Set Condition
WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
The Powertrain Control Module (PCM) monitors the battery system voltage and looks for a calibrated drop when the Intake Air Heater is commanded on. The fault is set if the PCM detects a voltage difference below the calibrated value when the Intake Air Heater circuit is commanded on and off during the preheat cycle at key on.