Input Components

The PCM 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, such as a Throttle Position (TP) sensor that indicates high throttle position at low engine loads or MAP voltage. The input components may include, but are not limited to, the following sensors:
^ The Vehicle Speed (VSS) Sensor
^ The Mass Air Flow (MAF) Sensor
^ The Intake Air Temperature (IAT) Sensor
^ 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

In addition to the circuit continuity and rationality check, the ECT sensor is monitored for its ability to achieve a steady state temperature to enable Closed Loop fuel control.