Engine Control Module: Description and Operation: Overview

Fig. 1 Electronic control unit:

The control unit, Fig. 1, is connected to the electronic fuel injection harness by a multi-connector and the electronic fuel injection harness is connected to the other sensors.

The purpose of the control unit is to generate a pulse signal. Upon receiving an electrical signal from each sensor, the control unit generates a pulse signal and the duration, injector open-valve time period, is controlled to provide an optimum quantity of fuel according to the engine demands.