Yamaha YZFR1W 2007 Service Manual page 378

Fault code No. 43
Diagnostic code No.
Orde Item/components and probable
r cause
1 Connections
• Relay unit coupler (fuel pump relay)
• Main wire harness ECU coupler
2 Open or short circuit in the wire har-
ness.
3 Malfunction or open circuit in fuel
pump relay.
Fault code No. 44
Diagnostic code No.
Orde Item/components and probable
r cause
1 Malfunction in ECU.
Power supply to the injectors and fuel pump is not nor-
Symptom
mal.
09 Fuel system voltage (battery voltage)
Check or maintenance job
• Check the coupler for any pins
• Check the locking condition of
• If there is a malfunction, repair it
• Repair or replace if there is an
• Between relay unit coupler and
• Between relay unit coupler and
• Between relay unit coupler and
• Execute the diagnostic mode.
• Replace if defective.
• If there is no malfunction with
An error is detected while reading or writing on EEPROM
Symptom
(CO adjustment value).
60 EEPROM fault cylinder No.
Check or maintenance job
• Set the faulty cylinder's exhaust
• Replace ECU if it does not
8-59
FUEL INJECTION SYSTEM
that may have pulled out.
the coupler.
and connect the coupler
securely.
open or short circuit.
ECU coupler.
(Blue/Yellow–Blue/Yellow)
(Red/Blue–Red/Blue)
starter relay coupler.
(Red–Red)
right handlebar switch coupler.
(Red/Black–Red/Black)
(Code No. 09)
the fuel pump relay, replace the
ECU.
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.)
2 Execute the CO adjustment
mode and set the exhaust gas
volume of the faulty cylinder to
"0".
recover from the malfunction.
Reinstatement
method
Turning the
main switch to
"ON" when the
engine stop
switch is set to
" ".
Reinstatement
method
Turning the
main switch to
"ON".
(Readjust the
exhaust gas vol-
ume after it is
reinstated.)