Functioning of the Body Control Module in Cars

the body control my

to all the electronic system

in a car we'll take a look at the

various body control module functions

power to control the way the brain is

central to the functioning of a human

body the body control module is of equal

importance to a car today new cars come

equipped with various features like

power windows power steering inbuilt

bluetooth systems etc now all these

systems come with their own electronic

control units which keep a tab on these

systems all these control units perform

independently hence there is the need of

a system that incorporates the various

systems in the car and introduces some

uniformity in their functioning and

coordination this is where a body

control module BCM comes into the

picture one of the most important

functions of this module is to

communicate and coordinate with other

modules through the vehicle bus module

it is an embedded system that has

control over the various electrical

systems of the vehicle it controls the

load drivers which in turn activate the

relays the location of the BCM is

generally behind the kick panel in the

vehicle or under the dashboard of a car

the controlling part is done in the

microcontroller that is present in the

BCM the block diagram above gives a

general representation of this the input

devices fee the data to the control

module the devices that can be input to

this module are sensors variable

reactors etc whereas the output devices

are the devices that generate a response

to the signal from the input devices

these devices include the like of relays

and solenoids among others through these

the BCM exercises control over various

systems the glue logic is a customized

circuit that serves as an interface for

other standard as well as customized

circuits what does a body control module

do the BCM is a core component and can

perform many functions it takes the data

from the input devices the output

devices are controlled based on this

with the help of a Lin local

interconnect Network or can

controller area network which is used

for communication between various

modules in the vehicle there are many

electronic systems that have control

over various functions present in the

car and all these electronic modules

come under the control of the BCM the

BCM regulates the operation of various

systems present in a car these

operations can take place simultaneously

as this module can handle multitasking

in an efficient manner it can also

detect the malfunctioning in the wiring

or components based on the consumer

needs different variations in AB ECM can

be introduced by varying the

architectural approach the control

module through the microcontroller can

take care of the power distribution in

the system along with keeping the fuse

box safe some of the systems that come

under the control of the body control

module are alarm energy management

immobilizer driver assistance access /

driver authorization power windows the

systems under the control of the BCM

include comfort as well as security

systems it must have a design that can

adapt to the changes in the future this

can be achieved through its flexible

architecture it must also be energy

efficient and consume minimum energy

when on standby mode users must take

their requirement of various parameters

into consideration when buying a BCM the

body control module is adaptable to best

suit user requirements along with being

cost-efficient because of the reduced

wiring users must keep an eye on the

software of the BCM along with its

hardware this should not be a problem as

be CMS have a tosser automotive open

system architecture compatibility of the

software with the car system is as

important as its hardware compatibility