Yamaha WR250F 2016 Owner's Service Manual page 373

Fault code No.
Item
7 Malfunction in ECU.
TIP
Before troubleshooting, disconnect the starter motor lead from the starter relay.
Fault code No.
Item
Fail-safe system
Diagnostic code No.
Diagnostic tool display
Procedure
Probable cause of malfunc-
Item
tion and check
1 Installed condition of throttle
position sensor.
Check for looseness or
pinching.
2 Defective throttle position
sensor.
3 Malfunction in ECU.
15
Throttle position sensor: open or short circuit detected.
Replace the ECU.
16
Throttle position sensor: stuck throttle position sensor is de-
tected.
Able to start engine
Able to drive vehicle
01
Throttle position sensor signal
• 11–14 (fully closed position)
• 109–116 (fully open position)
• Check with throttle valve fully closed.
• Check with throttle valve fully open.
Maintenance job
Improperly installed sensor
 Reinstall or replace the
sensor.
Refer to "ADJUSTING THE
THROTTLE POSITION SEN-
SOR" on page 8-11.
Check throttle position sen-
sor signal.
Execute the diagnostic mode.
(Code No. 01)
When the throttle valve is fully
closed:
A value of 11–14 is indicated.
When throttle valve is fully
open:
A value of 109–116 is indicat-
ed.
An indicated value is out of
the specified range.  Re-
place the throttle position
sensor.
Replace the ECU.
9-41
FUEL INJECTION SYSTEM
Confirmation of service
completion
Push the start switch.
Fault code number is not dis-
played  Service is finished.
Fault code number is dis-
played  Go to item 2.
Push the start switch.
Fault code number is not dis-
played  Service is finished.
Fault code number is dis-
played  Go to item 3.