Yamaha 2009 XP500Y TMAX Service Manual page 348

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Fault code No.
43
Diagnostic code No.
Order Item/components and probable
cause
1
Connections
• Fuel injection system relay coupler
• Wire harness ECU (engine control
unit) coupler
2
Defective fuel injection system relay.
3
Open or short circuit in the wire har-
ness.
4
Malfunction or open circuit in fuel in-
jection system relay.
Fault code No.
44
Diagnostic code No.
Order Item/components and probable
cause
1
Malfunction in ECU (engine control
unit).
Symptom The ECU (engine control unit) is unable to monitor the
battery voltage (an open or short circuit in the line to the
ECU).
50
Fuel injection system relay
Check or maintenance job
• Check the coupler for any pins
• Check the locking condition of
• If there is a malfunction, repair it
Replace if defective.
• Repair or replace if there is an
• Between the fuel injection sys-
• Between the fuse box coupler
• Between the fuse box coupler
• 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.
• Check the faulty cylinder. (If
• Replace ECU (engine control
8-51
FUEL INJECTION SYSTEM
that may have pulled out.
the coupler.
and connect the coupler se-
curely.
open or short circuit.
tem relay coupler and ECU (en-
gine control unit) coupler.
(red/blue–red/blue)
and fuel injection system relay
coupler.
(red/blue–red/blue)
and battery terminal.
(red–red)
(Code No. 50)
the fuel injection system relay,
replace the ECU (engine con-
trol unit).
(Code No. 60)
multiple cylinders are defective,
the number of the faulty cylin-
ders appears alternately at 2-
second intervals.)
unit) if defective.
Reinstatement
method
Starting the en-
gine and oper-
ating it at idle.
Reinstatement
method
Turning the
main switch to
"ON".

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