1. Check winding resistance and insulation resistance.
2. The resistance of the primary winding at 200°C should be 3.07–3.5 ohms, and the resistance of the secondary winding 5500–9200 ohms. The insulation resistance to ground must be at least 50 ohms.
3. For ignition coil 27.3705, used in a non-contact ignition system, the resistance of the primary winding at 250°C should be (0,45±0,05) Ohm, and the secondary winding (5±0,5) kOhm
4. Dry coil 3122.3705 with a closed magnetic circuit, also used in a non-contact ignition system.