Control Unit Location & Operation
Computerized engine control system monitors and controls emission, fuel and ignition system components. Input sensors supply information to engine Electronic Control Unit (ECU). The ECU (also known as MPI control unit) processes information from input sensors and sends output signals to control devices. See INPUT DEVICES and OUTPUT SIGNALS in this article.
Electronic Control Unit (ECU) is located under center of dash, behind center console. See Fig 1 . ECU receives input voltage signals from a variety of input devices. The ECU compares each of the voltage input signals to a preset parameter which is programmed into the ECU. The ECU instantly analyzes each of the input voltage signals and adjusts output voltage signals accordingly. This allows for lower emissions while maintaining fuel economy and driveability.