S 55 AMG (220.173) V8-5.5L (113.982) (2001)
Air Door Actuator / Motor: Description and Operation
Vacuum Element For Footwell Flap
Purpose
The footwell flap actuator motors actuate the footwell flaps for control of the air flow to the front and rear footwells.
Function
The footwell flap actuator motors are controlled via the A/C bus and electronic stepping motor control module by turning the air distribution knob on the
automatic A/C pushbutton control module. The footwell flap actuator motors thereby control the footwell flaps which can assume the following positions
depending on the settings
Circuit logic:
-
Footwell and rear footwell closed = 50%
-
Footwell completely open and rear footwell closed = 100%
(vehicles with rear air conditioning)
-
Footwell and rear footwell completely open = 0%
(vehicles without rear air conditioning)
Control for "DEFROST" 50%
Control for "REST"
depending on exit temperature
Control for "O"
500%.
Control for "AUTO"
depending on exit temperature
Footwell flap actuator motor control via automatic A/C pushbutton control module without rear air conditioning
(air distribution switch position indicated by hour hand position on 12 hour clock)
Footwell flap actuator motor control via automatic A/C pushbutton control module with rear air conditioning (air distribution switch position indicated
by hour hand position on 12 hour clock)