Yamaha FZ8NA Service Manual page 462

Fault code No.
Item
Fail-safe system
Diagnostic code No.
Meter display
d:02
Procedure
Meter display
d:03
Procedure
Item/components and
probable cause
3 ECU malfunction
Fault code No.
Item
Fail-safe system
Diagnostic code No.
Meter display
Procedure
Item/components and
probable cause
1 Connection of coolant tem-
perature sensor coupler
Check the connection of the
coupler is secure.
Remove the coupler, and
check each pin (for bending,
wear, or locking).
2 Connection of wire harness
ECU coupler
Check the connection of the
coupler is secure.
Remove the coupler, and
check each pin (for bending,
wear, or locking).
20
Intake air pressure sensor or atmospheric pressure sensor: when
the main switch is set to "ON", the atmospheric pressure sensor
voltage and intake air pressure sensor voltage differ greatly.
Able to start engine
Able to drive vehicle
d:02, d:03
Displays the atmospheric pressure.
Compare the actually measured atmospheric pressure with the
meter display value.
Displays the intake air pressure.
Set the engine stop switch to "
while pushing the start switch " ". (If the display value changes,
the performance is OK.)
Check or maintenance job
Replace the ECU.
21
Coolant temperature sensor: open or short circuit detected. (no nor-
mal signals are received from the coolant temperature sensor.)
Able to start engine
Able to drive vehicle
d:06
Displays the coolant temperature.
Compare the actually measured coolant temperature with the meter
display value.
Check or maintenance job
Poor connection → Connect it
securely, or repair/replace the
wire harness.
Poor connection → Connect it
securely, or repair/replace the
wire harness.
FUEL INJECTION SYSTEM
", and then operate the throttle
8-67
Sensor inspection proce-
dure
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.
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.