Yamaha Grizzly550 User Manual page 382

Fault code No. 15
Diagnostic code No.
Order Item/components and probable
cause
1 Installed condition of throttle position
sensor.
2 Connections
• Throttle position sensor coupler
• Main wire harness-ECU coupler
3 Open or short circuit in wire harness.
4 Throttle position sensor lead wire
open circuit output voltage check.
5 Defective throttle position sensor.
Symptom Throttle position sensor: open or short circuit detected.
d01 Throttle position sensor
Check or maintenance job
• Check for looseness or pinch-
• Check that the sensor is in-
• Check the coupler for any pins
• Check the locking condition of
• If there is a malfunction, repair it
• Repair or replace if there is an
• Between throttle position sen-
• Check for open circuit and re-
• Execute the diagnostic mode.
• Replace if defective.
9-45
FUEL INJECTION SYSTEM
ing.
stalled in the specified position.
that may have pulled out.
the coupler.
and connect the coupler se-
curely.
open or short circuit.
sor coupler and ECU coupler
(black/blue–black/blue)
(yellow–yellow)
(blue–blue)
place the throttle position sen-
sor.
(Yellow–Black/Blue)
(Code No. d01)
Refer to "CHECKING THE
THROTTLE POSITION SEN-
SOR" on page 9-96.
Reinstatement
method
Setting the
main switch to
"ON".