BCM Functions
The body control module (BCM) is capable of accomplishing multiple body control functions. Components directly connected to the BCM are controlled by the BCM outputs. The BCM can control its outputs based on input information it obtains from sensors and
switches that are directly connected to the BCM, or by receiving information from other vehicle systems connected to the class 2 serial data link. The BCM evaluates this information and controls certain body systems by commanding an output ON or OFF.
The BCM is also capable of commanding other vehicle systems to control functions that are not directly wired to and/or controlled by the BCM. The BCM accomplishes this task by sending specific messages on the class 2 serial data link. The vehicle
system capable of performing such function will respond to the BCM message.
The BCM controls/monitors the following functions:
• | Power/automatic door locks |
• | Content theft deterrent |
• | Electrical power management |
Power Mode Master
This vehicles body control module (BCM) functions as the power mode master (PMM). Refer to
Ignition and Start Switch Replacement
.
Audible Warning
The body control module (BCM) provides the following audible control functions. Some audible control functions may be controlled by other systems through the class 2 serial data link:
• | Key in ignition reminder |
• | Delay locking indication |
• | Keyless entry programming/diagnostic mode indication |
Refer to
Audible Warnings Description and Operation
.
Indicator Control
The body control module (BCM) provides the following indicator control functions through the class 2 serial data circuits. Some indicator control functions may be controlled by other systems through the class 2 serial data link:
Refer to
Instrument Cluster Description and Operation
and
Indicator/Warning Message Description and Operation
.
Interior Lighting
The body control module (BCM) provides the following interior lighting functions. Some interior control functions may be controlled by other systems through the class 2 serial data link:
• | Interior illumination control |
• | Illumination on key cylinder unlock |
• | Illumination after air bag deployment |
• | Keyless entry unlock illumination |
• | Interior lighting personalization |
Refer to
Interior Lighting Systems Description and Operation
for more information.
Exterior Lighting
The body control module (BCM) provides the following exterior lighting control functions. Some exterior lighting control functions may be controlled by other systems through the class 2 serial data link:
• | Daytime running lights (DRL) |
• | Exterior lighting personalization |
Refer to
Exterior Lighting Systems Description and Operation
for more information.
Power/Automatic Door Locks
The body control module (BCM) provides the following power/automatic door lock control functions. Some door lock control functions may be controlled and/or sent by other systems through the class 2 serial data link:
• | Last door closed locking |
• | Lockout prevention override |
• | Unlock after air bag deployment |
• | Delayed locking override |
• | Power/automatic door lock personalization |
Refer to
Power Door Locks Description and Operation
for more information.
Keyless Entry
The body control module (BCM) provides the following keyless entry control functions. Some keyless entry control functions may be controlled and/or sent by other systems through the class 2 serial data link:
• | Remote driver door unlock |
• | Remote activation verification |
• | Keyless entry personalization |
Refer to
Keyless Entry System Description and Operation
for more information.
Content Theft Deterrent
The body control module (BCM) provides the following content theft deterrent control functions. Some content theft deterrent control functions may be controlled and/or sent by other systems through the class 2 serial data link:
- | Status of the doors and rear endgate |
- | The keyless entry system |
- | Disables fuel delivery to the engine |
• | Content theft deterrent personalization |
Refer to
Content Theft Deterrent (CTD) Description and Operation
for more information.
Personalization
The body control module (BCM) provides personalization of vehicle functions which allow BCM features to be personalized based on driver preferences. The following vehicle functions may be personalized:
• | Interior lighting delay |
• | Remote driver door unlock |
• | Remote lock/unlock confirmation |
Refer to the following
Personalization Description and Operation
for more information on how to set personalized options.