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FUEL INJECTION SYSTEM
9-43
TIP
• Make sure that the engine is completely cool before checking the intake air temperature sensor.
• Before troubleshooting, disconnect the starter motor lead from the starter relay.
5
Defective coolant tempera-
ture sensor.
Execute the diagnostic mode.
(Code No. 06)
When engine is cold:
Displayed temperature is
close to the ambient temper-
ature.
The displayed temperature is
not close to the ambient tem-
perature.
Check the cool-
ant temperature sensor.
Replace if defective.
Push the start switch.
Fault code number is not dis-
played
Service is finished.
Fault code number is dis-
played
Go to item 6.
6
Malfunction in ECU.
Replace the ECU.
Fault code No.
22
Item
Intake air temperature sensor: open or short circuit detected.
Fail-safe system
Able to start engine
Able to drive vehicle
Diagnostic code No.
05
Diagnostic tool display
Displays the intake air temperature.
Procedure
Compare the actually measured intake air temperature with the
Yamaha diagnostic tool display value.
Item Probable cause of malfunc-
tion and check
Maintenance job
Confirmation of service
completion
1
Connection of intake air tem-
perature sensor coupler.
Check the locking condition
of the coupler.
Disconnect the coupler and
check the pins (bent or bro-
ken terminals and locking
condition of the pins).
Improperly connected
Connect the coupler securely
or repair/replace the wire har-
ness.
Push the start switch.
Fault code number is not dis-
played
Service is finished.
Fault code number is dis-
played
Go to item 2.
2
Connection of wire harness
ECU coupler.
Check the locking condition
of the coupler.
Disconnect the coupler and
check the pins (bent or bro-
ken terminals and locking
condition of the pins).
Improperly connected
Connect the coupler securely
or repair/replace the wire har-
ness.
Push the start switch.
Fault code number is not dis-
played
Service is finished.
Fault code number is dis-
played
Go to item 3.
Fault code No.
21
Item
Coolant temperature sensor: open or short circuit detected.
Summary of Contents for WR250F 2017
Page 4: ......
Page 10: ......
Page 12: ......
Page 16: ...LOCATION OF IMPORTANT LABELS 1 2 EUR...
Page 17: ...LOCATION OF IMPORTANT LABELS 1 3 AUS NZL ZAF...
Page 41: ...MULTI FUNCTION DISPLAY 1 27...
Page 78: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 25...
Page 80: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 27...
Page 82: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 29...
Page 84: ...CABLE ROUTING DIAGRAM 2 31 EAS2GBB073 CABLE ROUTING DIAGRAM...
Page 86: ...CABLE ROUTING DIAGRAM 2 33...
Page 88: ...CABLE ROUTING DIAGRAM 2 35...
Page 90: ...CABLE ROUTING DIAGRAM 2 37...
Page 92: ...CABLE ROUTING DIAGRAM 2 39...
Page 94: ...CABLE ROUTING DIAGRAM 2 41...
Page 96: ...CABLE ROUTING DIAGRAM 2 43...
Page 98: ...CABLE ROUTING DIAGRAM 2 45...
Page 152: ...CHASSIS 4 9...
Page 162: ...FRONT WHEEL 5 8 1 1...
Page 226: ...CHAIN DRIVE 5 72...
Page 270: ...ELECTRIC STARTER 6 41...
Page 294: ...OIL PUMP AND BALANCER GEAR 6 65 a 2 10 b 2 9 1 b 5 3 a 4 10 5 9 3 E c d 6 7 8 8 b 6...
Page 300: ...GENERATOR AND STARTER CLUTCH 6 71 1 a 3 3 2 4...
Page 351: ...CHARGING SYSTEM 9 15...
Page 355: ...LIGHTING SYSTEM 9 19...
Page 363: ...COOLING SYSTEM 9 27...
Page 395: ...FUEL PUMP SYSTEM 9 59...
Page 396: ...ELECTRICAL COMPONENTS 9 60 EAS2GBB381 ELECTRICAL COMPONENTS EAS2GBB382 9 10 11 1 3 2 4 5 6 7 8...
Page 398: ...ELECTRICAL COMPONENTS 9 62 12 11 10 2 3 1 6 7 4 5 8 9...
Page 400: ...ELECTRICAL COMPONENTS 9 64 EAS2GBB383 CHECKING THE SWITCHES 4 1 3 2 B B Sb B B B B B B B B...
Page 418: ...ELECTRICAL COMPONENTS 9 82...
Page 429: ......
Page 430: ...PRINTED IN JAPAN E PRINTED ON RECYCLED PAPER...