Heated front seats
The front seats can be heated in two modes. It can be controlled by one of the two left or right front door control box switches (N69/1) / (N69/2). The heating mode is indicated by two (three) LEDs. above the switches. Heating is produced by rectangular voltage pulses (20-30 Hz). The duty cycle in mode 1 is 3.7, and in mode 2-1 (refer to section Using an oscilloscope to observe signals in control circuits). Switching off is carried out manually or by a corresponding control unit (after a certain time).
Heated rear seats
The rear seats are heated in the same way as the front seats.