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Home >> Saturn >> 2007 >> Ion Red Line >> Repair and Diagnosis >> External Pages >> Different car >> Section 20 (Engine Controls (Introduction)) >> Description and Operation >> Electronic Ignition (EI) System Description >> Powertrain Control Module (PCM)

Powertrain Control Module (PCM)

WARNING: This page is about a different car, the 2004 Saturn Ion Red Line. However, it is still accessible from the selected car via links, so may be relevant.

The PCM controls all ignition system functions, and constantly corrects the spark timing. The PCM monitors information from various sensor inputs that include the following:

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