Yamaha WR450FB 2012 Owner's Service Manual page 339

FUEL INJECTION SYSTEM
Fault code No. 15
Item
Throttle position sensor: open or short circuit detected.
2 Connection of wire harness
Improperly connected
4
Set the main switch to "ON".
ECU coupler. Connect the coupler securely Fault code number is not dis-
Check the locking condition
or repair/replace the wire har- played
4
Service is finished.
of the coupler. ness. ·Fault code number is dis-
Disconnect the coupler and played
4
Go to next order.
check the pins (bent or bro-
ken terminals and locking
condition of the pins).
3 Connection of sub wire har-
Improperly connected
4
Set the main switch to "ON".
ness coupler. Connect the coupler securely Fault code number is not dis-
Check the locking condition or repair/replace the sub wire played
4
Service is finished.
of the coupler.
harness. Fault code number is dis-
Disconnect the coupler and played
4
Go to next order.
check the pins (bent or bro-
ken terminals and locking
condition of the pins).
4 Wire harness continuity. Open or short circuit
4
Re- Set the main switch to "ON".
place the wire harness.
Fault code number is not dis-
Between throttle position
played
4
Service is finished.
I
sensor coupler and ECU cou- Fault code number is dis-
pier. played
4
Go to next order.
black/blue-black/blue
yellow-yellow
blue-blue
5 Installed condition of throttle
Improperly installed sensor
Set the main switch to "ON".
position sensor.
4
Reinstall or replace the Fault code number is not dis-
Check for looseness or
sensor.
played
4
Service is finished.
pinching. Refer to "ADJUSTING THE Fault code number is dis-
THROTTLE POSITION SEN- played
4
Go to next order.
SOR" on page 8-9.
6
Applied voltage of throttle po- Check the applied voltage.
Set the main switch to "ON".
sition sensor lead.
(black/blue-blue)
Fault code number is not dis-
Refer to "CHECKING THE
played
~
Service is finished.
THROTTLE POSITION SEN- Fault code number is dis-
SOR" on page 9-76. played
~
Go to next order.
Location of discon- Output
nected lead voltage
Disconnected 5V
ground lead
Disconnected out- OV
put lead
Disconnected
ov
power supply lead
7 Defective throttle position
Execute the diagnostic mode. Set the main switch to "ON".
sensor.
(Code No. d:01)
Fault code number is not dis-
Replace if defective. played~
Service is finished.
Fault code number is dis-
played
~
Go to next order.
8 Malfunction in ECU.
Replace the ECU.
9-38