Operation
INTRODUCTIONOperating instructions for the factory installed audio systems can be found in the Owner's Manual provided with the vehicle.
NS vehicles are equipped with an Ignition Off Draw (IOD) fuse in the power distribution center located in the engine compartment. After the IOD fuse or battery has been disconnected, the radio station sets and clock will require resetting.
SYSTEM OPERATION
Antenna
All models use a fixed-length stainless steel rod-type antenna mast, installed at the right front fender of the vehicle. The antenna mast is connected to the center wire of the coaxial antenna cable, and is not grounded to any part of the vehicle.
To eliminate static, the antenna base must have a good ground. The coaxial antenna cable shield (the outer wire mesh of the cable) is grounded to the antenna base and the radio chassis.
The antenna coaxial cable has an additional disconnect, located near the right end of the instrument panel. This additional disconnect allows the instrument panel assembly to be removed and installed without removing the radio.
The factory-installed Electronically Tuned Radios (ETRs) automatically compensate for radio antenna trim. Therefore, no antenna trimmer adjustment is required or possible when replacing the receiver or the antenna.
Interference Elimination
Some components used on the vehicles are equipped with a capacitor to suppress radio frequency interference/static.
Capacitors are mounted in various locations internal to the generators instrument cluster and windshield wiper motor.
To eliminate radio interference, ground straps are used in different areas of the vehicle. These ground circuits should be securely tightened to assure good metal to metal contact. The ground straps conduct very small high frequency electrical signals to ground and require clean surface contact area. The radio ground is supplied from the instrument panel harness and is attached to the rear of the radio. Some engines have other ground straps to eliminate further radio interference:
- Radio chassis to instrument panel structure
- Engine to dash panel
- Engine to chassis
- A/C h valve to dash panel
Radio resistance type spark plug cables in the high tension circuit of the ignition system complete the interference suppression. Faulty or deteriorated spark plug wires should be replaced.
Radios
Available factory-installed radio receivers for this model include an AM/FM/cassette (RAS sales code), an AM/FM/cassette/5-band graphic equalizer with CD changer control feature (RBN sales code), an AM/FM/CD/3-band graphic equalizer (RBR sales code), or an AM/FM/CD/cassette/3-band graphic equalizer (RAZ sales code).
All factory-installed radio receivers are stereo Electronically Tuned Radios (ETR) and include an electronic digital clock function.
All factory-installed radio receivers, except the RAS model, communicate on the Chrysler Collision Detection (CCD) data bus network through a separate two-way wire harness connector. The CCD data bus network allows the sharing of sensor information. This helps to reduce wire harness complexity, internal controller hardware, and component sensor current loads. At the same time, this system provides increased reliability, enhanced diagnostics, and allows the addition of many new feature capabilities.
In addition, radios connected to the CCD data bus have several audio system functions that can be diagnosed using a DRE scan tool. Refer to the Powertrain Management/Computer and Control Systems/proper Diagnostic Procedures for more information on DRB testing of the audio systems.
The radio can only be serviced by an authorized radio repair station. Refer to the latest Warranty Policies and Procedures for a current listing of authorized radio repair stations.
For more information on radio features, setting procedures, and control functions refer to the owner's manual in the vehicle glove box.
Choke Location:
Choke-Infinity Speakers
If the audio system is lacking bass response, check for continuity across the choke connector. If no continuity Replace choke. The choke is located on the bracket behind the junction block/body control module.
Remote Radio Switches
Remote Radio Switch Operational View:
A remote radio control switch option is available on LXI models sold in North America with the AM/FM/ cassette/S-band graphic equalizer with CD changer control feature (RBN sales code), or the AM/FM/CD/ cassette/3-band graphic equalizer (RAZ sales code) radio receivers. Two rocker-type switches 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.
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 Chrysler Collision Detection (CCD) data bus network to the radio receiver. For diagnosis of the BCM or the CCD data bus, the use of a DRB scan tool and the proper Diagnostic Procedures manual are recommended. For more information on the operation of the remote radio switch controls, refer to the owner's manual in the vehicle glove box.
Name Brand Speaker Relay
Relay is located in the junction block. To test relay refer to the Audio Diagnostic Test Procedures or use a known good relay.