Open Or Short Circuit Of Intake Air Temperature Sensor Lead - Yamaha 2009 YZF-R1 (Y) Service Manual

Fault code No.
Symptom
Fail-safe action
Diagnostic monitor-
ing code No.
Meter display
Checking method
Item/components and
probable cause
6 Coolant temperature sensor
malfunction
7 ECU malfunction
* Check the sensor only when the engine is cold.
Fault code No.
Symptom
Fail-safe action
Diagnostic monitor-
ing code No.
Meter display
Checking method
Item/components and
probable cause
1 Connection of intake air tem-
perature sensor coupler
Check the connection of the
coupler is secure.
Remove the coupler, and
check each pin (for bending,
wear, or locking).
2 Connection of main harness
ECU coupler
Check the connection of the
coupler is secure.
Remove the coupler, and
check each pin (for bending,
wear, or locking).
21
Open or short circuit of coolant temperature sensor lead
Engine startup: Possible
Riding: Possible
D:06
When engine is cold: Displays temperature closer to air temperature
When engine is hot: Displays current coolant temperature
Compare the actually measured coolant temperature with the meter
display value.
Check or maintenance job
Check in the diagnostic mode
(Code No. 06).
During cold starting: A tem-
perature close to the ambient
temperature is indicated.
Indication is incorrect. →
Replace the coolant tempera-
ture sensor.
Replace the ECU.
22

Open or short circuit of intake air temperature sensor lead

Engine startup: Possible
Riding: Possible
D:05
When engine is cold: Displays temperature closer to air temperature
When engine is hot: Air temperature + approx. 20 °C (68 °F)
Compare the actually measured intake air temperature with the
meter display value.
Check or maintenance job
Poor connection → Connect
it securely, or repair/replace
the wire harness.
Poor connection → Connect
it securely, or repair/replace
the wire harness.
FUEL INJECTION SYSTEM
8-59
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.
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.
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.