Information and Entertainment Systems - Premium
Information and Entertainment Systems - Premium
Component Location
Overview
The audio system consists of a 6 speaker system with an AM/FM (Amplitude Modulation/Frequency Modulation) single CD (Compact Disc) ACM (Audio Control Module), 4.2 inch non-touchscreen FCDIM (Front Control/Display Interface Module), FCIM (Front Controls Interface Module), audio input jack, redundant steering wheel controls and optional satellite radio.
System Operation
System Diagram
Network Message Chart
Module Network Input Messages - ACM (Audio Control Module)
Module Network Input Messages - FCDIM (Front Control/Display Interface Module)
Module Network Input Messages - FCIM (Front Controls Interface Module)
Module Network Input Messages - IPC (Instrument Panel Cluster)
AM - FM Radio
The roof-mounted antenna receives AM/FM (Amplitude Modulation/Frequency Modulation) radio waves. The audio signals are sent from the roof-mounted antenna, via the AM/FM (Amplitude Modulation/Frequency Modulation) antenna cable to the ACM (Audio Control Module). The ACM (Audio Control Module) converts the radio waves to a fluctuating AC (Alternating Current) output voltage to the system speakers. The ACM (Audio Control Module) powers the AM/FM (Amplitude Modulation/Frequency Modulation) antenna to amplify the AM (Amplitude Modulation) signal.
Satellite Radio
The AM/FM (Amplitude Modulation/Frequency Modulation)/satellite antenna receives digital signals and sends them to the ACM (Audio Control Module) through the satellite radio antenna cable. The satellite radio receiver is built into the ACM (Audio Control Module).
Speed Compensated Volume
The ACM (Audio Control Module) adjusts the audio system volume based on the VSS (Vehicle Speed Sensor) signal to compensate for speed and wind noise. Other modules also receive this signal and can exhibit symptoms if the signal is lost.
Audio Input Jack Mode
When a portable MP3 (Moving Pictures Experts Group -1 Audio Layer 3) player is connected, audio from the MP3 (Moving Pictures Experts Group -1 Audio Layer 3) player can be played through the vehicle speakers. When a device is connected through the audio input jack, only the speaker volume can be controlled by the vehicle audio system. All other functions (such as seek, fast forward, pause) must be carried out on the device itself. Audio signals are sent from the audio input jack to the ACM (Audio Control Module). There are no external power or ground circuits to the audio input jack.
Steering Wheel Switch Function
The RH (Right Hand) steering wheel switch consist of an integrated 5-way upper switch and 3 momentary toggle switches. The 5-way steering wheel switch operates the FCDIM (Front Control/Display Interface Module) display. The audio redundant controls are controlled by the 3 momentary toggle switches.
Battery Load Shed
The BCM (Body Control Module) uses the battery current sensor to keep track of the battery state of charge. The battery current sensor is a hall-effect sensor attached to the battery ground cable. When the engine is off, and the BCM (Body Control Module) determines the battery state of charge is below 40% or 10% of the charge has been drained or 45 minutes have elapsed, a load shed message is sent over the CAN (Controller Area Network). This message turns off the audio/navigation system to save the remaining battery charge. Under this condition, SYS OFF TO SAVE BATT is displayed on the centerstack infotainment display to notify the driver that battery protection actions are active.
Engine off load shed occurs when the engine is not running, and the ignition is in the ACC or RUN position. To clear the load shed state, restart the engine.
MyKey(R) Audio Operation
When a MyKey(R) is in use, the audio system is muted whenever the Belt-Minder(R) is activated until the safety belts are buckled. This is a standard setting and cannot be changed.
The MyKey(R) also has an optional setting that limits the audio system volume. The maximum volume of the audio system is limited to 45%. In an attempt to exceed the limited volume, the MyKey(R) VOLUME LIMITED message is displayed in the centerstack infotainment display.
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.
Audio Input Jack
The audio input jack allows for a portable MP3 (Moving Pictures Experts Group -1 Audio Layer 3) player to be connected to the vehicle audio system utilizing a 1/8-inch audio jack.
Audio Control Module (ACM)
The ACM (Audio Control Module) can be operated with the ignition in RUN or ACC. 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.
Front Control Display Interface Module (FCDIM)
The FCDIM (Front Control/Display Interface Module) is a stand-alone module that displays infotainment system information. Information from the audio system and the climate control system are shown on the FCDIM (Front Control/Display Interface Module) display screen. The FCDIM (Front Control/Display Interface Module) requires PMI (Programmable Module Installation) when it is replaced.
Front Controls Interface Module (FCIM)
The FCIM (Front Controls Interface Module) is one of the customer interfaces to the audio system. The FCIM (Front Controls Interface Module) is also the customer interface with the HVAC (Heating, Ventilation, and Air Conditioning) module. It is separate from the ACM (Audio Control Module).
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.