Body Control Module (BCM)

The BCM  is responsible for checking the identifications from both the RFA  module and the PCM  . It also controls the ignition states and determines if the engine should be started or turned off depending upon input from the start/stop and brake switches and if a programmed Intelligent Access (IA) key is inside the vehicle. The RFA  module sends a MS-CAN  message to the BCM  indicating if a programmed Intelligent Access (IA) key is inside the vehicle.

If the BCM  is replaced, the two parameter reset procedures must be performed to enable PATS  . The two parameter reset procedures are between the BCM  and RFA  module, and the BCM  and PCM  .