TROUBLESHOOTING
9-1
EAM20148
TROUBLESHOOTING
EAM30309
GENERAL INFORMATION
TIP
Troubleshooting information provided here does not cover all the trouble symptoms, possible causes,
and remedial actions. Some items may not apply depending on the model. Use this information as a
guide and quick reference matrix when performing basic troubleshooting. Refer to the each chapter for
detailed information on checking, adjustment, and replacement.
EAM30509
TROUBLESHOOTING OF ENGINE (fault code not detected)
TIP
If a fault code is detected, refer to the “FUEL INJECTION SYSTEM” on page 8-27.
Engine does not crank.
Engine will not start or is difficult to start, but it cranks.
Symptom
Possible cause
Actions
Starter motor does not operate
Refer to “TROUBLESHOOTING” under “ELECTRIC STARTING
Starter motor operates, but the
engine does not crank.
Starter clutch malfunction
Replace the starter clutch.
Improper oil grade (starter clutch
slipping)
Change to recommended engine
oil.
Stuck piston or seized crankshaft
Disassemble and check the
engine. Replace defective parts.
Symptom
Possible cause
Actions
Spark plug does not produce a
spark
Refer to “TROUBLESHOOTING” under “IGNITION SYSTEM” on page
Fuel not supplied
—
Measure the fuel pressure.
Empty fuel tank
Fill the fuel tank with fuel.
Clogged fuel tank cap breather
hole
Clean the fuel tank cap.
Clogged or damaged fuel hose
Clean, repair, or replace the fuel
hose.
Fuel leakage
Check the fuel passage. Repair or
replace as necessary.
Clogged fuel pump
Clean or replace the fuel pump.
Cracks or damage in fuel pump
Replace the fuel pump.
Fuel pump malfunction
Refer to “TROUBLESHOOTING”
Failed or clogged fuel injector
Replace the fuel injector.
ECU failure
Replace the ECU.
Содержание WR250FM 2021
Страница 5: ...EAM20093 YAMAHA MOTOR CORPORATION U S A WR MOTORCYCLE LIMITED WARRANTY...
Страница 8: ......
Страница 10: ......
Страница 52: ...MOTORCYCLE CARE AND STORAGE 1 40...
Страница 62: ...ELECTRICAL SPECIFICATIONS 2 9 Radiator fan motor fuse 5 0 A Spare fuse 15 0 A...
Страница 70: ...CABLE ROUTING DIAGRAM 2 17 EAM20152 CABLE ROUTING DIAGRAM Frame and engine left side view...
Страница 72: ...CABLE ROUTING DIAGRAM 2 19 Frame and engine right side view...
Страница 74: ...CABLE ROUTING DIAGRAM 2 21 Handlebar front view...
Страница 76: ...CABLE ROUTING DIAGRAM 2 23 Frame and engine top view...
Страница 78: ...CABLE ROUTING DIAGRAM 2 25 Frame and battery top view...
Страница 80: ...CABLE ROUTING DIAGRAM 2 27 Rear brake right side view...
Страница 82: ...CABLE ROUTING DIAGRAM 2 29 Front brake front view and right side view...
Страница 84: ...CABLE ROUTING DIAGRAM 2 31 Taillight top view and right side view...
Страница 86: ...CABLE ROUTING DIAGRAM 2 33...
Страница 131: ...GENERAL CHASSIS 4 5 a Projection b Slot c Rib side cover d Rib rear fender a a a 1 1 c c b b d d...
Страница 203: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 5 3 1 Oil filter element 2 Oil pump...
Страница 204: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 5 4 1 Intake camshaft 2 Exhaust camshaft...
Страница 205: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 5 5 1 Camshaft 2 Oil pressure check bolt 3 Oil pump 4 Oil filter element...
Страница 259: ...SHIFT SHAFT 5 59 TIP Align the punch mark a on the shift shaft with the punch mark b in the shift pedal 1 1 2 2 a b...
Страница 265: ...OIL PUMP 5 65 A Primary drive gear side B Crankcase cover side 5 7 mm 0 02 0 28 in 5 c d 6 8 b 8 6 7 E...
Страница 278: ...TRANSMISSION 5 78...
Страница 288: ...WATER PUMP 6 9...
Страница 298: ...THROTTLE BODY 7 9...
Страница 301: ......
Страница 302: ...IGNITION SYSTEM 8 1 EAM20142 IGNITION SYSTEM EAM30277 CIRCUIT DIAGRAM...
Страница 306: ...ELECTRIC STARTING SYSTEM 8 5 EAM20143 ELECTRIC STARTING SYSTEM EAM30279 CIRCUIT DIAGRAM...
Страница 312: ...CHARGING SYSTEM 8 11 EAM20144 CHARGING SYSTEM EAM30282 CIRCUIT DIAGRAM...
Страница 315: ...CHARGING SYSTEM 8 14...
Страница 316: ...SIGNALING SYSTEM 8 15 EAM20154 SIGNALING SYSTEM EAM30348 CIRCUIT DIAGRAM...
Страница 320: ...LIGHTING SYSTEM 8 19 EAM20153 LIGHTING SYSTEM EAM30346 CIRCUIT DIAGRAM...
Страница 323: ...LIGHTING SYSTEM 8 22...
Страница 324: ...COOLING SYSTEM 8 23 EAM20155 COOLING SYSTEM EAM30350 CIRCUIT DIAGRAM...
Страница 327: ...COOLING SYSTEM 8 26...
Страница 328: ...FUEL INJECTION SYSTEM 8 27 EAM20145 FUEL INJECTION SYSTEM EAM30284 CIRCUIT DIAGRAM...
Страница 353: ...FUEL INJECTION SYSTEM 8 52...
Страница 354: ...FUEL PUMP SYSTEM 8 53 EAM20146 FUEL PUMP SYSTEM EAM30287 CIRCUIT DIAGRAM...
Страница 388: ...SELF DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE 9 15...
Страница 398: ...CHASSIS 10 9...
Страница 400: ......
Страница 402: ......
Страница 403: ...WR250FM 2021 WIRING DIAGRAM BAK 2819U 11_W D indd 1 2020 07 01 12 01 28...
Страница 404: ...WR250FM 2021 WIRING DIAGRAM BAK 2819U 11_W D indd 2 2020 07 01 12 01 28...