Liberty Limited Edition 2WD V6-3.7L VIN K (2002)
Body Control Module: Description and Operation
Body Control Module Description
Fig.1 Body Control Module Location
Fig.2 Body Control Module
BODY CONTROL MODULE
A Body Control Module (BCM) is concealed behind the driver side end of the instrument panel in the passenger compartment, where it is secured to
the fuse panel side of the Junction Block (JB) with four screws. The JB is the interface between the body the instrument panel, and the headlamp and
dash wire harnesses. The JB also contains the fuses and relays used for the interior electrical system of the vehicle. The BCM is enclosed in a molded
plastic housing with two integral external connector receptacles that connect it to the vehicle electrical system through two take outs with connectors
from the instrument panel wire harness. The BCM also has an integral interface connector concealed on the back side of the unit that joins it through a
connector receptacle that is integral to the JB housing to the circuitry within the JB. This connector is referred to as the JB-BCM connector. The
combined BCM and JB are sometimes referred to as the Junction Block Module (JBM).
There are two different versions of the BCM: base and premium. The base BCM is a subset of the components in the premium version. Basically, the
base version BCM does not support the following features:
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Compass Mini-Trip Computer (CMTC), fog lamps (front and/or rear), Remote Keyless Entry (RKE), remote radio switches, or Vehicle Theft
Security System (VTSS). Both versions of the BCM utilize integrated circuitry and information carried on the Programmable Communications