2889039 - E3040 CENTRAL LOCKING - Description

Description

The door lock motors are operated simultaneously upon a command:

• from the key;
• from the front door switches (knobs);
• from the remote control (if present)

Locking operation: when the key is used on one of the two front doors or the remote control is operated when the doors are firmly shut and the front locks locked, all four side doors are locked simultaneouslyUnlocking operation: when the key is used on one of the two front doors, with front locks locked, or the remote control is operated, all four doors are unlocked.This control logic is controlled by the specific control unit in the driver's glove compartment

The control unit also carries out a series of safety checks:

• the control unit checks the actual status of the locks: the "lock" or "unlock" command is only executed with the doors properly closed: if the door being operated is not shut properly, the command is inhibited; if the door opposite that being operated is not shut properly, and an immediate "repulsion" is carried out (i.e. the opposite action is carried out to "realign" the locks).
• if there is a rapid succession of alternating lock/unlock commands, the control unit only carries out the first three commands without activating the inhibition. Similarly if 8/9 opening and closing actions are carried out in 20 seconds (the last is always a closure), the circuit is then inhibited for about 30 s.
• the circuit can be further inhibited if the battery voltage falls below 9 V within 20 ms. from the start of activation of the lock/unlock actions. During the inhibition time (30 s), the commands are ignored.

The locking or unlocking command is also carried out via the remote control receiver, both on versions with an alarm and on versions with a door remote control only.On versions with an alarm, the locking or unlocking command is also carried out via the remote control receiver.The central locking circuit is protected by a special fuse next to the junction unit.