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 Radio is provided with a fused Battery and Ground circuit. When the Ignition is turned on, the Security Gateway Module (SGW) transmits a wake up signal over the CAN bus to the Radio. The Radio monitors the Speaker, Antenna and Microphone circuits for electrical failures.

The Radio manages the hands-free, navigation, and satellite functions of the vehicle. The Radio becomes operational after receiving a wake up signal over the CAN-IHS data bus indicating the status of the ignition switch is On. Depending upon audio system options, the Radio can play audio from many different media sources, such as the 3.5 millimeter auxiliary (AUX) port, a universal serial bus (USB) port or through wireless Bluetooth™ audio streaming. The Radio is capable of using AM/FM, Cellular, Global Positioning System (GPS) and Satellite Radio signals depending upon the audio system/vehicle configuration.

Make sure any serviced speakers are similar to the one being removed. The Radio uses the vehicle build configuration data (based upon sales code) to determine the audio configuration.

For additional information regarding the description and operation of the Audio System. Refer to DESCRIPTION and RADIO, DESCRIPTION .