SEQUENCE OF WORKS
1. Remove any high-tension wire tip from the spark plug and unscrew the spark plug.
2. Connect the high-voltage wire to the removed spark plug and secure it to the engine in such a way that the contact between the metal body of the spark plug and the engine is not disrupted by vibrations when the starter turns the engine crankshaft. It is best to secure the spark plug by the threaded part with a piece of thick, uninsulated wire.
3. Ask an assistant to turn the engine crankshaft with the starter.
4. If sparks are generated in the spark plug gap, this means that there is current in the secondary circuit of the ignition system and, in all likelihood, the ignition system is in good working order. However, there may be faults in the ignition system (a faulty sensor or incorrect calculation of the torque by the control unit) that cannot be determined by this method.
5. If no sparks are generated in the spark plug gap, the entire ignition system must be checked.