Yamaha FZS6W Service Manual page 352

Fault code No. 43 Symptom The ECU is unable to monitor the battery voltage.
Diagnostic code No.
Item/components and probable
Order
Connected state of connector
• Fuel injection system relay coupler
• Main wire harness ECU coupler
1
Open or short circuit in the wire har-
ness.
2
Malfunction or open circuit in fuel
injection system relay
3
Fault code No. 44 Symptom
Diagnostic code No.
Item/components and probable
Order
Malfunction in ECU
1
50 Fuel injection system relay
cause
An error is detected while reading or writing on EEPROM
(CO adjustment value).
60 EEPROM fault cylinder No.
cause
8-51
FUEL INJECTION SYSTEM
Check or maintenance job
• Check the coupler for any pins
that may have pulled out.
• Check the locking condition of
the coupler.
• If there is a malfunction, repair it
and connect it securely.
• Repair or replace if there is an
open or short circuit.
• Main wire harness
(Red–Red)
(Red/Black–Red/Black)
(Red/Blue–Red/Blue)
(Blue/Yellow–Blue/Yellow)
• Execute the diagnostic monitor-
ing mode. (Code No. 50)
• Replace if defective.
• If there is no malfunction with
the fuel injection system relay,
replace the ECU.
Check or maintenance job
• Set the faulty cylinder's exhaust
gas volume.
1 Execute the diagnostic mode
(Code No. 60) to check the
faulty cylinder number. (If mul-
tiple cylinders are defective,
the numbers of the faulty cyl-
inders are displayed alter-
nately at 2-second intervals.)
• Replace ECU if it does not
recover from the malfunction.
Reinstate-
ment method
Starting the
engine and
operating it at
idle.
Reinstate-
ment method
Turning the
main switch
ON.
(Readjust the
exhaust gas
volume after it
is reinstated.)