Yamaha 2009 YZF-R1 (Y) - Page 451

FUEL INJECTION SYSTEM
8-60
3 Continuity of wire harness Open or short circuit →
Replace the wire harness.
Black/Blue–Black/Blue
Brown/White–Brown/White
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.
4 Installation status of intake
air temperature sensor
Check the mounting section
for a loose or pinched mount-
ing.
Make sure that the mounting
position is correct.
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.
5 Intake air temperature sensor
malfunction
Check in the diagnostic mode
(Code No. 05).
Sensor inspection procedure
Refer to “CHECKING THE
INTAKE AIR TEMPERA-
TURE SENSOR” on page 8-
142.
During cold starting: A tem-
perature close to the ambient
temperature is indicated.
Indication is incorrect. →
Replace the intake air tem-
perature sensor.
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.
6 ECU malfunction Replace the ECU
Fault code No. 22
Symptom Open or short circuit of intake air temperature sensor lead
Fail-safe action
Engine startup: Possible
Riding: Possible
Diagnostic monitor-
ing code No.
D:05
Meter display
When engine is cold: Displays temperature closer to air temperature
When engine is hot: Air temperature + approx. 20 °C (68 °F)
Checking method
Compare the actually measured intake air temperature with the
meter display value.
Item/components and
probable cause
Check or maintenance job
Sensor inspection proce-
dure