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 Sensor (VSS)
^ Mass Air Flow (MAF) Sensor
^ Intake Air Temperature (IAT) Sensor
^ Crankshaft Position (CKP) Sensor
^ Knock Sensor (KS)
^ Throttle Position (TP) Sensor
^ Engine Coolant Temperature (ECT) Sensor
^ Camshaft Position (CMP) Sensor
^ 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.