Yamaha YZF-R1 2007 Service Manual page 387

Manuals by Motomatrix / www.motomatrix.co.uk / The Solution For Lost Motorcycle Coded Keys
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.
email: info@motomatrix.co.uk
Power supply to the injectors and fuel pump is not nor-
Symptom
mal.
09 Fuel system voltage (battery voltage)
8-60
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 the coupler
securely.
• Repair or replace if there is an
open or short circuit.
• Between relay unit coupler and
ECU coupler.
(Blue/Yellow–Blue/Yellow)
(Red/Blue–Red/Blue)
• Between relay unit coupler and
starter relay coupler.
(Red–Red)
• Between relay unit coupler and
right handlebar switch coupler.
(Red/Black–Red/Black)
• Execute the diagnostic mode.
(Code No. 09)
• Replace if defective.
• If there is no malfunction with
the fuel pump relay, replace the
ECU.
Reinstatement
method
Turning the
main switch to
"ON" when the
engine stop
switch is set to
" ".