BCM Input/Output Information

The following components provide direct input to the BCM. Other systems can use this input information in order to carry out various functions:

BCM Inputs
^ Ambient Light Signal Processing - provides the BCM with the ambient light input information for interior lamp illumination and automatic headlamp operation.
^ Column Feedback Switch - provides steering column feedback information to the BCM in order to determine if the steering column was successfully locked or unlocked.
^ Door Ajar Switches - provides door ajar status to the BCM.
^ Fog Lamp Switch, Front - provides fog lamp switch activation input to the BCM in order to turn the front fog lamps ON or OFF.
^ Fog Lamp Switch, Rear (export)- provides fog lamp switch activation input to the BCM in order to turn the rear fog lamps ON or OFF.
^ Folding Top Ajar Switch-provides folding top ajar status to the BCM.
^ Folding Top Release Switch - provides folding top release switch information to the BCM.
^ Hatch Ajar Switch - provides hatch ajar status to the BCM.
^ Hatch Release Switch - provides hatch release switch information to the BCM.
^ Headlamps OFF - provides the BCM with headlamps ON or OFF status for automatic headlamp operation.
^ Hood Ajar Switch (export)- provides hood ajar status to the BCM.
^ Ignition Switch - provides the BCM with ignition position status.
^ Key In/Out Ignition Switch - allows the BCM to detect when a key is IN or OUT of the ignition.
^ Monitored Loads - monitors electrical loads left ON after the ignition switch is turned OFF.
^ PASS-Key� Resistance - determines the resistance of the key pallet for the PASS-Key� system.
^ Rear Defogger Switch - provides rear defogger switch activation input to the BCM in order to turn the rear defogger ON or OFF.
^ Turn Signal Monitor, LH/RH - monitors the turn signal status for the DRL.
^ Traction Control System (TCS) Switch - provides traction control switch activation input to the BCM in order to turn the TCS ON or OFF.

The BCM directly controls the following outputs. Other systems may request the BCM to control these outputs for various functions:

BCM Outputs
^ Automatic Headlamp/Parklamp Control - provides output control to turn ON the headlamps and parklamps when it's dark outside.
^ Backup Lamp Relay - provides output control in order to energize the backup lamp relay for UTD and Approach Lighting functions.
^ Console Lamp Dimming Control - controls the console lamp illumination when the headlamps or the parklamps are ON.
^ Courtesy Lamp Relay - provides output control in order to energize the courtesy lamp relay when the courtesy lamp switch is ON.
^ DRL Relay, LH - when energized, the relay allows the BCM to use the LH front turn signals for DRL, Approach Lighting, and UTD functions.
^ DRL Relay, RH - when energized, the relay allows the BCM to use the RH front turn signals for DRL, Approach Lighting, and UTD functions.
^ Fog Lamp Relay, Front - provides output control in order to energize the front fog lamp relay when the fog lamp switch is ON.
^ Fog Lamp Relay, Rear (export)- provides output control in order to energize the rear fog lamp relay when the fog lamp switch is ON, or for Approach Lighting and UTD functions.
^ Folding Top Release Relay-provides output control in order to energize the folding top relay when the folding top switch is pressed.
^ Hatch Release Relay-provides output control in order to energize the hatch release relay when the hatch release switch is pressed.
^ Horn Relay - allows the BCM to energize the horn relay for UTD and RFA system functions.
^ HVAC Lamp Dimming Control - controls the HVAC lamp illumination when the headlamps or the parklamps are ON.
^ Monitored Load Relay - provides output control for the monitored load relay, allowing the BCM to shut off certain electrical loads in order to prevent battery rundown.
^ PRNDL Lamp Control - controls the PRNDL lamp illumination when the headlamps or the parklamps are ON (A/T only).
^ Rear Defogger Relay - provides output control in order to energize the rear defogger relay when the rear defogger switch is pressed.
^ Steering Column Lock/Unlock Control - provides output to control drive A and drive B for steering column lock/unlock operation.
^ Steering Column Lock Relay - allows the BCM to disable steering column lock functions.
^ Theft Deterrent Relay - allows the BCM to energize the theft deterrent relay for UTD functions.