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Home >> Chevrolet >> 2003 >> Monte Carlo LS >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation - 3.4L >> Computerized Engine Controls >> Powertrain Control Module >> Powertrain Control Module Function

Powertrain Control Module Function

The input and output devices in the PCM include analog-to-digital converters, signal buffers, counters, and output drivers. The output drivers are electronic switches that complete a ground or voltage circuit when turned on. Most PCM controlled components are operated via output drivers. The PCM monitors these driver circuits for proper operation and, in most cases, can set a DTC corresponding to the controlled device if a problem is detected.

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