Yamaha Star XVS950A 2009 Service Manual page 326

Fault code No.
Symptom
Fail-safe action
Diagnostic monitor-
ing code No.
Meter display
Checking method
Order
5
6
7
15
Open or short circuit of throttle position sensor lead
Engine startup: Possible under certain conditions
Riding: Possible under certain conditions
01
Display the throttle opening (between 0 and 125 degrees)
When throttle is fully closed: 15 to 18 degrees
When throttle is fully opened: 97 to 102 degrees
Check the values when the throttle is fully closed and opened.
Item/components and
probable cause
Supply voltage of throt-
tle position sensor lead
Throttle position sensor
malfunction
ECU malfunction
FUEL INJECTION SYSTEM
Check or mainte-
nance job
Check the supply volt-
age.
(Black/Blue–Yellow)
Refer to "CHECKING
THE THROTTLE POSI-
TION SENSOR" on
page 7-104.
Line discon- Output
nection points voltage
Disconnec- 5 V
tion of ground
lead
Disconnec- 0 V
tion of output
line
Disconnec- 0 V
tion of power
supply line
Check in the diagnostic
mode (Code No. 01).
When throttle is fully
closed: A value of 15–
16 is indicated.
When throttle is fully
opened: A value of 97–
102 is indicated.
If the indication is out-
side of range: Replace
the throttle position
sensor.
Replace the ECU.
7-39
Sensor inspection
procedure
Repair/replace the wire
harness, or replace the
ECU (common to sepa-
rate and integration
models.)
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.