Yamaha YZ450FA Automobile User Manual


 
7-17
FUEL INJECTION SYSTEM
If fault code Nos. 13 and 14 are both displayed, perform the checks and maintenance jobs for
fault code No. 13 first.
4 Installed condition of sensor.
Check that the gap between the crank-
shaft position sensor and the rotor is
0.85 mm.
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.
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.
5 Defective crankshaft position sensor. Sensor malfunction Re-
place.
Refer to "CHECKING THE
AC MAGNETO" section.
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.
6 Malfunction in ECU. Replace the ECU.
Fault code No. 12
Symptom No normal signals are received from the crankshaft position sensor.
Fail-safe system Able to start
Able to drive
Diagnostic code No.
FI diagnostic tool dis-
play
Checking method
Item Item/components and probable cause Check or maintenance job Checking method