Yamaha Star XVS950A 2009 Service Manual page 331

Fault code No.
Symptom
Fail-safe action
Diagnostic monitor-
ing code No.
Meter display
Checking method
Order
1
2
3
4
5
24
The O sensor does not operate.
2
Engine startup: Possible
Riding: Possible
—
—
—
Item/components and
probable cause
O sensor installation
2
status
Connection of O sen-
2
sor coupler
Check the connection
of the coupler is
secure.
Remove the coupler,
and check each pin (for
bending, wear, or lock-
ing).
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 lock-
ing).
Continuity of wire har-
ness
Check the fuel pres-
sure.
FUEL INJECTION SYSTEM
Check or mainte-
nance job
Check the sensor for a
loose mounting or a
pinch
Poor connection →
Connect it securely, or
repair/replace the wire
harness.
Poor connection →
Connect it securely, or
repair/replace the wire
harness.
Open or short circuit →
Connect it securely, or
repair/replace the wire
harness.
Black/Blue–Black/Blue
Gray/White–Gray/
White
Red/Blue–Red/Blue
Gray/Green–Gray/
Green
Refer to "CHECKING
THE FUEL PRES-
SURE" on page 6-11.
7-44
Sensor inspection
procedure
Either start and warm
up the engine, and then
racing it, or reset it with
diagnostic code D63.