Warning: High voltage!
1. Turn the ignition key to the second position (the "battery" light should be on and/or "oil pressure"). This way you have turned on the power supply of the electronic module.
2. Check for visible damage (poor contact, corrosion, breaks, etc.) ignition system wires.
3. Check the secondary voltage value (about 25000 volts). A poor spark plug connection can cause misfires. Inspect the spark plug. Pay special attention to coke deposits: they can cause a short circuit without spark formation.
4. Check the coil for traces of coke deposits. If there are coke deposits, replace the coil.
5. Measure the resistance on the contacts. If the ohmmeter shows infinity, replace the coil.
6. Measure the resistance of the high-voltage wires. It should be less than 30,000 Ohms.
(The original is located on the website «hondabook.ru»)