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ELECTRICAL
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8.25 BODYCONTROLMODULE (BCM):
Body Control Module (BCM) performs various
body electrical functions of the vehicle such as
interior and exterior lighting, wiper and wash
control, perimeter alarm for the theft detection
mechanism, vehicle lock and access control etc,
by considering various inputs from switches,
sensors etc which are connected to it either by
hardwired or through LIN or CAN. BCM controls
the lamps, LEDs, door lock actuators, wash
motors, and electro mechanical relays etc as and
when required depending on the control logics
loaded inside.
BCM communicates with many other ECUs of the
vehicle over CAN. Also, BCM acts as a CAN-CAN
gateway in case the vehicle consist two
independent CAN networks. Similarly, BCM
interacts with the LIN based control units or
sensors and further act as the LIN-CAN gate way
to exchange the necessary information as and
when required with the rest of the ECUs.
BCM controls the complete power mode strategy
of the vehicle where in it communicates about the
current power state of the vehicle to the other
ECUs.
LOCATION:
Left side of dashboard above and behind glow
box, mounted on CCB.
REMOVAL OF BCM:
1. Switch OFF the ignition (if ON).
2. Disconnect battery negative terminal.
3. Remove glow box if required for better access.
4. Disconnect the BCM connection.
5. Remove the three screws & take out the BCM
unit.
REFITMENT OF BCM
Follow the reverse procedure of removal of BCM
TORQUE VALUE TABLE
APPLICATION
TORQUE TABLE
BCM mounting bracket
screw (M6)
2.4 ± 0.1 Nm