E. Vacuum Circuit 4, Defroster, Center and Diverter Flaps

E. Checking vacuum circuit 4, vacuum elements for defroster nozzle flaps (38), center nozzle flap (40) and diverter air flap (41) for leaks





1 Press the function selection button "Lower Vents" on the control unit and engage the temperature selector wheel in "MIN".

2 Evacuate with the tester (approx. 400 mbar) and read oft pressure gauge.




3 If the pressure gauge indication changes, individually check the vacuum elements (38, 40 and 41), renew if required or check vacuum lines red/white, red/light blue, medium green and red/black, renew if required.