Yamaha 2009 YZF-R1 (Y) - Open or Short Circuit of Atmospheric Pressure Sensor Lead

FUEL INJECTION SYSTEM
8-61
Fault code No. 23
Symptom Open or short circuit of atmospheric pressure sensor lead
Fail-safe action
Engine startup: Possible
Riding: Possible
Diagnostic monitor-
ing code No.
D:02
Meter display Displays the atmospheric pressure.
Checking method
Compare the actually measured atmospheric pressure with the
meter display value.
Item/components and
probable cause
Check or maintenance job
Sensor inspection proce-
dure
1 Connection of atmospheric
pressure sensor coupler
Check the connection of the
coupler is secure.
Remove the coupler, and
check each pin (for bending,
wear, or locking).
Poor connection → Connect
it securely, or replace the
wire harness.
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.
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).
Poor connection → Connect
it securely, or replace the
wire harness.
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.
3 Continuity of wire harness Open or short circuit →
Replace the wire harness.
Black/Blue–Black/Blue
Pink–Pink
Blue–Blue
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.