Theory Of Operation
WARNING: This page is about a different car, the 2019 RAM 3500 HD and 2019 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
The Powertrain Control Module (PCM) actuates the solenoid in the Fuel Injector causing the needle valve to rise and fuel flows through the spray holes in the nozzle tip into the combustion chamber. The PCM has a common internal driver circuit to all three Fuel Injectors on each bank. If any injector circuit on a given bank has a short to ground or a short to voltage, a DTC will be set for all three Fuel Injectors on that bank. Fuel Injectors 1, 2, 3 are grouped together on bank 1. Fuel Injectors 4, 5, 6 are grouped together on bank 2. During this time the customer may experience engine surge or stumble.