The heated rear windscreen relay T11, located in the junction unit under the dashboard B2, controls the engagement of the heated rear windscreen P55 defrosting resistances via the line protected by fuse F40 of junction unit B2.Similarly, the engagement of the defrosting resistances for the windscreen P56 are operated via the line protected by fuse F41 of junction unit B2 and relay T22 and fuse F59 located in the boot junction unit B45.The coil for relay T11 receives an ignition-operated power supply (INT/A) and is energized by an earth signal coming from the Body Computer M1 - pin 6 of connector F; this signal is sent on the basis of the previously illustrated control logic and in the presence of the heated rear windscreen engagement command or through the MAX-DEF function coming via the CAN from the climate control system control unit M70.The engagement of the defrosting resistances for the door mirrors P60 and P61 is controlled by the control units for the driver''s door M66 and passenger door M67 connected via the CAN line to the Body Computer M1.Control units M66 and M67 receive a supply - at pin 11 of connector D - from the line protected by fuse F32 of underfacia control unit B2 .On the basis of the complex control logic illustrated previously, the engagement command for the defrosting is sent via the CAN to the two door control units as well which control the resistances located in mirrors P60 and P61 from pins 7 and 9 of connector E of M66 and M67.