Yamaha YZFR1Y(C) 2009 Service Manual page 436

If fault codes 13 and 14 are indicated simultaneously, take the actions specified for fault code 13
first.
Fault code No.
Symptom
Fail-safe action
Diagnostic monitor-
ing code No.
Meter display
Checking method
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
14
The intake air pressure sensor has failed (due to clogging of hose or
sensor disconnection).
Engine startup: Possible
Riding: Possible
D:03
Displays the intake air pressure.
Set the engine stop switch to "
" ". (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. 03).
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 8-125.
Replace the ECU.
8-49
FUEL INJECTION SYSTEM
", and then push the start switch
Sensor inspection proce-
Starting the engine and oper-
ating it at idle.
Fully close the throttle and
check the fault recovery.
dure