Fault Code 14 - Yamaha FZ8NA Service Manual

Fault code No.
Item
Fail-safe system
Diagnostic code No.
Meter display
Procedure
Item/components and
probable cause
1 The intake air pressure sen-
sor hose is damaged, discon-
nected, clogged, twisted or
bent.
2 Intake air pressure sensor
malfunction
3 ECU malfunction
TIP
If fault codes 13 and 14 are indicated simultaneously, take the actions specified for fault code 13
first.
14
Intake air pressure sensor: hose system malfunction (clogged or
detached hose).
Able to start engine
Able to drive vehicle
d:03
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
Repair or replace the sensor
hose.
Check in the diagnostic mode
(Code No. d03).
When engine is stopped:
Atmospheric pressure at the
current altitude and weather
conditions is indicated.
0 m above sea level: Approx.
101 kPa
1000 m above sea level:
Approx. 90 kPa
2000 m above sea level:
Approx. 80 kPa
3000 m above sea level:
Approx. 70 kPa
When engine is cranking:
Make sure that the indication
value changes.
The value does not change
when engine is cranking. →
Replace the intake air pres-
sure sensor.
Sensor inspection procedure
Refer to "CHECKING THE
INTAKE AIR PRESSURE
SENSOR" on page 8-201.
Replace the ECU.
FUEL INJECTION SYSTEM
", and then operate the throttle
8-60
Sensor inspection proce-
dure
Start and idle the engine for
approximately 5 seconds.
Then, check the fault code
indication.
No fault code indicated. →
Recovered.
Fault code indicated. →
Check the next step.