Grand Cherokee 2WD L6-4.0L VIN S (1997)
When the ignition switch is in the START or RUN position, it connects circuit A1 from fuse 8 in the PDC to circuit A21. Circuit A21 powers
circuit F99 through PDC fuse 18. Circuit F99 feeds the BCM.
In the ACCESSORY or RUN position, the ignition switch connects circuit A1 to circuit A31. Circuit A31 powers circuit V23 through fuse 3 in the
junction block. Circuit V23 feeds the BCM.
The Body Control Module (BCM) used in this vehicle provides a communication interface with other controllers and modules. The BCM also
controls various vehicle functions. Circuit operation of specific systems or components controlled by the BCM are found in wiring diagram section
covering the component or system.
The BCM provides or supports the following features:
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A/C Select Switch Status
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Ambient Temperature
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Automatic Funeral Mode
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Automatic Headlamp Control
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Chime
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Courtesy Lamps with Time Out
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Door, Hood or Liftgate Ajar Status
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Door Lock Inhibit
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Electronic Odometer
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Electronic Vehicle Information Center
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Fog Lamp Control
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Headlamp Delay
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High Beam Indicator
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Illuminated Entry
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Instrument Panel Dimming
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Intermittent Wiper Control
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Liftgate Courtesy Lamp Disable
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Mechanical Instrument C1uster
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Rear Window Defogger Control
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Remote Radio Control
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Seat Belt Reminder
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Speed Sensitive Intermittent Wipe Control
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Vehicle Theft Security System
The BCM communicates with the following controllers and modules over the CCD bus:
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Automatic Temperature Control (ATC) Module
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Compass (Overhead Console)
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Driver Door Module (DDM)
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Mechanical Instrument C1uster
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Memory Seat Module
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Passenger Door Module (PDM)
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Powertrain Control Module
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Vehicle Information Center
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Radio
Circuit A250 from fuse 11 in the Power Distribution Center (PDC) powers circuit F75 through fuse 7 in the junction block. Circuit F75 supplies
battery voltage to the BCM. Circuits Z1 and Z2 provide ground for the BCM.
GENERAL INFORMATION
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.
Some of the functions and features that the BCM supports or controls, include:
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Chimes
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Automatic headlamp control
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Headlamp delay
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Headlamps on with ignition off and driver door open warning
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Key in ignition with ignition off and driver door open warning
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Automatic funeral or parade mode
