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 sensor, the PSDB, the VQM, and the generator via a Local Interconnect Network (LIN) bus.