Linhai ATV 500-D T3 EFI, Service Manual

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CHAPTER 7 ELECTRICAL
LH500ATV-D T3 EFI SERVICE MANUAL 19.0
CHAPTER 7 ELECTRICAL PAGE.7- 5
7.3 IGNITION SYSTEM
IGNITION SYSTEM TROUBLESHOOTING
No Spark, Weak or Intermittent Spark
 Spark plug gap incorrect
 Fouled spark plug
 Faulty spark plug cap or poor connection to high tension lead
 Related wiring loose, disconnected, shorted, or corroded
 Engine stop switch or ignition switch faulty

Terminal board or connections wet, corroded
 Poor ignition coil ground (e.g. coil mount loose or corroded)
 Faulty stator (measure resistance of all ignition related windings)
 Incorrect wiring (inspect color coding in connectors etc. )
 Faulty ignition coil winding (measure resistance of primary and secondary)
 Worn magneto (RH) end crankshaft bearings
 Sheared flywheel key
 Flywheel loose or damaged
 Trigger coil air gap too wide (where applicable) should be 0.030-0 .050" (0. 75-1.25 mm)
 Excessive crankshaft run out on magneto (RH) end should not exceed 0.005"
(0.13mm)
 Faulty ECU module
CIRCUIT DIAGRAM