Input Components

The PCM supplies a buffered (reference) voltage to the various information sensors and switches. The PCM monitors the input components for circuit continuity and out-of-range values. The PCM also provides performance checking. Performance checking refers to the PCM indicating a fault when the signal from an input does not seem reasonable (i.e., a Throttle Position (TP) sensor that indicates a high throttle position at low engine loads or low manifold absolute pressure sensor voltage). The input components may include, but are not limited to the following sensors and switches:
^ The VSS
^ The CKP sensor
^ The TP sensor
^ The ECT sensor
^ The CMP sensor
^ The MAF sensor
^ The HO2S
^ The fuel tank pressure sensor
^ The KS
^ The Power Steering Pressure (PSP) switch, if equipped
^ The transmission range switch (A/T only)
^ The A/C compressor control module (A/C relay).

For more information on some of the PCM input components refer to Information Sensors/Switches Description.