The ignition system uses a spark distribution method called the spark distribution method "idle spark". The engine cylinders are combined in pairs 1-4 and 2-3 and sparking occurs simultaneously in two cylinders: in the cylinder in which the compression stroke ends (working spark) and in the cylinder in which the exhaust stroke occurs (idle spark). Due to the constant direction of current in the windings of the ignition coils, the sparking current in one spark plug always flows from the central electrode to the side electrode, and in the second - from the side to the central one. Candles are used type A17DVRM or AC.R43XLS with a gap between the electrodes of 1.0–1.13 mm.
The ignition module receives a signal from the crankshaft position sensor, processes it and sends a reference signal to the computer with a frequency of one pulse per 180°crankshaft rotation. The ignition module also sends a signal to operate the tachometer in the instrument cluster. At engine speeds up to 500 rpm, ignition is controlled by the ignition module by activating each coil at a predetermined interval based only on the engine speed data.
At speeds above 500 rpm, the ECU controls the ignition using the following information:
- crankshaft speed;
- engine load (absolute air pressure);
- atmospheric (barometric) air pressure;
- coolant temperature;
- intake air temperature;
- crankshaft position.