Yamaha 2014 MT-07 Service Manual page 472

Fault code No.
Item
2 Connection of ECU coupler.
Check the locking condition of
the coupler.
Disconnect the coupler and
check the pins (bent or broken
terminals and locking condition
of the pins).
3 Wire harness continuity.
4 Defective relay unit.
5 Defective relay unit.
6 Malfunction in ECU.
Fault code No. 44
Fault code No.
Item
Fail-safe system
Diagnostic code No.
43
Fuel system voltage: incorrect voltage supplied to the fuel injector
and fuel pump.
Improperly connected → Con-
nect the coupler securely or re-
place the wire harness.
Open or short circuit → Replace
the wire harness.
Between relay unit coupler and
ECU coupler.
red/blue–red/blue
blue/yellow–blue/yellow
Between relay unit coupler and
joint coupler.
red/white–red/white
Between joint coupler and igni-
tion fuse.
red/white–red/white
Between ignition fuse and main
switch coupler.
brown/blue–brown/blue
Between main switch coupler
and starter relay coupler.
red–red
Between starter relay coupler
and battery terminal.
red–red
Execute the diagnostic mode.
(Code No. 50)
No operating sound → Replace
the relay unit.
Execute the diagnostic mode.
(Code No. 09)
Fuel system voltage is below 3
V → Replace the relay unit.
Replace the ECU.
Refer to "REPLACING THE
ECU (engine control unit)" on
page 8-128.
44
EEPROM fault code number: an error is detected while reading or
writing on EEPROM.
Able/Unable to start engine
Able/Unable to drive vehicle
60
8-67
FUEL INJECTION SYSTEM
Start the engine and let it idle for
approximately 5 seconds.
Fault code number is not dis-
played → Service is finished.
Fault code number is displayed
→ Go to item 3.
Start the engine and let it idle for
approximately 5 seconds.
Fault code number is not dis-
played → Service is finished.
Fault code number is displayed
→ Go to item 4.
Start the engine and let it idle for
approximately 5 seconds.
Fault code number is not dis-
played → Service is finished.
Fault code number is displayed
→ Go to item 5.
Start the engine and let it idle for
approximately 5 seconds.
Fault code number is not dis-
played → Service is finished.
Fault code number is displayed
→ Go to item 6.