3234041 - E3040 CENTRAL LOCKING - Description

Description

The simultaneous operation of the four lock motors takes place upon a command:

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

Lock operation is controlled by the integrated service control unit located on the right hand side beneath the facia.The control unit monitors lock status by means of signals received from switches located on the four locks (these signals are also used to time the lighting). A lock command is issued only when all doors are properly closed and the front locks are released. Conversely, a release command is issued only when the front catches are locked. Conversely, a release command is issued only when the front catches are locked.

The control unit also runs a series of safety checks:

• switch position is checked at the end of each operation. If this position does not agree with the action carried out (e.g. if a door is open), a repulsion command is issued, i.e. the opposite manoeuvre is carried out to realign all the locks.
• if the control unit detects too many complete, consecutive lock/release manoeuvres - at least 8 within 20 seconds - the system cuts in to limit the manoeuvres: the system is inhibited in release position for 30 seconds.
• if battery voltage drops below 9 V during a lock/release operation, the system suspends the operation. If battery voltage is lower than 9 V at the outset, no command is issued.

The door lock circuit is protected by a special fuse located in the junction unit.The remote control receiver has supplies (direct and controlled by the ignition) protected by two fuses located in the junction unit.