Yamaha XV19SX(C) Service Manual page 450

Fault code No. 43
Diagnostic code No.
Order Item/components and probable
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 relay
unit (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).
09 Fuel system 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 (fuel
• Between relay unit coupler (fuel
• Between relay unit coupler (fuel
• Between diode 2 coupler and
• Execute the diagnostic mode.
• Replace if defective.
• If there is no malfunction with
Symptom Error is detected while reading or writing on EEPROM (CO
adjustment value).
60 EEPROM improper cylinder indication
Check or maintenance job
• Execute the diagnostic mode.
• Replace ECU if defective.
7-59
FUEL INJECTION SYSTEM
that may be pulled out.
the coupler.
and connect the coupler se-
curely.
open or short circuit.
pump relay) and ECU coupler.
(blue/red–blue/red)
(red/blue–red/blue)
pump relay) and battery termi-
nal.
(red–red)
pump relay) and diode 2 cou-
pler. (for XV19S(C)/ XV19M(C)/
XV19CTS(C)/ XV19CTM(C))
(red/white–red/white)
engine stop switch coupler. (for
XV19S(C)/ XV19M(C)/
XV19CTS(C)/ XV19CTM(C))
(black/red–black/red)
(Code No. 09)
the relay unit (fuel pump relay),
replace the ECU.
(Code No. 60)
1. Check the faulty cylinder. (If
multiple cylinders are defec-
tive, the number of the faulty
cylinders appears alternate-
ly at 2-second intervals.)
Reinstatement
method
Starting the en-
gine and oper-
ating it at idle.
Reinstatement
method
Turning the
main switch to
"ON".