Electronic Control System

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Electronic control system monitors engine operating conditions, processes the information, and controls engine for optimum performance and minimum emissions.

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

Some engines may use a combination of MAT and MAP sensors in place of MAF sensor. The MAT and MAP sensors are used to determine airflow. The ECM may also receive signals from starter solenoid during cranking mode, air conditioning selector switch and distributor.