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FUEL INJECTION SYSTEM
9-54
TIP
Before troubleshooting, disconnect the starter motor lead from the starter motor.
4
Yamaha diagnostic tool mal-
function.
Replace the Yamaha diag-
nostic tool.
Push the start switch.
Fault code number is not dis-
played
Service is finished.
Fault code number is dis-
played
Go to item 5.
5
Malfunction in ECU.
Replace the ECU.
Fault code No.
Er-3
Item
Data from the ECU cannot be received correctly.
Fail-safe system
Able to start engine
Able to drive vehicle
Diagnostic code No.
—
Diagnostic tool display
—
Procedure
—
Item Probable cause of malfunc-
tion and check
Maintenance job
Confirmation of service
completion
1
Connection of Yamaha diag-
nostic tool 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.
light green–light green
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
Yamaha diagnostic tool mal-
function.
Replace the Yamaha diag-
nostic tool.
Push the start switch.
Fault code number is not dis-
played
Service is finished.
Fault code number is dis-
played
Go to item 5.
5
Malfunction in ECU.
Replace the ECU.
Fault code No.
Er-2
Item
Signals from the ECU cannot be received within the specified
period of time.
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...