7 - 5
FI
FUEL INJECTION SYSTEM
Communication error with the meter
37
ISC (idle speed con-
trol) valve (stuck fully
open)
Engine speed is high when the
engine is idling.
--
Able
Able
39
Fuel injector
Fuel injector open or short cir-
cuit is detected.
--
Unable
Unable
30
41
Lean angle cut-off
switch (latch up
detected) (open or
short circuit)
The scooter has overturned.
Lean angle cut-off switch-open
or short circuit is detected.
--
Unable
Unable
42
Speed sensor
No normal signals are
received from the speed sen-
sor.
--
Able
Able
43
Fuel system voltage
(monitoring 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 reading from or
writing on EEPROM
An error is detected while
reading from or writing on
EEPROM (CO adjustment
value, code re-registering key
code, and throttle valve fully
closed notification value).
--
Able
Able
46
Vehicle system power
supply (monitoring volt-
age)
Power supply to the FI system
not normal
--
Able
Able
50
ECU internal malfunc-
tion (memory check
error)
Faulty ECU memory. When
this malfunction is detected,
the code number might not
appear on the meter.
--
Unable
Unable
61
ISC (idle speed con-
trol) valve unit (open or
short circuit)
ISC (idle speed control) valve
unit-open or short circuit
detected.
--
Able
Able
—
Start unable warning
Relay is not activated even if
the crank signal is input while
the start switch is pushed. The
start switch is pushed when
fault code No.12, 19, 30, 33,
39, 41, or 50 is displayed to
indicate an error.
Engine trouble warning light
flashes when the start
switch is turned ON.
Unable
Unable
Fault
code No.
Item
Symptom
Fail-safe action
Engine start-
ability
Vehicle drive-
ability
Er-1
ECU internal malfunc-
tion (output signal
error)
No signals are received from
the ECU.
–
Unable
Unable
Er-2
ECU internal malfunc-
tion (output signal
error)
No signals are received from
the ECU within the specified
duration.
–
Unable
Unable
Er-3
ECU internal malfunc-
tion (output signal
error)
Data from the ECU cannot be
received correctly.
–
Unable
Unable
Er-4
ECU internal malfunc-
tion (input signal 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
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