On models from 1996 to 1998, a conventional non-contact ignition system was installed, consisting of an ignition switch, a battery, a distributor and an ignition coil, an electronic control unit (ECM), crank angle sensor, spark plugs and wires.
Electronic control unit (ECM) controls the setting of the ignition timing based on signals from sensors that control engine operating modes, such as rotational speed, the amount of air entering the engine, coolant temperature, etc., in all operating modes. The ECM is located on the right side of the engine compartment.
This non-contact ignition system includes an inductive sensor located inside the ignition distributor, an ignition coil mounted on the intake manifold near the ignition distributor, and a switch located in the engine compartment.
On models from 1998 to 2001, the switch with ignition coils is made in the form of a single unit, mounted on a bracket on the intake manifold.
On models from 2001, the switch / ignition coil units were installed on each cylinder, directly on the spark plugs, without the use of high-voltage wires.
On models from 1998 to 2001, the non-contact ignition system consists of a camshaft position sensor, crankshaft angle sensor, ignition coils (one coil for 2 cyl.), switch and engine control unit (PCM). The ignition coil and the switch are made in the form of a single unit and are installed on the front side of the engine. Based on the signals from the camshaft position sensors and the crankshaft angle, the engine control unit identifies the cylinder, and sends a control pulse to the switch to supply a spark to the corresponding cylinder. Each ignition coil actually consists of 2 separate high voltage windings that supply a spark to two cylinders each (one to cylinders #1 and 4 and the other to cylinders #2 and 3). The ignition pulse is applied to two spark plugs at once for each engine cycle, one on the compression stroke, one on the exhaust stroke - the ignition spark on the exhaust stroke has no effect on engine operation and is therefore consumed «idle». The engine control unit (PCM) uses signals from various sensors to calculate the required ignition timing and ignition coil storage time.
On models since 2001, the non-contact ignition system consists of a camshaft position sensor, crank angle sensor, ignition coil/switch/spark plug units mounted on each cylinder, and an engine control unit (PCM). Based on the signals from the camshaft position and crankshaft angle sensors, the engine control unit identifies the cylinder and applies a control pulse to the corresponding ignition coil/switch/spark plug assembly, and calculates the required ignition timing and ignition coil energy accumulation time.