Body Control Module / Gateway Module Assembly

The Body Control Module/Gateway Module (BCM/GWM) assembly is attached to a bracket, which is bolted to the passenger side of the cross-car beam, behind the instrument panel.

The BCM/GWM assembly is located adjacent to the Passenger Junction Box (PJB), and it is the main controller of the vehicle body systems.

The BCM/GWM assembly contains software to control the following functions:

• Determine condition of primary and auxiliary batteries.
• Generator output. Control the generator output to reach a desired system voltage or target battery state of charge.
• Load management. Load management can control off certain loads in the event of stop/start events and the 12 V power system being overloaded.
• Control stop/start system functionality. The BCM/GWM assembly can only inhibit stop/start functionality depending on power system condition. The BCM/GWM assembly also provides supporting functionality via load management and Power Supply Distribution Box (PSDB)/Voltage Quality Module (VQM) control.
• Control the PSDB to enable the switching of the battery inputs.

The BCM/GWM assembly communicates with other system control modules on the followings:

• High Speed (HS) Controller Area Network (CAN) powertrain systems bus
• HS CAN power mode zero systems bus
• HS CAN chassis systems bus
• HS CAN comfort systems bus
• Medium Speed (MS) CAN body systems bus
• Over the flexray network system.

The BCM/GWM assembly communicates with the BMS control module, the PSDB, the VQM, and the generator via a Local Interconnect Network (LIN) bus.