Audio System & Video System: Overview Chrysler Pacifica CS

DESCRIPTION

An audio system is standard equipment. A rear seat video system is an available option. Two radio receivers are offered. The audio/video system uses an ignition switched source of battery current so that the system will only operate when the ignition switch is in the RUN or ACCESSORY/ACCESSORY DELAY positions.

The audio/video system includes the following components

1. Amplifier
2. Antenna integral to the right quarter glass
3. CD/DVD changer (if equipped)
4. Radio noise suppression components
5. Radio receiver
6. Speakers
7. Video screen (if equipped)

Certain functions and features of the audio/video system rely upon resources shared with other electronic modules in the vehicle over the Programmable Communication Interface (PCI) bus network. The data bus network allows the sharing of sensor information. For diagnosis of these electronic modules or of the data bus network,and the use of a DRB III(R) scan tool, refer to BODY DIAGNOSTIC PROCEDURES .

For complete circuit diagrams, refer to SYSTEM WIRING DIAGRAMS .

All vehicles are equipped with Infinity speaker systems. The base system has seven speakers and a six channel amplifier with maximum power output of 200W. The Intermezzo system has the same door and instrument panel speakers as the base system plus a dual voice coil (2 channel) subwoofer and a surround sound amplifier with maximum power output of 385W. The amplifiers are powered by dual 12V feeds from a single Integrated Power Module (IPM) fuse and are energized by a combination of ignition line status and PCI bus messaging from the radio.

OPERATION

The amplifiers receive right and left channel audio inputs from the radio receiver. The base amplifier sends audio outputs to five channels, the Intermezzo outputs to seven channels. These amplifiers also receive audio inputs from the navigation unit and hands free phone module when so equipped.

The antenna module is an electromagnetic circuit component designed to capture and enhance RF (Radio Frequency) signals in both the AM and FM broadcast bands. The antenna module is mounted to the right rear roof rail under the headliner. The module is grounded through the mounting bracket and fastener. The module has a two wire electrical connector that connects to the integral radio antenna, located on the right rear quarter glass. There is also an electrical connector for battery voltage and a coax cable connector.

The antenna module receives both AM and FM radio signals supplied by the side window integral radio antenna system and selectively amplifies them. The amplified signal is then sent through the body length coax cable to the radio input.

The satellite radio antenna is secured by a bolt and two retainers which protrude through a hole in the roof panel. Two antenna cables from the antenna are connected to the satellite receiver.

The satellite radio antenna receives signals from orbiting satellites and sends these signals to the satellite receiver module. The satellite radio antenna must have open space in which to operate. Items carried on the roof, parking inside etc. can have an effect on the antenna's ability to receive signals.

Scheme 1

1. Disconnect and isolate the battery negative cable.
2. Remove the headliner.
3. Disconnect the antenna cables from the antenna.
4. Remove the retaining fastener.
5. From inside the vehicle, and using a flat bladed tool, depress one of the retaining tabs on the antenna. Push up the one side of the antenna connector through the roof panel. Depress the other side of the connector and remove the antenna. (Scheme 1)

The 6 Disc In-Dash CD/DVD Changer (if equipped) is located in the instrument panel below the radio. The remote changer does not use a cartridge or magazine for the CD/DVD's. Up to 6 CD/DVD's can be directly loaded into this unit. Three RCA jacks on the front of the unit allow the use of MP3 players, video game systems, camcorders etc.

Due to its compact design, the CD/DVD changer can carry out only one operation at a time. For example, you can not load a new disc while playing another at the same time. Each operation happens sequentially.

The radio unit provides control over all features of the CD/DVD changer with the exception of the CD/DVD load and eject functions, which are controlled by buttons located on the front of the CD/DVD changer. All features you would expect, such as Disc Up/Down, Track Up/Down, Random and Scan are controlled by the radio, which also displays all relevant CD/DVD changer information on the radio display.

The CD/DVD changer contains a Eject button, six disc buttons, an indicator LED for each of the six disc positions as well as an illuminated disc opening. The individual LED indicates whether a CD/DVD is currently loaded in that particular chamber of the CD/DVD changer. Pressing the individual button for a particular chamber, then the Eject button will eject a disc currently present in that chamber. If the chamber is currently empty, actuating the individual button will position that chamber to receive and load a new disc in that chamber, once the load light stops flashing.

Scheme 2

1. Disconnect and isolate the battery negative cable.
2. Remove instrument panel center bezel «(Refer to BODY/INSTRUMENT PANEL/INSTRUMENT PANEL CENTER BEZEL - REMOVAL)»(ref-245423-S18120095492006110200000).
3. Remove screws holding CD/DVD changer. (Scheme 2)
4. Disconnect the wire harness connector from the back of the CD/DVD changer.
5. Remove the CD/DVD changer from the vehicle.

The quarter glass integral antenna element is bonded to the right rear quarter glass and is replaced with the glass assembly only.

The integral antenna receives radio frequencies and sends them to the antenna module for amplification.

Available radio receivers include

1. AM/FM/MP3/CD with CD/DVD changer control (RAH sales code)
2. AM/FM/MP3/cassette/CD/equalizer with CD/DVD changer control feature (RBP sales code)

The radio receiver operates on ignition switched battery current that is available only when the ignition switch is in the On or Accessory/Accessory Delay positions.

Scheme 3

Scheme 4

1. Disconnect and isolate the battery negative cable.
2. Remove instrument panel center bezel «(Refer to BODY/INSTRUMENT PANEL/INSTRUMENT PANEL CENTER BEZEL - REMOVAL)»(ref-245423-S18120095492006110200000).
3. Remove radio mounting screws. (Scheme 3)
4. Pull radio rearward to gain access to the back of radio.
5. Disconnect the antenna cable by pulling the locking antenna connector away from the radio. (Scheme 4)
6. Disconnect the wire harness connectors from the back of the radio.

Radio noise suppression devices are factory-installed standard equipment on this vehicle. Radio Frequency Interference (RFI) and ElectroMagnetic Interference (EMI) can be produced by any on-board or external source of electromagnetic energy. These electromagnetic energy sources can radiate electromagnetic signals through the air, or conduct them through the vehicle electrical system.

When the audio system converts RFI or EMI to an audible acoustic wave form, it is referred to as radio noise. This undesirable radio noise is generally manifested in the form of "buzzing," "hissing," "popping," "clicking," "crackling," and/or "whirring" sounds. In most cases, RFI and EMI radio noise can be suppressed using a combination of vehicle and component grounding, filtering and shielding techniques. This vehicle is equipped with factory-installed radio noise suppression devices that were designed to minimize exposure to typical sources of RFI and EMI; thereby, minimizing radio noise complaints.

Factory-installed radio noise suppression is accomplished primarily through circuitry or devices that are integral to the factory-installed radios, audio power amplifiers and other on-board electrical components such as generators, wiper motors, blower motors, and fuel pumps that have been found to be potential sources of RFI or EMI. External radio noise suppression devices that are used on this vehicle to control RFI or EMI, and can be serviced, include the following

1. Cylinder head-to-cover ground strap - This length of braided ground strap (2) has an eyelet terminal connector crimped to each end. One end is secured to the engine cylinder head(s). The other is secured to the valve cover.
2. Resistor-type spark plugs - This type of spark plug has an internal resistor connected in series between the spark plug terminal and the center electrode to help reduce the production of electromagnetic radiation that can result in radio noise.

There are two common strategies that can be used to suppress Radio Frequency Interference (RFI) and ElectroMagnetic Interference (EMI) radio noise. The first suppression strategy involves preventing the production of RFI and EMI electromagnetic signals at their sources. The second suppression strategy involves preventing the reception of RFI and EMI electromagnetic signals by the audio system components.

The use of braided ground straps in key locations is part of the RFI and EMI prevention strategy. These ground straps ensure adequate ground paths, particularly for high current components such as many of those found in the starting, charging, ignition, engine control and transmission control systems. An insufficient ground path for any of these high current components may result in radio noise caused by induced voltages created as the high current seeks alternative ground paths through components or circuits intended for use by, or in close proximity to the audio system components or circuits.

Preventing the reception of RFI and EMI is accomplished by ensuring that the audio system components are correctly installed in the vehicle. Loose, corroded or improperly soldered wire harness connections, improperly routed wiring and inadequate audio system component grounding can all contribute to the reception of RFI and EMI. A properly grounded antenna body and radio chassis, as well as a shielded antenna coaxial cable with clean and tight connections will each help reduce the potential for reception of RFI and EMI.

Scheme 5

1. Disconnect and isolate the battery negative cable.
2. Remove the mounting fasteners. (Scheme 5)
3. Remove the ground strap.

Two rocker-type switches (if equipped) are mounted on the back (instrument panel side) of the steering wheel spokes. The switch on the left spoke is the seek switch and has seek up, seek down, and preset station advance functions. The switch on the right spoke is the volume control switch and has volume up, and volume down functions. The switch on the right spoke also includes a "mode" control that allows the driver to sequentially select AM radio, FM radio, cassette player, CD player or CD changer (if equipped).

These switches are resistor multiplexed units that are hard-wired to the Body Control Module (BCM) through the clockspring. The BCM sends the proper messages on the Programmable Communications Interface (PCI) data bus network to the radio receiver. For diagnosis of the BCM or the PCI data bus, and the use of a DRB III(R) scan tool, refer to BODY DIAGNOSTIC PROCEDURES . For more information on the operation of the remote radio switch controls, refer to the owner's manual in the vehicle glove box.

Scheme 6

Any diagnosis of the Audio system should begin with the use of the DRB III(R) diagnostic tool. For information on the use of the DRB III(R), refer to BODY DIAGNOSTIC PROCEDURES .

For complete circuit diagrams, refer to SYSTEM WIRING DIAGRAMS .

1. Disconnect and isolate the battery negative cable.
2. Remove the remote radio switch(es) from the steering wheel. «(Refer to ELECTRICAL/AUDIO/REMOTE SWITCHES - REMOVAL)»(ref-245447-S32935382952006110200000).
3. Use an ohmmeter to check the switch resistance as shown in the Remote Radio Switch Test table. (Scheme 6) REMOTE RADIO SWITCH TEST Switch Switch Position Resistance Right (White) Volume Up 1.210 Kilohms Right (White) Volume Down 3.010 Kilohms Right (White) Mode Advance 0.0511 Kilohms Left (Black) Seek Up 0.261 Kilohms Left (Black) Seek Down 0.681 Kilohms Left (Black) Pre-Set Station Advance 0.162 Kilohms
4. If the switch resistance checks OK, go to step 5. If not OK, replace the faulty switch.
5. Check for continuity between the ground circuit cavity of the switch wire harness connector and a good ground. There should be continuity. If OK, go to step 6. If not OK, repair the open circuit as required.
6. Unplug the 24-way white wire harness connector from the Body Control Module (BCM). Check for continuity between the radio control circuit cavity of the remote radio switch wire harness connector and a good ground. There should be no continuity. If OK, go to step 7. If not OK, repair the short circuit as required.
7. Check for continuity between the radio control circuit cavities of the remote radio switch wire harness connector and the BCM wire harness connector. There should be continuity. If OK, refer to «BODY DIAGNOSTIC PROCEDURES»(/chrysler/pacifica/cs-2003-2008/remont/body-cab-control-systems/#body-diagnostic-procedures) to test the BCM and the PCI data bus. If not OK, repair the open circuit as required.

Two wires connected to each speaker, one feed circuit (+) and one return circuit (-), allow the audio output signal electrical current to flow through the voice coil.

For complete circuit diagrams, refer to SYSTEM WIRING DIAGRAMS .

The video screen (if equipped) is mounted on the headliner behind the driver and front passenger seat. Pressing the release button will allow the screen to be opened.

Scheme 7

1. Disconnect and isolate the battery negative battery cable.
2. Open the video screen.
3. Remove the mounting fasteners. (Scheme 7)
4. Disconnect wire harness connector and remove video screen.

See also:
• BODY DIAGNOSTIC PROCEDURES