Ignition Control Module: Description and Operation

PURPOSE

The igniter physically fires the ignition coil in response to the Electronic Control Unit (ECU)'s signal. Computers generally produce low amperage signals as outputs, the igniter is essentially an electronic relay. It receives a "trigger" from the ECU and responds by turning a higher amperage current to the ignition coil on and off.

OPERATION

Computers generally produce low amperage signals as outputs, the igniter is essentially an electronic relay. It receives a "trigger" from the ECU and responds by turning a higher amperage current to the ignition coil on and off.

CONSTRUCTION

The igniter consists of a power transistor and circuitry to provide a tachometer output.