Yamaha XT660 2004, Service Manual

Page: 349 / 463

7 - 5
FI
FUEL INJECTION SYSTEM
Communication error with the meter
30
Lean angle cut-off
switch (latch up
detected) The motorcycle has over-
turned.
— No No
33
Faulty ignition Open circuit is detected in the
primary lead of the ignition
coil.
— No No
41
Lean angle cut-off
switch (open or short
circuit) Open or short circuit is
detected.
— No No
42
Speed sensor, neutral
switch No normal signals are
received from the speed sen-
sor or an open or short circuit
is detected in the neutral
switch. • Fixes the gear to the top
gear.
Yes Yes
43
Fuel system voltage
(monitor voltage) The ECU is unable to monitor
the battery voltage (open cir-
cuit in the wire to the ECU). • Fixes the battery voltage
to 12 V. Yes Yes
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).
— Yes Yes
46
Vehicle system power
supply (monitor volt-
age) Power supply to the fuel injec-
tion system relay is not nor-
mal.
— Yes Yes
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.
— No Yes
—
Start unable warning Relay is not turned ON even if
the crank signal is input while
the start switch is turned ON.
When the start switch is turned
ON while an error is detected
with the fault code of No. 12,
19, 33, 41 or 50. • Engine trouble warning
light flashes when the start
switch is turned ON.
No No
Fault
code No.
Item Symptom Fail-safe action Startability Driveability
Er-1
ECU internal malfunc-
tion (output signal
error) No signals are received from
the ECU.
— No No
Er-2
ECU internal malfunc-
tion (output signal
error) No signals are received from
the ECU within the specified
duration.
— No No
Er-3
ECU internal malfunc-
tion (output signal
error) Data from the ECU cannot be
received correctly.
— No No
Er-4
ECU internal malfunc-
tion (input signal error) Non-registered data has been
received from the meter.
— No No
Fault
code No.
Item Symptom Fail-safe action Startability Driveability