Electronic Ignition (EI) System

Electronic Ignition Input/Output Line:

Ignition Timing Data Map:

OPERATION
The ignition timing is controlled by the ECCS Control Module (ECM) in order to maintain the best air-fuel ratio for every running condition of the engine. The ignition timing data is stored in the ECCS Control Module.
The ECCS Control Module detects information such as the injection pulse width and camshaft position sensor signal which varies every moment. Then responding to this information, ignition signals are transmitted to the power transistor.
In addition to this, at starting, during warm-up, at idle and at low battery voltage, the ignition timing is revised by the ECM according to the other data stored in the ECM.

IGNITION RETARD SYSTEM
The retard system, actuated by the knock sensor, is designed only for emergencies. The basic ignition timing is pre-programmed within the anti-knocking zone, if recommended fuel is used under dry conditions. Consequently, the retard system does not operate under normal driving conditions. However, if engine knocking occurs, the knock sensor monitors the condition and the signal is transmitted to the ECM. After receiving it, the ECM retards the ignition timing to eliminate the knocking condition.