Introduction

SYSTEM OPERATION
Audio System
A Body Control Module (BCM) is used on this model to control and integrate many of the electronic functions and features included on the vehicle. The BCM contains a central processing unit and interfaces with other modules in the vehicle on the Chrysler Collision Detection (CCD) data bus network.

The CCD data bus network allows the sharing of sensor information. This helps to reduce wire harness complexity, reduce internal controller hardware, and reduce component sensor current loads. At the same time, this system provides increased reliability, enhanced diagnostics, and allows the addition of many new feature capabilities.

One of the functions and features that the BCM supports and controls, is the remote radio switches on vehicles so equipped. The BCM receives hard-wired resistor multiplexed inputs from the remote radio switches. The programming in the BCM allows it to process those inputs and send the proper messages to the radio over the CCD data bus to control the radio volume, station seek, and preset station advance functions.

The BCM is mounted under the driver side outboard end of the instrument panel, behind the instrument panel support armature and below the outboard switch pod. Refer to Instrument Panel, Gauges and Warning Indicators/Instrument Panel Systems for the removal and installation procedures. For diagnosis of the BCM or the CCD data bus, the use of a DRB scan tool and the proper Diagnostic Procedures are recommended. The BCM can only be serviced by an authorized electronic repair station. Refer to the latest Warranty Policies and for a current listing of authorized electronic repair stations.

The horn system is one of the outputs of the BCM. The BCM is programmed to energize or de-energize the horn relay in response to certain inputs from the Vehicle Theft Security System (VTSS) and the Remote Keyless Entry (RKE) system.

Windshield Wiper System
Some of the functions and features that the BCM supports and controls are the speed sensitive intermittent wipe, pulse wipe, and wipe-after-wash modes. On models with the optional automatic headlamps, the BCM can be programmed to automatically turn on the headlamps when the windshield wipers are turned on.

The BCM is programmed to energize or de-energize the intermittent wipe relay in response to certain inputs from the multi-function switch and the windshield wiper motor park switch. For the speed sensitive intermittent wipe feature, the BCM also uses an input from the vehicle speed sensor, which is received on the CCD data bus from the Powertrain Control Module (PCM).

Electrically Heated Systems
One of the systems that the BCM supports and controls, is the rear window defogger system. In its role as the defogger system timer and controller, the BCM receives hard-wired inputs from the defogger switch and the ignition switch. The programming in the BCM allows it to process the information from these inputs and send a control output to energize or de-energize the defogger relay The BCM also sends a defogger switch status message to the Driver Door Module (DDM) and Passenger Door Module (PDM) on the CCD data bus. The DDM and PDM respond by controlling the current feeds to their respective outside rear view mirror heating elements.

The BCM is mounted under the driver side outboard end of the instrument panel, behind the instrument panel support armature and below the outboard switch pod. Refer to Instrument Panel, Gauges and Warning Indicators/Instrument Panel Systems for the removal and installation procedures. For diagnosis of the BCM or the CCD data bus, the use of a DRB scan tool and the proper Diagnostic Procedures are recommended. The BCM can only be serviced by an authorized electronic repair station. Refer to the latest Warranty Policies and Procedures for a current listing of authorized electronic repair stations.

Power Lock System
In the power lock and Remote Keyless Entry (RKE) systems, the locks are actuated by a reversible electric motor mounted within each door and the lift-gate. The driver front door lock motor direction is controlled by the battery and ground feeds from the Driver Door Module (DDM). The remaining door lock motors and the liftgate lock motor are controlled by the battery and ground feeds from the Passenger Door Module (PDM).

The power lock motors cannot be repaired and, if faulty or damaged, the entire motor must be replaced.

Vehicle Theft/Security System
One of the functions and features that the BCM supports and controls, is the Vehicle Theft Security System (VTSS). In the VTSS, the BCM receives CCD message inputs from the Passenger Door Module (PDM), which contains the Remote Keyless Entry (RKE) receiver. In addition to the information received on the CCD data bus, the BCM receives hard-wired inputs from the door ajar, door lock cylinder, ignition, liftgate ajar, liftgate lock cylinder, and liftglass ajar switches. The programming in the BCM allows it to process the information from all of its inputs and send control outputs to energize or de-energize the auto headlamp relay, horn relay, park lamp relay, Powertrain Control Module (PCM), and the security set lamp.

The BCM is mounted under the driver side outboard end of the instrument panel, behind the instrument panel support armature and below the outboard switch pod. Refer to Instrument Panel, Gauges and Warning Indicators/Instrument Panel Systems for the removal and installation procedures. For diagnosis of the BCM or the CCD data bus, the use of a DRB scan tool and the proper Diagnostic Procedures are recommended. The BCM can only be serviced by an authorized electronic repair station. Refer to the latest Warranty Policies and Procedures for a current listing of authorized electronic repair stations.

Power Window System
One of the functions and features that the BCM supports and controls, is the power window system. The BCM receives inputs from the ignition switch and the door ajar switches. The programming in the BCM allows it to process the information from these inputs and send ignition switch and door ajar status messages to the Driver Door Module (DDM) and the Passenger Door Module (PDM) on the CCD data bus. The DDM and PDM use this information to control the lighting of the power window switch lamps, and to control the operation of the power window after ignition-off feature.

The BCM is mounted under the driver side outboard end of the instrument panel, behind the instrument panel support armature and below the outboard switch pod. Refer to Instrument Panel, Gauges and Warning Indicators/Instrument Panel Systems for the removal and installation procedures. For diagnosis of the BCM or the CCD data bus, the use of a DRB scan tool and the proper Diagnostic Procedures are recommended. The BCM can only be serviced by an authorized electronic repair station. Refer to the latest Warranty Policies and Procedures for a current listing of authorized electronic repair stations.