Yamaha XP500, Service Manual

Page: 450 / 559

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