Yamaha XT660R S Service Manual page 365

Fault code No. 44
Used diagnostic code No. 60 (EEPROM improper cylinder indication)
Order Item/components
1 Malfunction in ECU
Fault code No. 46
Used diagnostic code No. 09
Order Item/components
1 Faulty battery
2 Open or short circuit in the wire har-
ness.
3 Coupler connections ECU coupler
Fault code No. 50
Used diagnostic code No. – –
Order Item/components
1 Malfunction in ECU
FUEL INJECTION SYSTEM
Symptom Error is detected while reading or writing on EEPROM
(CO adjustment value).
Check or maintenance job
Execute the diagnostic mode. (Code No. 60)
• Check the faulty cylinder.
• Readjust the CO of the displayed cylinder.
Refer to "ADJUSTING THE EXHAUST GAS
VOLUME" in chapter 3.
Replace the ECU if it is defective.
Symptom Power supply to the FI system relay is not normal.
Check or maintenance job
Replace or change the battery.
Refer to "CHECKING AND CHARGING THE
BATTERY" in chapter 3.
Excute the diagnostic mode. (Code No. 09)
Repair or replace if there is an open or short cir-
cuit:
between battery and fuel injection system fuse
Red - Red
between the fuel injection system fuse and fuel
injection system relay
Brown - Brown
between the fuel injection system relay and ECU
Red/Blue - Red/Blue
Check the coupler for any pins that may have
pulled out.
Check that the coupler is securely locked.
If necessary, repair the coupler or securely con-
nect it.
Symptom Faulty ECU memory. (When this malfunction is detected in the ECU, the fault
code number might not appear on the meter.)
Check or maintenance job
Replace the ECU.
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FI
Restore method
Reinstated by set-
ting the main switch
to "ON".
Restore method
Reinstated by start-
ing the engine and
operating it at idle.
Restore method
Reinstated by set-
ting the main switch
to "ON".