Engine â â Ignition coil activation test â¢â¢ Do not touch the ignition tester (spark checker) wiring during testing. â¢â¢ Make sure to cover the spark plug cap so that there are no leaks. â¢â¢ Keep flammable gas, fuel, and oil at a distance, as sparks may fly during testing. Perform an ignition system test. Apply voltage to the ignition coil of the selected cylinder to generate a spark (5 times in 5 seconds) while the spark plug lead is connected to an ignition tester (spark checker). 111 222 333 444 Display the test item selection screen. Select âActivate ignition coilâ by either clicking it or pressing the up or down arrow keys on your keyboard. Click the [OK] button or press the [Enter] key on your keyboard. Connect the spark plug cap of the cylinder that will be tested to the ignition tester (spark checker). 555 Connect the ignition tester (spark checker) to ground. 666 Set the spark gap by turning the adjusting knob. a A special service tool is needed. a North America: Spark checker (YM-34487) Worldwide: Ignition tester (90890-06754) 72