Yamaha 2016 Grizzly yf700gg, Service Manual, Page: 395 / 474

FUEL INJECTION SYSTEM
9-40
1 Connection of throttle position
sensor coupler.
Check the locking condition of
the coupler.
Disconnect the coupler and
check the pins (bent or broken
terminals and locking condition
of the pins). Improperly connected
→
Con-
nect the coupler securely or re-
place the wire harness.
Turn the main switch to “ ”
(on).
Fault code number is not dis-
played
→
Service is finished.
Fault code number is displayed
→
Go to item 2.
2 Connection of ECU coupler.
Check the locking condition of
the coupler.
Disconnect the coupler and
check the pins (bent or broken
terminals and locking condition
of the pins). Improperly connected
→
Con-
nect the coupler securely or re-
place the wire harness.
Turn the main switch to “ ”
(on).
Fault code number is not dis-
played
→
Service is finished.
Fault code number is displayed
→
Go to item 3.
3 Wire harness continuity. Open or short circuit
→
Replace
the wire harness.
Between throttle position sensor
coupler and ECU coupler.
yellow–yellow
Between throttle position sensor
coupler and joint coupler.
blue–blue
black/blue–black/blue
Between joint coupler and ECU
coupler.
blue–blue
black/blue–black/blue
Turn the main switch to “ ”
(on).
Fault code number is not dis-
played
→
Service is finished.
Fault code number is displayed
→
Go to item 4.
4 Installed condition of throttle po-
sition sensor.
Check for looseness or pinch-
ing. Improperly installed sensor
→
Reinstall or adjust the sensor.
Refer to “ADJUSTING THE
THROTTLE POSITION SEN-
SOR” on page 7-7.
Turn the main switch to “ ”
(on).
Fault code number is not dis-
played
→
Service is finished.
Fault code number is displayed
→
Go to item 5.
5 Throttle position sensor resis-
tance. Measure the throttle position
sensor resistance.
Refer to “CHECKING THE
THROTTLE POSITION SEN-
SOR” on page 9-96. Turn the main switch to “ ”
(on).
Fault code number is not dis-
played
→
Service is finished.
Fault code number is displayed
→
Go to item 6.
6 Defective throttle position sen-
sor. Check throttle position sensor
signal.
Execute the diagnostic mode.
(Code No. 01)
When the throttle valve is fully
closed:
A value of 14–20 is indicated.
An indicated value is out of the
specified range
→
Replace the
throttle position sensor.
Turn the main switch to “ ”
(on).
Fault code number is not dis-
played
→
Service is finished.
Fault code number is displayed
→
Go to item 7.
7 Malfunction in ECU. Replace the ECU.
Fault code No. 15
Item Throttle position sensor: open or short circuit detected.