2006 Honda TRX680 Rincon Factory Service Manual, Page 560Get this manual
TROUBLESHOOTING
ENGINE DOES NOT START OR IS HARD TO START
1Spark Plug Inspection Remove and inspect spark plugIs the spark plug in good condition? NOIncorrect spark plug heat range Incorrect spark plug gap Dirty air cleaner YESGO TO STEP 22Spark Test Perform spark testIs there weak or no spark? YESLoose or disconnected ignition system wire Faulty ignition coil Broken or shorted spark plug wire Loose or disconnected ignition system wires Faulty CKP sensor Faulty engine stop switch Faulty ignition switch Faulty PCM NOGO TO STEP 33Fuel Pump Inspection Check for operation of the fuel pump and inspect the fuel flowIs the fuel pump unit normal? NO YESFaulty fuel pump unitTO STEP 4