Input Components

The control module monitors the input components for circuit continuity and out-of-range values. This includes performance checking. Performance checking refers to indicating a fault when the signal from a sensor does not seem reasonable, for example, a Throttle Position (TP) sensor that indicates high throttle position at low engine loads or manifold absolute pressure (MAP) sensor voltage. The input components may include but are not limited to the following sensors:
^ The Vehicle Speed Sensor (VSS)
^ The Crankshaft Position (CKP) sensor
^ The Knock Sensor (KS)
^ The Throttle Position (TP) sensor
^ The Engine Coolant Temperature (ECT) sensor
^ The Camshaft Position (CMP) sensor
^ The Manifold Absolute Pressure (MAP) sensor
^ The Mass Air Flow (MAF) sensor

In addition to the circuit continuity and rationality tests, the ECT sensor is monitored for the ability to achieve a steady state temperature in order to enable a closed loop fuel control.