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:
^ A/C Request: Provides the BCM with a request signal to command the A/C compressor through the PCM via Class 2 serial data.
^ 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.
^ Dome Lamp Switch Input: Determines when the dome lamp switch (Headlamp Switch) is closed to request the dome lamp on.
^ Door Lock Switch: Door lock switch request to lock and unlock the vehicle doors.
^ Door Locks: Provides voltage for door lock actuator operation.
^ Door Open: Provides door ajar status.
^ Driver Door Open: Allows certain chime functions when the driver's door is open.
^ DRL Signal Low: This input provides the BCM with Information through an ambient light sensor for the DRL feature.
^ Exterior Lamps Off: Determines when the headlamp switch is in the OFF position.
^ Fog Lamp Switch input: This input provides the BCM with a request for fog lamps through a momentary switch connected to ground.
^ Headlamp Switch Input: Determines when the Headlamp switch is closed to request the headlamps on.
^ High Beam: Determines the status of the headlamp dimmer switch, so the BCM can send the instrument cluster a message, via Class 2, to turn on the high beam indicator.
^ Ignition 0 Signal: Determines when the ignition switch is in ACCESSORY, ON or START position.
^ Ignition 1 Signal: Determines when the ignition switch is in the ON and START positions.
^ Key In Ignition: Determines when the key is fully inserted in the ignition key cylinder.
^ Key Unlock: Determines the status of the door lock cylinder switches for content theft.
^ Lamp Request: This input requests the BCM to energize the Battery Rundown Protection relay after the car has been turned off and all the doors have been closed, so the interior lights can be turned on.
^ Park Brake Applied: Determines when the parking brake is applied.
^ Park Lamp Switch Input: Determines when the park lamp switch (Headlamp Switch) is closed to request the park lamps on.
^ Passlock Sensor Data: Reads the Passlock sensor security code.
^ Rear Compartment Ajar: Determines if the rear decklid is open or closed.
^ Rear Compartment Release: This input requests the BCM to open the rear compartment lid.
^ 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, EBCM, Radio, SDM, DIC and the IPC through the Class 2 serial data link.
^ Surveillance Switch Input: Determines when the surveillance switch is closed to request the surveillance mode.
^ Traction Control Request: This input provides the BCM with a request for Traction Control through a momentary switch connected to ground.