Yamaha V Star 950 Service Manual page 339

Fault code No.
Symptom
Fail-safe action
Diagnostic monitor-
ing code No.
Meter display
Checking method
Order
1
2
3
4
5
39
Open or short circuit of injector lead
Engine startup: Possible
Riding: Possible
36
37
When engine is stopped: Make sure that the atmospheric pressure
is indicated.
When engine is cranking: The indication value changes because the
injector changes.
Item/components and
probable cause
Connection of injector
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
Injector malfunction
ECU malfunction
7-54
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 →
Replace the wire har-
ness.
White–White
Green–Green
Gray–Gray
Check in the diagnos-
tic mode (Code No. 36,
37).
Replace the ECU.
Sensor inspection
procedure
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.
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.