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Fault code No.
Symptom
Fail-safe system
Diagnostic code No.
FI diagnostic tool display
Checking method
Item
Item/components and probable cause
4
Defective AC magneto.
5
Malfunction in ECU.
Fault code No.
Symptom
Fail-safe system
Diagnostic code No.
FI diagnostic tool display
Checking method
Item
Item/components and probable cause
1
Malfunction in ECU.
46
Power supply to the ECU is not normal.
Able to start (depending on circumstances)
Able to drive vehicle (depending on circumstances)
50
ECU internal malfunction
Unable to start
Unable to drive
FUEL INJECTION SYSTEM
Check or maintenance job
Defective → Replace.
Refer to "CHECKING THE AC
MAGNETO" section.
Replace the ECU.
Check or maintenance job
Replace the ECU.
7-32
Checking method
Start the engine, set the
switch on the FI diagnostic
tool sub-wire harness to
"OFF" while the engine is
idling, and let the engine
continue to idle for 5 sec-
onds or more.
After completing the above
operation, check whether a
fault code number is dis-
played.
Fault code number is not
displayed → Service is
finished.
Fault code number is dis-
played → Refer to item 5.
Checking method
Set the switch on the FI di-
agnostic tool sub-wire har-
ness to "ON", and then
check the fault code dis-
play.
Fault code number is not
displayed → Service is fin-
ished.

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  • Rob Apr 28, 2017 08:33:
    Thank you for the manuals. Yzf450 braap!