job
4 Installed condition of sensor.
Check that the gap between the crank-
shaft position sensor and the rotor is
0.85 mm.
5 Defective crankshaft position sensor.
6 Malfunction in ECU.
If fault code Nos. 13 and 14 are both displayed, perform the checks and maintenance jobs for
fault code No. 13 first.
12
No normal signals are received from the crankshaft position sensor.
Able to start
Able to drive
—
—
—
Check that the sensor is in-
stalled securely and that
there are no pinched
leads.Check that the ECU is
installed securely and that
there are no pinched leads.
Incorrect installation → Re-
install or repair.
Sensor malfunction → Re-
place.
Refer to "CHECKING THE
AC MAGNETO" section.
Replace the ECU.
7-17
FUEL INJECTION SYSTEM
Checking method
Crank the engine and
check the fault code
display.
Fault code number
is not displayed →
Service is finished.
Fault code number
is displayed → Re-
fer to item 5.
Crank the engine and
check the fault code
display.
Fault code number
is not displayed →
Service is finished.
Fault code number
is displayed → Re-
fer to item 6.