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Home >> Pontiac >> 2005 >> Aztek Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 3.4L - Introduction >> Description and Operation >> Powertrain Control Module (PCM) Description >> PCM Service Precautions

PCM Service Precautions

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The powertrain control module (PCM), by design, can withstand the normal current draws that are associated with the vehicle operations. However, care must be used in order to avoid overloading any of these circuits. When testing for opens or shorts, do not ground or apply voltage to any of the PCM circuits unless the diagnostic procedure instructs you to do so. These circuits should only be tested with a DMM.

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