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 MAP 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

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