Yamaha Star XVS950A 2009 Service Manual page 338

Fault code No.
Symptom
Fail-safe action
Diagnostic monitor-
ing code No.
Meter display
Checking method
Order
2
3
4
5
34
Rear cylinder ignition coil primary lead malfunction
Engine startup: Possible (depending on the number of failed cylin-
ders)
Riding: Possible (depending on the number of failed cylinders)
31
Each ignition coil turns On or Off 5 times per second.
The engine warning light flashes according to the On/Off switching.
Make sure that the engine warning light flashes according to the On/
Off switching of ignition coil.
Item/components and
probable cause
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
Ignition coil installation
status
Ignition coil malfunction
(Check the resistance
of rear cylinder ignition
coil.)
FUEL INJECTION SYSTEM
Check or mainte-
nance job
Poor connection →
Connect it securely or
repair/replace the wire
harness.
Open or short circuit →
Replace the wire har-
ness.
Gray/Red–Gray/Red
Check the connection
of the coupler is
secure.
Make sure that the
mounting position is
correct.
Refer to "CHECKING
THE IGNITION COILS"
on page 7-98.
Ignition coil inspection
method
7-51
Sensor inspection
procedure
Start and idle the
engine for approxi-
mately 5 seconds.
Then, check the fault
code indication.
No fault code indicated.
→ Recovered.
Fault code indicated. →
Check the next step.
Start and idle the
engine for approxi-
mately 5 seconds.
Then, check the fault
code indication.
No fault code indicated.
→ Recovered.
Fault code indicated. →
Check the next step.
Start and idle the
engine for approxi-
mately 5 seconds.
Then, check the fault
code indication.
No fault code indicated.
→ Recovered.
Fault code indicated. →
Check the next step.
Start and idle the
engine for approxi-
mately 5 seconds.
Then, check the fault
code indication.
No fault code indicated.
→ Recovered.
Fault code indicated. →
Check the next step.