Stratus Sedan V6-2.7L (2001)
The following indicators are hardwired and not controlled by PCI bus messages:
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Seat Belt Indicator
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Oil Pressure Indicator
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Brake Warning Indicator
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VTSS Indicator
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Turn Signal Indicators
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Fog Lamp Indicators
POWER DOOR LOCK SYSTEM
The door lock switches provide a variable amount of voltage through the Multiplexed (MUX) circuit to the BCM. Depending upon that input and
various conditions that must be met (i.e. door lock inhibit, etc.), the BCM will determine the action to be taken and activate the proper relay for
approximately 250 to 350 msec. If the vehicle is equipped with the vehicle theft security system it will have the central locking feature which locks
and unlocks all doors from the cylinder lock switches. These switches are on separate multiplexed circuits to the BCM and have trouble codes
relating to each of them.
RKE Remote Keyless Entry - This feature allows locking and unlocking of the vehicle door(s) by remote control using a hand-held transmitter
(sometimes referred to as a fob) to activate a radio receiver (RKE module). This module now plugs into the body control module which is directly
connected to the junction block. With this feature RKE can now be added to a non-equipped vehicle by installing a module. If the vehicle is
equipped with the vehicle theft security system, RKE will also arm and disarm that system. A 4-button transmitter is used which provides lock,
unlock, decklid release and panic features. Decklid release is only operable while the vehicle is in the park position. The module is capable of
retaining up to 4 transmitter codes. Rolling code, which increases security, is also included in this system. If the transmitter goes out of
synchronization it is easily put back in by pressing the lock button when the transmitter is within range. An external antenna has been added which
plugs into the module to provide greater range. RKE will also turn ON the interior lamps when a valid unlock command is received and will
extinguish the interior lamps when a lock command is received and all doors are closed.
Door Lock Inhibit - When the key is in the ignition and the driver front door is open, all door lock switches are disabled. The unlock switches are
still functional. This protects against locking the vehicle with the keys still in the ignition.
Automatic (rolling) Door Locks - This feature can be enabled or disabled by using either the DRB III or the customer programmable method.
When enabled, all doors will lock when the vehicle reaches a speed of 15 mph (24 km/h) and all doors are closed. If a door is opened and the
vehicle slows to below 15 mph (24 km/h), the locks will operate again once all doors are closed and the speed is above 15 mph (24 km/h).
Decklid Release - Decklid release is now a function of the body control module. Trouble codes are provided to assist in the diagnosis of this
system.
Customer programmable features are: Horn chirp, one or two press decklid release, programming a new transmitter (using a previously
programmed transmitter), rolling door locks, unlock on exit, and RKE lamp flash.
POWER CONVERTIBLE TOP
Top Control
The body control module now controls all the functions of the convertible top. The body control module supplies a multiplexed voltage of
approximately 90% of ignition voltage to the power top switch. Through a series of resistors the power top switch switches the circuit to ground
depending on the position of the switch. The BCM then supplies the ground path for the up or down relay as requested. The power top switch has
a 4.7-ohm diagnostic resistor that allows the BCM to detect a possible open circuit.
Window Drop Relay Assembly
The convertible has a new feature that allows the operator to lower all four windows and lower the top at the same time. This is accomplished by
pressing the power top switch to the second detent. Through the multiplexed circuit of the power top switch the BCM will supply the ground for
the window drop relay assembly.
The window drop relay assembly is comprised of four separate relays that are in series with the power window circuits. The relay assembly is
located in the driver door.
VEHICLE COMMUNICATION
The Programmable Communication Interface multiplex system (PCI bus) consists of a single wire. The Body Control Module (BCM) acts as a
splice to connect each module and the Data Link Connector (DLC) together. Each module is wired in parallel to the data bus through its PCI chip
set and uses its local ground as the bus reference, The wiring is a minimum 20 gage.
The bus is designed to handle a maximum number of nodes to meet all of the bus load and timing requirements. The bus resistance and
capacitance is designed to provide a maximum level of filtering without distorting the bus symbols. This is why extra capacitance and resistance
should not be added to the PCI Data Bus circuitry.
In order for an electronic control module to communicate on the PCI data bus, the module must have bus interface electronics consisting of a
transmitter/receiver (or transceiver) and Logic control, but termination for loading and filtering the bus, and wiring which interconnects the system.
