When the boot is opened the luggage compartment light is turned
on which goes out when the boot is closed.The Body Computer continuously acquires
the 'battery voltage' signal and compares it with a limit ('SBMT'
function): if the battery voltage level goes below this limit, it
intervenes through the CAN sending a signal to disable a series
of loads: these include the front courtesy light; this function
is activated with the key in the OFF position; this function also
deactivates loads after 15 minutes with the key in the OFF position.