into the back part of the enclosure while, the front of the speaker cone works into a ducted port that effectively extends the low range of the
speaker and also increases the efficiency of the system. When completely assembled, the subwoofer is not visible from the outside of the housing.
All of the bass from the woofer exits through the ducted port located at approximately the passengers left shoulder area. Bass is characteristically
non-directional so the physical location of the port is not critical for good bass reproduction. The housing assembly with speakers weighs
approximately 14 pounds.
The amplifier, located under the passenger seat, is an 8 x 40 system. That is, 8 channels at 40 watts each for a total of 320 watts. It is built by
Infinity/Harman audio system. It is turned ON with an ON/OFF signal from the radio and is responsible for driving all speakers and handling the
cross over internally. Internal electronic crossovers allow more efficient splitting of the frequencies without losses associated with passive
crossover systems. The amplifier also has short circuit protection in case of a speaker failure.
There are remote control switches on the back of the steering wheel for volume up/down, seek up, seek down, and preset station selections. For
this reason, the radio will be connected to the CCD bus and will allow some diagnostics of the system with the DRBIII.
The antenna is sandwiched between two layers of the windshield. To provide better range, it uses an amplifier that is located under the I/P top
cover on the passenger side. The antenna amplifier is turned ON with the ON/OFF signal from the radio.
BODY CONTROL MODULE
The Body Control Module (BCM) supplies vehicle occupants with visual and audible information and controls various vehicle functions. To
provide and receive information, the module is interfaced to the vehicle's serial bus communications network (the Chrysler Collision Detection
bus, or CCD bus). This network consists of the powertrain control module (PCM), the transmission control module (TCM), the electro/mechanical
instrument cluster (MIC), the radio (RBN) and the airbag control module (ACM). The BCM is operational when battery power is supplied to the
module. Ignition switch power is needed for ignition switch functions.
The Body Control Module provides the following features:
Inside Mirror/Reading Lamps
Ignition key Halo Lamp
Battery Protection (load shedding)
Intermittent Wipe, Speed Sensitive Wipe and Wipe after wash
Instrument Cluster Support
Gauge positioning and CCD Lamp Drive
Instrument Cluster Dimming
Vehicle Theft Security System (VTSS)
Auto Door Locks
Remote Keyless Entry (RKE)
Door Lock Inhibit
Exterior Lamp Control
Controls Parklamps, Low & High Beam Headlamps
Headlamp Time Delay
Remote Radio Controls
Climate Control Support
Low Tire Pressure Warning interface for operation of LTPW Lamp
Body Control Module Systems Supported
The BCM receives information over the CCD Bus from the PCM in order to support certain features. The required information is a follows:
Injector on Time and Distance Pulses
Engine and Battery Temperature
Charging System Failure, Engine Temperature Limp-In, VTSS Arming Status
"Service Engine Soon" Lamp Status
The BCM provides the PCM with information on the A/C switch status and the "OK to Start" or VTSS status.
The Chime System is an integral part of the Body Control Module (BCM) and provides the driver with two types of chimes, Warning and
Announcement. The BCM monitors its hardwired inputs and CCD bus messages to determine when a chime is needed. The Warning Chimes are a
dual tone chime for the following conditions: Seat Belt Unbuckled, Exterior Lamps On, Key-In Ignition, Critical tire pressure, and Dome Lamps
ON. The Announcement Chime is a single tone chime to warn the driver when an instrument cluster gauge is out of range or a warning lamp is