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Home >> Jeep >> 2009 >> Commander Overland, 4WD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Electronic Control Modules (Service Information) >> Module, Powertrain Control >> Description >> Ignition Circuit Sense

Ignition Circuit Sense

This circuit ties the ignition switch to the Powertrain Control Module (PCM). Battery voltage is supplied to the PCM through the ignition switch when the ignition is in the Run or Start position. This is referred to as the "ignition sense" circuit and is used to "wake up" the PCM.

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