Yamaha FZ8NA Service Manual page 465

Fault code No.
Item
Fail-safe system
Diagnostic code No.
Meter display
Procedure
Item/components and
probable cause
5 Intake air temperature sensor
malfunction
6 ECU malfunction
Fault code No.
Item
Fail-safe system
Diagnostic code No.
Meter display
Procedure
Item/components and
probable cause
1 Connection of atmospheric
pressure sensor coupler
Check the connection of the
coupler is secure.
Remove the coupler, and
check each pin (for bending,
wear, or locking).
22
Intake air temperature sensor: open or short circuit detected. (no
normal signals are received from the intake air temperature sensor.)
Able to start engine
Able to drive vehicle
d:05
Displays the intake air temperature.
Compare the actually measured intake air temperature with the
meter display value.
Check or maintenance job
Check in the diagnostic mode
(Code No. d05).
Sensor inspection procedure
Refer to "CHECKING THE
INTAKE AIR TEMPERATURE
SENSOR" on page 8-202.
During cold starting: A tem-
perature close to the ambient
temperature is indicated.
After the engine has warmed
up, the ambient temperature
+20 °C (68 °F) is indicated in
the meter display.
Indication is incorrect. →
Replace the intake air tem-
perature sensor.
Replace the ECU
23
Atmospheric pressure sensor: open or short circuit detected. (no
normal signals are received from the atmospheric pressure sensor.)
Able to start engine
Able to drive vehicle
d:02
Displays the atmospheric pressure.
Compare the actually measured atmospheric pressure with the
meter display value.
Check or maintenance job
Poor connection → Connect it
securely, or replace the wire
harness.
FUEL INJECTION SYSTEM
8-70
Sensor inspection proce-
dure
Place the main switch to the
ON position, and check the
fault code indication.
No fault code indicated. →
Recovered.
Fault code indicated. →
Check the next step.
Sensor inspection proce-
dure
Place the main switch to the
ON position, and check the
fault code indication.
No fault code indicated. →
Recovered.
Fault code indicated. →
Check the next step.