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Home >> Jeep >> 2009 >> Commander Overland, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 88 (Electronic Control Modules (Service Information)) >> MODULE, Engine Control >> Operation >> Operation >> ECM Operating Modes >> Ignition Switch On (Engine Off)

Ignition Switch On (Engine Off)

WARNING: This page is about a different car, the 2009 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

When the ignition is turned on, the ECM activates the glow plug relay for a time period that is determined by engine coolant temperature, atmospheric temperature and battery voltage.

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