Yamaha YZF-R1(B) 2012 Service Manual page 455

Fault code No.
Symptom
Fail-safe action
Diagnostic monitor-
ing code No.
Meter display
D:03
Checking
method
Meter display
D:02
Checking
method
Item/components and
probable cause
2 Atmospheric pressure sensor
malfunction
3 ECU malfunction
* Check the sensor only when the engine is cold.
20
When the main switch is ON, there is a big difference in voltage
value of the intake air pressure sensor and atmospheric pressure
sensor
Engine startup: Possible
Riding: Possible
D:03
D:02
Displays the intake air pressure.
Set the engine stop switch to "
" ". (If the display value changes, the performance is OK.)
Displays the atmospheric pressure.
Compare the actually measured atmospheric pressure with the
meter display value.
Check or maintenance job
Check in the diagnostic mode
(Code No. 02).
When engine is stopped:
Atmospheric pressure at the
current altitude and weather
conditions is indicated.
0 m above sea level: Approx.
101 kPa
3000 m above sea level:
Approx. 70 kPa
Incorrect indication → Sensor
malfunction → Replace the
atmospheric pressure sen-
sor.
Sensor inspection procedure.
Refer to "CHECKING THE
ATMOSPHERIC PRES-
SURE SENSOR" on page 8-
145.
Replace the ECU.
FUEL INJECTION SYSTEM
", and then push the start switch
8-58
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.