BCM Inputs

The following components provide direct input to the BCM, plus other systems can use this input information in order to carry out certain functions:
^ BCM Ground: Provides ground for BCM operation.
^ BCM Power: Provides voltage for BCM operation.
^ Courtesy Lights On: Provides the driver the ability to request illumination of the vehicle interior.
^ Crank Signal: Determines when the ignition switch is in the start position.
^ DRL Link: Provides an interface to the DRL control module allowing the BCM to determine the current ambient light operating mode for the twilight sentinel feature.
^ Door Lock Switch: Door lock switch request to lock vehicle doors.
^ Door Locks: Provides voltage for door lock actuator operation.
^ Door Open: Provides door ajar status.
^ Door Unlock Switch: Door lock switch request to unlock vehicle doors.
^ Driver Door Open: Allows certain chime functions when the driver's door is open.
^ Driver Seat Belt Unfastened: Determines when the driver's seat belt is unfastened through the seat belt switch.
^ Exterior Lamps Off: Determines when the headlamp switch is in the OFF position.
^ Ignition 0 Signal: Determines when the ignition switch is in accessory, on, or start position.
^ Ignition 1 Signal: Determines when the ignition switch is on and start positions.
^ Illuminated Entry: Determines when an exterior door handle is pulled for interior courtesy light operation.
^ Key In Ignition: Determines when the key is fully inserted in the ignition key cylinder.
^ Park Brake Applied: Determines when the parking brake is applied.
^ Passlock Sensor Data: Reads the Passlock sensor security code.
^ RFA Link: Provides an interface allowing the transfer of keyless entry information from the Remote Control Door Lock Receiver (RCDLR).
^ Serial Data: provides an interface with the PCM, EBTCM, and the PC through the Class II serial data link.