Yamaha XP500 Service Manual page 450

Fault
Item
code No.
Faulty the FID valve
37
Lean angle cut-off
30 switch (latch up
41 detected) (open or
short circuit)
Fuel system voltage
43 (monitor voltage)
Error in writing the
amount of CO adjust-
44
ment on EEPROM
Vehicle system power
46 supply (monitor volt-
age)
ECU (engine) internal
malfunction (memory
50
check error)
Communication error with the meter
Fault
Item
code No.
ECU (engine) internal
Er-1 malfunction (output sig-
nal error)
ECU (engine) internal
Er-2 malfunction (output sig-
nal error)
ECU (engine) internal
Er-3 malfunction (output sig-
nal error)
ECU (engine) internal
Er-4 malfunction (input sig-
nal error)
FUEL INJECTION SYSTEM
Symptom
Stuck FID valve. (when fully
open)
The scooter has over turned.
Lean angle cut-off switch-open
or short circuit detected.
Supply power to the fuel injec-
tor and fuel pump is not nor-
mal.
An error is detected while
reading or writing on
EEPROM (CO adjustment
value).
Power supply to the FI system
relay is not normal
Faulty ECU (engine) memory.
When this malfunction is
detected, the code number
might not appear on the meter.
Symptom
No signals are received from
the ECU (engine).
No signals are received from
the ECU (engine) within the
specified duration.
Data from the ECU (engine)
cannot be received correctly.
Non-registered data has been
received from the meter.
7 - 5
Fail-safe action
--
--
Fixes the battery voltage to
12 V.
--
--
--
Fail-safe action
--
--
--
--
FI
Engine start- Vehicle drive-
ability ability
Able Able
Unable Unable
Able Able
Able Able
Able Able
Unable Unable
Engine start- Vehicle drive-
ability ability
Unable Unable
Unable Unable
Unable Unable
Unable Unable