FUEL INJECTION SYSTEM
9-42
TIP
• Make sure that the engine is completely cool before checking the coolant temperature sensor.
• Before troubleshooting, disconnect the starter motor lead from the starter relay.
Fault code No.
21
Item
Coolant temperature sensor: open or short circuit detected.
Fail-safe system
Able to start engine
Able to drive vehicle
Diagnostic code No.
06
Diagnostic tool display
Displays the coolant temperature.
Procedure
Compare the actually measured coolant 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 coolant 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.
3
Wire harness continuity.
Open or short circuit
Re-
place the wire harness.
Between coolant temperature
sensor coupler and ECU cou-
pler.
green/white–green/white
black/blue–black/blue
Push the start switch.
Fault code number is not dis-
played
Service is finished.
Fault code number is dis-
played
Go to item 4.
4
Installed condition of coolant
temperature sensor.
Check for looseness or
pinching.
Improperly installed sensor
Reinstall or replace the
sensor.
Push the start switch.
Fault code number is not dis-
played
Service is finished.
Fault code number is dis-
played
Go to item 5.
Summary of Contents for WR250F 2016
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 EAS2GB7073 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 142: ...ELECTRICAL SYSTEM 3 42 ...
Page 152: ...CHASSIS 4 9 ...
Page 162: ...FRONT WHEEL 5 8 1 1 ...
Page 226: ...CHAIN DRIVE 5 72 ...
Page 290: ...OIL PUMP AND BALANCER GEAR 6 61 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 310: ...TRANSMISSION 6 81 ...
Page 347: ...CHARGING SYSTEM 9 15 ...
Page 351: ...LIGHTING SYSTEM 9 19 ...
Page 359: ...COOLING SYSTEM 9 27 ...
Page 391: ...FUEL PUMP SYSTEM 9 59 ...
Page 394: ...ELECTRICAL COMPONENTS 9 62 12 11 10 2 3 1 6 7 4 5 8 9 ...
Page 396: ...ELECTRICAL COMPONENTS 9 64 EAS2GB7383 CHECKING THE SWITCHES 4 1 3 2 E B S E B E B E E B B ...
Page 414: ...ELECTRICAL COMPONENTS 9 82 ...
Page 425: ......
Page 426: ...PRINTED IN JAPAN E PRINTED ON RECYCLED PAPER ...