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Home >> Chrysler >> 2007 >> 300 Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Electronic Control Modules (Service Information) >> Module - Powertrain Control >> Operation >> Ignition Circuit Sense - Pcm Input

Ignition Circuit Sense - Pcm Input

The ignition circuit sense input tells the PCM the ignition switch has energized the ignition circuit.

Battery voltage is also 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.