1997-2001 Honda TRX250 Fourtrax Recon Service Manual, Page 297Get this manual
IGNITION SYSTEM
TROUBLESHOOTING
-Inspect the fol lowing before diagnosing the system- Fau lty spark plugLoose spark plug cap or spark plug wire connectionWater got into the spark plug cap (leaking the ignition coil secondary voltage)
No spark at lugProbable cause (Check in numerical r-=:= r)'-_ ::: e"' 1The multimeter impedance is too low2Cranking speed is too low3The sampling time of the tester and measured pulse were not synchronized (System is normal if measured voltage is over the standard vo ltage at least onel4Poorly connected connector or an open circuit in igni tion system5Faulty ignition coil (Measure the peak voltage!1 ::_- -, :-=:: Faulty leM (when above No1are normal ) i 6No peak voltage 1I ncorrect peak vo ltage adaptor connections 2Faulty engine stop switch 3Loose or poorly connected leM connector4An open circuit or loose connection in Green wire 5Open circuit or poor connection in ground wire of the ICM6Faulty peak voltage adaptor, or peak voltage tester7 Faulty exciter coil (measure the peak voltage)8Faulty ignition pulse generator (measure the peak voltagel =Fa lty leM (when above No1are normal)9,:::c:: LPeak voltage is normal, but no spark 1Faulty spark plug or leaking ignition coil secondary jumps at plug current2Faulty ignition coilExciter coi Low peak voltage 1The mu ltimete impedance is too low; below 10 ' U