Yamaha Star XVS950A 2009 Service Manual page 355

Fault code No.
Symptom
Fail-safe action
Diagnostic monitor-
ing code No.
Meter display
Checking method
Order
1
2
3
4
5
Er-4
No registration data can be received from the meter unit.
Engine startup: Impossible
Riding: Impossible
—
—
—
Item/components and
probable cause
Connection of meter
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
Abnormal meter unit
operation
ECU malfunction
FUEL INJECTION SYSTEM
Check or mainte-
nance job
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.
Yellow/Blue–Yellow/
Blue
Replace the meter unit.
Replace the ECU.
7-68
Sensor inspection
procedure
Place the main switch
to the ON position.