3315612 - E3040 CENTRAL LOCKING - Functional description

Functional description

The control unit M80 manages the operation of the central door locking system. The control unit is supplied directly from the battery at pin 30 of connector B through the line of the maxifuse CENTR of B5 and fuse F19 of junction unit B1 ; pin 85 of connector A provides the reference earth. The control unit M80 receives input commands for locking (pin 87 of connector B) or for unlocking (pin 87a of connector B) the doors; coming from the remote control switches (knobs) in the front locks N50 and N51 or from the receiver for the remote control M35 (for this component,  See E7015  ALARM ). The control unit also receives signals on the status of the rear door locks, coming from the motors N55 and N56 , at pins 87 and 30 respectively of connector A; they are the same signals which light up the 'open doors' LEDs on the instrument panel and which control the time delay of some lights (  See E2510  COURTESY LIGHTS ). In accordance with the logic described above, the control unit M80 controls the locks: the lock/unlock signals for the motors of the front doors ( N50 and N51 ) and rear doors ( N55 and N56 ) come from pins 85 and 86 of connector B.