Electronic Ignition (EI) System

Electronic Ignition (EI) System Inputs And Outputs:

OPERATION
The ignition timing is controlled by the ECCS Control Module (ECM) to help maintain the best blend of engine performance and emissions under all operating conditions.
The ECM uses several sensors to calculate the amount of timing based on a map stored in its memory. The ECM varies the timing during:
^ Starting
^ Warm up
^ Idle
^ Hot engine operation
^ Acceleration
^ Low battery voltage
^ Engine ping

Power Transistor Location:

POWER TRANSISTORS
The power transistors, located on each cylinder head, are a voltage amplifier that allows the signal sent from the ECM to activate the primary circuit in the ignition coils. This induces high voltage in the secondary windings of the coils, providing spark to the plugs.