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•
Chime Driver
•
Compass/Minitrip Support
•
Interior Lighting (Courtesy/Reading Lamps)
•
BCM Diagnostic Reporting
•
Electronic Liftgate Release (with Power Door
Locks)
•
Exterior Lighting
•
Headlamp Time Delay (with/without Autohead-
lamps)
•
Automatic Headlamps (with electrochromatic
mirror)
•
Illuminated Entry
•
Fade to Off
This feature dims the interior lighting (courtesy
lamps) gradually if the BCM does not receive any
new inputs that would cause the interior lamps to
remain on.
•
PWM Instrument Panel Dimming
•
Door Lock Inhibit
This feature disables the door lock functions if the
key is in the ignition and either front door is ajar.
Pressing the RKE lock/unlock button under these
conditions, result in normal lock/unlock activation.
•
Power Sliding Door Switch Inputs
The BCM has 4 switch inputs for the power
sliding door feature: Located in the overhead con-
sole are the Left and Right side sliding door
switches to activate either or both sliding doors
under the proper conditions. Also there are B-Pillar
switches located on the Left and Right B-pillar
posts.
•
Power Liftgate Switch Input
The BCM has 1 Liftgate switch input located in
the overhead console
•
Power Lockout Switch Input
The BCM has 1 Lockout switch that when en-
abled will disable the B-Pillar sliding door switches
from activating either sliding door when depressed.
When replacing a body control module there are 2
modules available, a Base and a Midline. The
Midline controller is used on vehicles that have
Power Door Locks. If a vehicle is equipped with the
Vehicle Theft Security System, the midline control-
ler becomes a premium when the theft feature is
enabled.
NOTE: Do not swap the body control module
between vehicles or body control modules
off the shelf.
Engineering does not recommend that service,
dealers or the plant swap Body Control Modules
GENERAL INFORMATION
(BCM) between vehicles or off the shelf. The BCM
has internal diagnostic capability that assists in
diagnosing the system. When an "Open" or a
"Short" circuit exists, the diagnostic tool can be
used to read the BCM codes. The codes are very
descriptive in identifying the appropriate feature
that has faulted. The BCM also learns what fea-
tures are on the vehicle and if modules are swapped
the BCM could set false DTCs based on what it
learned.
3.4 CHIME WARNING SYSTEM
The
BCM
monitors
switches, multifunction switches, headlight switch,
ignition switch, PCI bus, and the diagnostic tool to
perform various chime operations. The BCM uses a
low-side driver to control the chime located in the
cluster.
The chime system provides the Driver with warn-
ing chimes for:
•
Seat belt
•
Exterior lights on
•
Key-in Ignition
•
Key-in Accessory
•
Engine temperature critical
•
Low washer fluid
•
Turn signals on
•
Dome light on
•
Low oil pressure
•
Any warning lamp announcement
•
High-speed warning Gulf Coast Countries (GCC)
only
The output sound intensity of the chime is ap-
proximately 72 decibels.
3.4.1 CHIME PRIORITY
The following list indicates the priority of the
chime when more than one chime is active at the
same time:
•
Seat belt warning
•
High-speed warning Gulf Coast Countries (GCC)
only
•
Turn signal on
•
Chime request
•
Warning lamp announcement
The cluster is responsible to set priority on all
warning lamp announcement chimes.
9
the
door/liftgate
ajar
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