Service relay R21, located in boot junction unit B045, allows the supply of heat pads in the heated seats via protected battery-activated lines:
from fuse F57 for the driver''s side front seat- via driving position control unit M076 (pin C8 of connector C) - and passenger side seat - via heater control unit M110 (pin 8) -;
from fuse F59 for right and left rear seats, via heater control units M112 and M111 (pin 8) respectively.
Relay R21 is enabled by boot control unit M063 (pin 24 of connector F), which in turn downloads feedback signals respectively:
at pin 35 of connector F of driving position control unit M076 (pin B6 of connector C);
at pin 38 of connector G of front passenger seat heater control unit M110 (pin 6);
at pin 6 of connector D of rear left seat heater control unit M111 (pin 6);
at pin 28 of connector G of right rear seat heater control unit M112 (pin 6);
The driver''s side front esat heat pad activation control I065 is directly connected to the driving position control unit at pins C2, B7 and C8 of connector A; the driver''s side front seat pad O046 and the heat pad in backrest O048 are supplied via pin B1 of connector A of the control unit. The sensor inside the seat heat pad is connected to the driving position control unit M076 at pins B2 and C7 of connector A; the control unit is supplied by a line protected by fuse F69 of boot junction unit B045 at pin C7 of connector C.the heat pads (cushion and backrest) of front passenger seat O047 and O049, left rear seat O042 and O044 and right rear seat O043 and O045, are connected to their respective control units at pin 5 for the power supply and pins 4 and 7 for the seat interior temperature sensor signal.The rear seat heating device (left and right seats) is activated by controls on the rear armrest H085 and H086, connected to pins 1, 3 and 9 (power supply, earth and selected heater level signal) of the control units of the left rear seat heater M111 and the right rear heater M112 respectively.Infotelematic control unit M065 displays a front seat heat pad activation message via a signal downloaded from the B-CAN network at pins 1 and 3 of connector D. The control unit is supplied by a line protected by fuse F39 from underfacia control unit B002 (pin 7 of connector D).Body Computer M001 receives an INT/A (key-on) signal from ignition switch H001 at pin 27 of connector D via fuse F31 of underfacia control unit B002.