3239344 - E3050 ELECTRIC FRONT WINDOWS - Functional description
Functional description
The integrated services control unit M40 manages the operation of the electric front windows. The direct supply from the battery for the specific control unit M40 for the electric windows (pins 15 and 16 of connector A) arrive from the line for maxifuse J/B1 (of B99) and fuse F12 of the junction unit B1, whilst the supply controlled by the ignition arrives at pin 7 of connector B from the line for fuse F1. pins 4 and 20 of connector A provide the reference earth for the passenger and the driver's electric windows, respectively. The switches H40 (driver's electric window), H41 (passenger electric window on driver's door) and H50 (passenger electric windoe on passenger front door) receive a supply controlled by the ignition (INT/A) from the line from fuse F6 of the additional fuse box B98B, and are earthed C20: in this way they are also lit up when the ignition is switched on.When the switches are operated, they send control signals (positive and negative) to control unit M40:
- at pins 10 and 11 of connector A from switch H40 ;
- at pins 5 and 18 of connector A from switch H41 ;
- at pins 2 and 6 of connector A from switch H50 ;
The control unit M40 operates the electric windows on the basis of the logic described previously:
- from pins 8 and 9 of connector A it sends commands to the driver's electric window motor N60
- from pins 1and 3 of connector A it sends commands to the passenger electric window motor N61.