3315617 - E3040 CENTRAL LOCKING - Functional description

Functional description

The control unit M40 manages the operation of the central door locking system. The control unit is supplied directly by the battery.  See E3050  ELECTRIC FRONT WINDOWS The control unit M40 receives the commands to lock (pin 16 of connector B) or unlock (pin 15 of connector B) the frotn doors, coming from the switches (handles) in the front locks N50 and N51, or the remote control receiver M35 at pins 12 and 13 of connector A (for this component See E7015 ALARM : it is the same commands that light up the 'doors open' LEDs in the instrument panel and which control the timing of certain lights See E2510 COURTESY LIGHTS . The control unit also receives signals on the state of the locks for the rear doors, coming from geared motors N55 and N56, at pins 15 and 16 of connector B, respectively. these are the same signal which light up the 'doors open' LEDs in the instrument panel and which control the timed operation of some lights  See E2510  COURTESY LIGHTS . The control unit M40 commands the locks on the basis of the logic illustrated previously: the lock/unlock signals for the motors of the front doors ( N50 and N51) and rear doors (N55 and N56). Control unit M40 riceives signals from the switch on tunnel control unit H36 to lock/release the doors from the inside at pins 14 and 17 (connector B)