Yamaha 2016 Grizzly yf700gg, Service Manual

Page: 406 / 474

FUEL INJECTION SYSTEM
9-51
Procedure
Check that the number increases when the rear wheels are rotated. The
number is cumulative and does not reset each time the wheel is stopped.
Item
Probable cause of malfunc-
tion and check
Maintenance job
Confirmation of service com-
pletion
1 Connection of speed 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), and then rotate the rear
wheel by hand.
Fault code number is not dis-
played
→
Go to item 6.
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), and then rotate the rear
wheel by hand.
Fault code number is not dis-
played
→
Go to item 6.
Fault code number is displayed
→
Go to item 3.
3 Wire harness continuity. Open or short circuit
→
Replace
the wire harness.
Between speed sensor coupler
and joint coupler.
white–white
Between joint coupler and ECU
coupler.
white–white
Between speed 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), and then rotate the rear
wheel by hand.
Fault code number is not dis-
played
→
Go to item 6.
Fault code number is displayed
→
Go to item 4.
4 Defective speed sensor. Execute the diagnostic mode.
(Code No. 07)
While the rear wheels and
stopped, check that the indicat-
ed value does not change.
Rotate the rear wheel by hand
and check that the indicated
value increases.
Malfunction
→
Replace the
speed sensor.
Turn the main switch to “ ”
(on), and then rotate the rear
wheel by hand.
Fault code number is not dis-
played
→
Go to item 6.
Fault code number is displayed
→
Go to item 5.
5 Malfunction in ECU. Replace the ECU.
6 Delete the fault code. Start the engine, and input the
vehicle speed signals by operat-
ing the vehicle at 20 to 30 km/h
(12 to 19 mph).
Check that the fault code num-
ber is not displayed.
Fault code No. 42
Item
Speed sensor: no normal signals are received from the speed sen-
sor.