Yamaha YZ450FN 2022, Owner'S Service Manual, Page: 315 / 366

FUEL INJECTION SYSTEM
8-34
Fault code No. 44
TIP
Before troubleshooting, disconnect the starter motor lead from the starter relay.
Fault code No. 44
Item
EEPROM fault code number: an error is detected while reading or
writing on EEPROM.
Fail-safe system
Able/Unable to start engine
Able/Unable to drive vehicle
Diagnostic code No.
60
Diagnostic tool display
Displays the location of the abnormal portion of the EEPROM data.
•
00: No fault
•
01: CO adjustment valve
•
07: Power Tuner injection correction setting 0–8, or Power Tuner igni-
tion timing correction setting 0–8
Procedure
—
Item
Probable cause of malfunc-
tion and check
Maintenance job
Confirmation of service com-
pletion
1 Identification of malfunctioning
point.
Execute the diagnostic mode.
(Code No. 60)
00: Go to item 4.
01: Go to item 2.
07: Go to item 3.
—
2 “01” is indicated in diagnostic
mode. (Code No. 60)
EEPROM data error for adjust-
ment of CO concentration.
Change the CO concentration,
and rewrite in EEPROM.
After this adjustment, push the
engine stop switch, and then
push the start switch.
Start switch to ON (main relay
ON), and then check the condi-
tion of the fault code using the
malfunction mode of the
Yamaha diagnostic tool.
Condition is “Recovered”

Go
to item 5 and finish the service.
Condition is “Detected”

Repeat item 1.
If the same number is indicated,
go to item 4.
3 “07” is indicated in diagnostic
mode. (Code No. 60)
EEPROM data error for setting
tool adjustment values for fuel
injection amount or ignition tim-
ing.
Erase the setting map in the
diagnostic mode. (Code No. 65)
Start switch to ON (main relay
ON), and then check the condi-
tion of the fault code using the
malfunction mode of the
Yamaha diagnostic tool.
Condition is “Recovered”

Go
to item 5 and finish the service.
Condition is “Detected”

Repeat item 1.
If the same number is indicated,
go to item 4.
4 Faulty ECU. Replace the ECU. Service is finished.
5 Delete the fault code. Confirm that the fault code has
a condition of “Recovered”
using the Yamaha diagnostic
tool, and then delete the fault
code.