Summit L4-1795cc 1.8L SOHC (1995)
Engine Control Module: Description and Operation
General Description
PURPOSE
The Engine Control Module (ECM) controls the fuel injection, ignition system and the idle speed system.
CONSTRUCTION
The ECM consists of an 8-bit microprocessor, random access memory (RAM), read only memory (ROM) and an Input/Output (I/0) interface.
The ECM is also able to perform self-diagnostic procedures and provide back-up functions if certain circuits fail.