192004516 - E2510 COURTESY LIGHTS - DESCRIPTION (Right hand drive)

Description

The front courtesy light includes three bulbs with three control switches:

  • the map reading lights can be switched on via the outside switches.
  • the centre switch can be used to switch the centre light on or off and it also has a delay function as described below.
The rear courtesy light has two bulbs, which can be switched on or off by operating the appropriate switch and there is also a delay function as described below.

The front courtesy light timing is controlled according to a logic managed by the Body Computer, whilst that of the rear is controlled by the door control units in accordance with a logic transmitted via the CAN from the Body Computer:

  • when one of the doors is opened, the courtesy lights are timed to stay on for 3 minutes;
  • if, whilst opening one door, another is opened, the counting of the three minutes starts again from zero;
  • if a door remains open for longer than three minutes, the courtesy lights go out and remain off until one of the doors is next opened;
  • If, during this period of 3 minutes, all the doors are closed again, a second period of 20 seconds is activated and is interrupted if the ignition key is turned on.
  • when the doors are opened using the remote control (or Passive Entry), the courtesy lights come on for 20 seconds; the timing is interrupted if the ignition key is turned ON;
  • when the remote control is used to lock the doors, the courtesy lights go off.
The switching off and on should be gradual (dimmer) with a cycle lasting 2 seconds.When the ignition key is turned OFF, the Body Computer checks that the key has actually been removed (no transponder): in these circumstances it switches the front and rear courtesy lights on as described previously.The courtesy lights are also on (without the dimmer) if the inertia switch is operated (the information is sent via the instrument panel CAN).The function is activated with the ignition key in the ON position.The Body Computer continuously acquires the ''battery voltage'' signal and compares it with a limit (''SBMT'' function): if the battery voltage level measured is below this limit, it intervenes through the CAN sending a signal to disable a series of loads: these include the two front and rear courtesy lights; the function is activated with the ignition key in the OFF position.