Component Description

Information and Entertainment Systems - Premium Plus

Component Description

Antenna

The roof-mounted antenna has an integrated antenna module that is powered by the ACM (Audio Control Module) to improve AM/FM (Amplitude Modulation/Frequency Modulation) reception. If the vehicle is equipped with satellite radio, the satellite antenna is integrated into the roof-mounted antenna.

Media Hub

The media hub allows for various audio and video devices to be played through the vehicle speakers and viewed in the FDIM (Front Display Interface Module) display.
The media hub receives inputs from:
- 2 USB (Universal Serial Bus) ports
- 1 SD (Secure Digital) card slot
- 1 set of component RCA jacks

Microphone

The microphone receives the voice command and sends a signal to the APIM (Accessory Protocol Interface Module). The microphone is also used to detect outgoing audio during a phone call and voice commands for the SYNC(R) system.

Steering Wheel Switches

The RH (Right Hand) steering wheel switch consists of a series of resistors. Each steering wheel control switch function corresponds with a specific resistance value within the switch. The SCCM (Steering Column Control Module) sends out a 5 volt reference voltage to the RH (Right Hand) steering wheel switch on the input circuits and monitors the voltage drop when a button is pressed. The voltage drop varies depending upon the resistance of the specific button pressed, providing indication to the SCCM (Steering Column Control Module) which switch is pressed.

Audio Control Module (ACM)

The ACM (Audio Control Module) can be operated with the ignition in RUN or ACCESSORY. The accessory delay feature allows the audio system to be operated for a preset period of time after the ignition is turned off and a front door has not been opened. The ACM (Audio Control Module) requires PMI (Programmable Module Installation) when it is replaced.

Accessory Protocol Interface Module (APIM)

The APIM (Accessory Protocol Interface Module) consists of 2 internal modules: the CIP (Consumer Interface Processor) and the VIP (Vehicle Interface Processor). The modules are not replaceable individually, but can be flashed independently, if required.
The CIP (Consumer Interface Processor) interfaces with all of the inputs to the APIM (Accessory Protocol Interface Module). It contains an analog-to-digital-to analog converter, as well as the Bluetooth chipset. Any application upgrades that are available to the consumer are loaded directly to the CIP (Consumer Interface Processor) through the USB (Universal Serial Bus) port.
The VIP (Vehicle Interface Processor) provides an interface between the CIP (Consumer Interface Processor) and the vehicle. Its main functions are controlling the APIM (Accessory Protocol Interface Module) power management and translating both inbound and outbound signals. In addition, the VIP (Vehicle Interface Processor) queries the modules on the network to retrieve any DTCs (Diagnostic Trouble Codes) when a vehicle health report is requested.

Front Controls Interface Module (FCIM)

The FCIM (Front Controls Interface Module) is one of the customer interfaces to the audio system and the HVAC (Heating, Ventilation, and Air Conditioning) module. It is separate from the ACM (Audio Control Module).

Front Display Interface Module (FDIM)

The FDIM (Front Display Interface Module) provides for customer interaction through the touchscreen display. The FDIM (Front Display Interface Module) plugs directly into the APIM (Accessory Protocol Interface Module), and therefore does not communicate directly on any network and no external circuits are connected.

Global Positioning System Module (GPSM)

The GPSM (Global Positioning System Module) provides vehicle location for real-time traffic reports and re-routing, and for identifying vehicle location in the event of a collision.
For vehicles with navigation, the GPSM (Global Positioning System Module) acts as the antenna for the navigation system.
The vehicle location information is broadcast to the APIM (Accessory Protocol Interface Module).

Audio Amplifier

The audio amplifier receives audio signals from the ACM (Audio Control Module). The audio amplifier increases and strengthens the input audio signals from the ACM (Audio Control Module) and outputs the signals to the front door speakers. The ACM (Audio Control Module) and the audio amplifier provide internal protection for shorts to ground and shorts to voltage. The audio amplifier does not communicate directly on any network.
The ACM (Audio Control Module) sends voltage through the enable/clip circuit to enable the audio amplifier. The circuit acts as both an output (to enable the amplifier) and an input (to detect an amplifier overload condition). The voltage sent by the ACM (Audio Control Module) passes through a variable resistor in the audio amplifier, then to ground. As the amplifier reaches maximum output, the resistance in the variable resistor decreases. This decreases the voltage drop, resulting in the ACM (Audio Control Module) detecting a higher voltage on the enable/clip circuit. When the voltage reaches the clip threshold, the ACM (Audio Control Module) clips the audio output signal to the amplifier (heard as distortion), to prevent damage to the amplifier and speakers.
The enable/clip status is based on voltages, as detected by the ACM (Audio Control Module):
- Less than 0.4 volt: amplifier disabled
- Between 3.8 and 6.7 volts: amplifier enabled
- Greater than 8.5 volts: amplifier clipped