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Home >> Ford >> 1988 >> Bronco II 4WD, Standard, M5OD-R1 >> Repair and Diagnosis >> Engine Performance >> Theory and Operation >> EEC IV Theory/Operation >> Description >> Basic System Operation

Basic System Operation

The engine control system consists of the ECA, sensors, switches, and actuators. In order for the ECA to perform properly, it must be kept constantly informed of engine operating conditions.

It is the task of the engine sensors to supply the ECA, via electrical signals, with specific information required to determine engine operating conditions. The ECA will then send out electrical signals to control air/fuel ratio, emission controls, idle speed and ignition timing. Individual component operation is as follows:

NOTE: All of the following sensors are not used on every system. Refer to the appropriate wiring diagram in this section to identify the sensors used on a particular system
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