Theory Of Operation
WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
The Powertrain Control Module (PCM) Receives A Constant Voltage From The Batteries Through The Battery Wires That Are Connected Directly To The Positive (+) Battery Post. The PCM Receives Ignition Switch Input When The Vehicle Is Turned On. During This Time The Customer May Experience Some Performance Effects Such As Engine Dying Or Hard Starting. Fault Information And Trip Information May Be Inaccurate.