Toyota
Dodge Durango
 Service Manual
Audio Systems » Description and operation
Audio system

DESCRIPTION

An audio system is standard factory-installed equipment on this model, unless the vehicle is ordered with an available radio delete option. The standard equipment audio system includes an AM/FM/cassette (RAS sales code) receiver, and speakers in four locations. Several combinations of radio receivers and speaker systems are offered as optional equipment on this model. The audio system uses an ignition switched source of battery current so that the system will only operate when the ignition switch is in the On or Accessory positions. The audio system includes the following components:

  • Antenna
  • Clockspring (with remote radio switches only)
  • High-line Central Timer Module (CTM) (with remote radio switches)
  • Power amplifier (with premium speaker system only)
  • Radio noise suppression components
  • Radio receiver
  • Remote radio switches (optional with RAZ radio receiver only)
  • Speakers

Refer to Clockspring in the Description and Operation section of Group 8M - Passive Restraint Systems for more information on this component. Refer to Central Timer Module in the Description and Operation section of Group 8E - Instrument Panel Systems for more information on this component.

Refer to Audio System in the Contents of Group 8W - Wiring Diagrams for complete circuit diagrams. Following are general descriptions of the remaining major components in the standard and optional factory- installed audio systems.

OPERATION

See the owner's manual in the vehicle glove box for more information on the features, use and operation of each of the available audio systems.

CENTRAL TIMER MODULE

The high-line Central Timer Module (CTM) can also control some features of the audio system when the vehicle is equipped with the optional RAZ radio receiver and remote radio switches. A high-line CTM is used on high-line versions of this vehicle. The CTM combines the functions of a chime/buzzer module, an intermittent wipe module, an illuminated entry module, a remote keyless entry module, and a vehicle theft security system module in a single unit.

The high-line CTM also controls and integrates many of the additional electronic functions and features included on models with this option. The RAZ radio receiver with a remote radio switch option is one of the features that the CTM controls. The CTM is programmed to send switch status messages over the Chrysler Collision Detection (CCD) data bus to control the volume, seek, and pre-set station advance functions of the RAZ radio receiver. The CTM monitors the status of the remote radio switches located on the steering wheel through a hard wired circuit.

The CTM then sends the proper switch status messages to the radio receiver. The electronic circuitry within the radio receiver responds to the switch status messages it receives by adjusting the radio settings as requested.

Refer to Central Timer Module in the Description and Operation section of Group 8E - Instrument Panel Systems for more information on the high-line CTM. Refer to Remote Radio Switch in the Description and Operation section of this group for more information on this component. In addition, radio receivers connected to the CCD data bus have several audio system functions that can be diagnosed using a DRB scan tool. Refer to the proper Diagnostic Procedures manual for more information on DRB testing of the audio systems.

    More about «Description and operation»:

    Audio system

    Radio receiver

    Remote radio switch

    Speaker system

    Power amplifier

    Antenna

    Radio noise suppression

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