Yamaha FJR1300AS(X) Service Manual page 572

Fault code No. 43
Diagnostic code No.
Order Item/components and probable
cause
1 Connections
• Relay unit coupler
• Wire harness ECU coupler
• Front cowling wire harness coupler
2 Open or short circuit in the wire har-
ness and/or front cowling wire har-
ness.
3 Malfunction or open circuit in fuel
pump relay.
Fault code No. 44
Diagnostic code No.
Order Item/components and probable
cause
1 Malfunction in ECU.
Symptom The ECU is unable to monitor the battery voltage (an open
or short circuit in the line to the ECU).
d:09 Fuel system voltage
Symptom An error is detected while reading or writing on EEPROM
(CO adjustment value).
d:60 EEPROM fault cylinder No.
FUEL INJECTION SYSTEM
Check or maintenance job
• Check the coupler for any pins
that may be pulled out.
• Check the locking condition of
the coupler.
• If there is a malfunction, repair it
and connect the coupler se-
curely.
• 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
engine stop switch coupler.
(red/black–red/black)
• Execute the diagnostic mode.
(Code No.d:09)
• Replace if defective.
• If there is no malfunction with
the fuel pump relay, replace the
ECU.
Check or maintenance job
• Set the faulty cylinder's exhaust
gas volume.
1. Execute the diagnostic mode
(Code No.d:60) to check the
faulty cylinder number. (If
multiple cylinders are defec-
tive, the numbers of the
faulty cylinders are displayed
alternately at 2-second inter-
vals.)
2. Execute the CO adjustment
mode and set the exhaust
gas volume of the faulty cyl-
inder to "0".
• Replace ECU if it does not re-
cover from the malfunction.
8-95
Reinstatement
method
Starting the en-
gine and oper-
ating it at idle.
Reinstatement
method
Turning the
main switch to
"ON".
(Readjust the
exhaust gas
volume after it
is reinstated.)