Electronic Control System

The electronic control system monitors engine operating conditions. The electronic control system then processes these conditions, and controls the engine for optimum performance and minimum emissions.

Input signals are generated by the Engine Coolant Temperature (ECT) sensor, Mass Airflow (MAF) sensor, Oxygen (O2) sensor, Throttle Position Sensor (TPS), Park/Neutral switch, Vehicle Speed Sensor (VSS), Manifold Air Temperature (MAT) sensor and Manifold Absolute Pressure (MAP) sensor.

Some 2.8L engines may use a combination of the MAF, MAT and MAP sensors. On 2.0L Turbo engines the MAP and MAT sensors are used to determine airflow. The ECM also receives signals from the starter solenoid, air conditioning selector switch and distributor.