2008 Suzuki LT-A400/F, LT-F400/F ATV Service Manual, Page 192Get this manual

2008 Suzuki LT-A400/F, LT-F400/F ATV Service Manual, Page 192

1H-2 Ignition System: Condition Spark plug quickly becomes fouled with oil or carbon Possible cause Worn piston ringWorn
the ignition system couplers? Measure the battery voltage between input lead wires (OW Go to Step 3and BW) at the CDI unit
with the ignition switch in ON positionIs the voltage OK? Measure the ignition coil primary peak voltageRefer to "Ignition
Coil and Plug Cap Inspection (Page 1H-3)"NOTE This inspection method is applicable only with the multi-circuit tester and
peak voltage adaptor Go to step 4 Is the peak voltage OK? Inspect the spark plugRefer to "Spark Plug Inspection and Go to
Step 5Cleaning in Section 0B (Page 0B-6)"Is the spark plug OK? Inspect the ignition coilRefer to "Ignition Coil and Plug
Cap Go to step 6Inspection (Page 1H-3)"Is the ignition coil OK? Measure the CKP sensor peak voltage and its resistanceRefer
to "CKP Sensor Inspection (Page 1H-5)"NOTE The CKP sensor peak voltage inspection is applicable only with the multi-circuit
tester and peak voltage adaptorAre the peak voltage and resistance OK? Faulty CDI unit Faulty spark plug Faulty ignition