Relay, Intake Air Heater: 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) operates the heating element through the intake manifold air heater relay. Refer to the appropriate Diagnostic Procedures for an electrical operation and complete description of the intake heater, including pre-heat and post-heat cycles.