2000 ACCESSORIES & EQUIPMENT
Body Control Modules - Escalade, Tahoe & Yukon Denali
DESCRIPTION
Body Control Module (BCM) is designed to process various input information it receives from sensors and
switches or borrows from other vehicle systems connected to class 2 serial data line. BCM evaluates this
information and controls certain body systems by commanding an output on or off.
BCM can also command other vehicle systems to control functions by sending specific messages over class 2
serial data line. BCM controls operation of audible warnings, indicator warnings, power door locks, remote
keyless entry, Passlock(tm) theft deterrent, content theft deterrent, interior and exterior illumination.
BCM goes into low power mode (asleep state) when ignition has been turned off and 20 minutes have elapsed
without any wake up signals. BCM goes into high power mode (wake up state) after receiving any wake up
signals.
The class 2 serial data line allows communication between modules and scan tool. Modules on the class 2 serial
data line are:
Body Control Module (BCM).
Instrument Panel Cluster (IPC).
Transfer Case Control Module (TCCM).
Powertrain Control Module (PCM)/Vehicle Control Module (VCM).
Supplemental Inflatable Restraint (SIR) Module.
Electronic Brake Control Module (EBCM).
OPERATION
ASLEEP & AWAKE FUNCTIONS
NOTE: This article applies to "old style" "C" & "K" Series vehicles equipped with 5.7L,
6.5L and 7.4L engines. Old style pickups are not equipped with a Body Control
Module (BCM). For "new style" "C" & "K" Series vehicles equipped with 4.3L,
4.8L, 5.3L and 6.0L engines, see BODY CONTROL MODULES -- SIERRA,
SILVERADO, SUBURBAN, TAHOE, YUKON & YUKON XL article.
WARNING: Vehicles are equipped with Supplemental Inflatable Restraint (SIR)
system. Before attempting ANY repairs involving steering column,
instrument panel or related components, see SERVICE PRECAUTIONS
and DISABLING & ACTIVATING AIR BAG SYSTEM in appropriate AIR BAG
RESTRAINT SYSTEMS article.
2000 Cadillac Escalade
2000 ACCESSORIES & EQUIPMENT' 'Body Control Modules - Escalade, Tahoe & Yukon Denali
2000 Cadillac Escalade
2000 ACCESSORIES & EQUIPMENT' 'Body Control Modules - Escalade, Tahoe & Yukon Denali
Microsoft
October-22-10 7:55:08 PM Page 1 ©
2005 Mitchell Repair Information Company, LLC.
Microsoft
October-22-10 7:55:24 PM Page 1 ©
2005 Mitchell Repair Information Company, LLC.
