E3040 Door locking device

Description

The door locks are operated simultaneously by:

• the key;
• the door handles;
• the button on the dashboard;
• the remote control.

Lock operation is managed by the Body Computer, which controls:

• the actual state of the locks by means of the signals which arrive from the switches located on the locks themselves (signals also used for timing the lights): in this way, the 'lock' command is only issued when all the doors are properly closed and the locks released; conversely, the 'release' command is only issued when the locks are locked;
• the switch position. If this position does not agree with the action carried out (e.g. if after the lock command a door is open), a repulsion command is issued, i.e. the opposite manoeuvre is carried out to realign all the locks.
• several consecutive and complete lock/release manoeuvres: if the control unit detects at least 10-11 manoeuvres within 25 seconds - the system cuts in to limit the manoeuvres: the system remains inhibited in the unlock position for 30 seconds
• if the battery voltage falls below 8-10 V during a lock/release operation, the system suspends the operation. If battery voltage is lower than 8 V at the outset, no command is issued.

The signals coming from the door (and boot) open switches together - when the ignition is on - switch on the specific warning light on the instrument panel.

The remote control receiver aerial is connected directly to the Body Computer which contains the electronics of the receiver proper: the remote control in the key has two separate buttons: one controls the door lock, the other the release (a third button controls the boot release Wiring diagram E3046 BOOT OPENING ).

If within 60 seconds from the lock release command issued via the remote control, the user has not shown his intention to take possession of the car (opening of doors and/or boot and ignition turned on), the locks are automatically LOCKED.

The door lock/release button is located on the central panel: if the doors are closed, pressing the button releases them; vice versa if they are open, they are locked; an LED at the back of the button also comes on.

The door lock circuit is protected by a special fuse located in the unit under the dashboard.

Description of operation

The door lock command, inside the Body Computer M1 - pin 1 of connector F - has the supply line protected by fuse F38 in the unit under the dashboard B2; it also has a dedicated earth connection: pin 20 of connector F.

The Body Computer M1 receives as input:

• the 'lock' signals from the handles (or key in the lock) at pins 24 (left door - N50) and 17 (right door - N51) of connector E.
• the 'release' signals from the handles (or key in the lock) at pins 34 (left door - N50) and 35 (right door - N51) of connector E.
• the 'door open' signals at pins 8 (left door - N50) and 25 (right door - N51) of connector E;
• the signal from the lock/release button, located in the controls unit H12, at pin 2 of connector D; (the button is lit when the doors are unlocked by the ignition-dependent line (INT) of fuse F49 of unit B2);
• the signals coming from the aerial-receiver P93, which is connected to pins 21 and 31 of connector A.

In accordance with the control logic described above, the Body Computer M1 controls the lock motors of the left door N50 and right door N51, from pins 10 and 11 of connector F.

Via the CAN line, the Body Computer M1 is connected to the instrument panel E50, to which it sends a signal which, when necessary, lights up the 'doors open' warning light.

Wiring diagram

Components

Component location