Ignition System: Description and Operation

System Description

The ignition system used for this vehicle has an electronic ignition control system and consists of the following parts.

^ ECM
It detects the engine condition through the signals from the sensors, determines the most suitable ignition timing and time for electricity to flow to the primary coil and sends a signal to the power unit.

^ Power Unit (Igniter)
It turns ON and OFF the primary current of the ignition coil according to the signal from the ECM.

^ Ignition Coil
When the ignition coil primary current is turned OFF, a high voltage is induced in the secondary winding.

^ Distributor
It distributes a high voltage current to each plug.

^ High-tension cords and spark plugs.

^ CMP Sensor (Camshaft Position Sensor)
Located in the distributor, it converts the crank angle into voltage variation and sends it to the ECM. For details refer to Computers and Controls.

^ TP Sensor, ECT Sensor and MAP Sensor
For details refer to Computers and Controls.