2008 Suzuki LT-A400/F, LT-F400/F ATV Service Manual, Page 194Get this manual
1H-4 Ignition System: 4) Connect the multi-circuit tester with the peak voltage adaptor as follows:! CAUTION
6) Repeat the b) procedure few times and measure the highest peak voltageIf the voltage is lower than standard range, inspect the ignition coil and the CKP sensorIgnition coil primary peak voltage 180 and more 7) After measuring the ignition coil primary peak voltage, reinstall the removed partsIgnition Coil Resistance 1) Remove the left side coverRefer to "Exterior Parts Removal and Installation in Section 9D (Page 9D3)"2) Disconnect the spark plug cap3) Disconnect the ignition coil lead wires4) Measure the ignition coil resistance in both the primary and secondary coilsIf the resistance is not within the standard range, replace the ignition coil with new oneSpecial tool0990025008 (Multi-circuit tester set) Tester knob indication Resistance)
Before using the multi-circuit tester and peak voltage adaptor, refer to the appropriate instruction manualNOTE Do not disconnect the ignition coil lead wiresSpecial tool0990025008 (Multi-circuit tester set) Tester knob indication: Voltage) ((+) Probe) (() Probe) BW lead wire WBl lead wire Ignition coil terminal or ground terminal