Yamaha 2009 YZF-R1 (Y) Service Manual page 440

Fault code No.
Symptom
Fail-safe action
Diagnostic monitor-
ing code No.
Meter display
Checking method
Item/components and
probable cause
5 Intake air pressure sensor
malfunction
6 ECU malfunction
13
Open or short circuit of intake air pressure sensor lead
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
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.
Incorrect indication → Sensor
malfunction → Replace the
intake air pressure sensor.
Sensor inspection procedure
Refer to "CHECKING THE
INTAKE AIR PRESSURE
SENSOR" on page 8-141.
Replace the ECU.
FUEL INJECTION SYSTEM
", and then push the start switch
8-49
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.