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Remove and install footwell vent > < Removing and installing control motor of fresh air flap and re-circulating air flap V154

Octavia Mk1

Check the function of the fresh air flap and re-circulating air flap control motorV154 and the switchE159
Check the function of the fresh air flap and re-circulating air flap control motor -V154- and the switch -E159-
  Note
t  In order for the steam to quickly fade from the steamed-up windows, no re-circulating air operation is possible at “air distribution to front windscreen”. (Switch -E159- is mechanically locked via the rotary switch).
t  Otherwise it could arise that the window panes steam up during the re-circulating air operation (the humidity of the air in the passenger compartment increases and then condenses on the window panes).
Check the function of the switch -E159- and the fresh air flap and re-circulating air flap control motor -V154-
–  Switch on ignition.
   
–  Position rotary switch -A- for the fresh air blower -V2- on speed 3.
–  Turn rotary switch -B- for air distribution in position “air distribution to the dash panel vents”.
–  Do not operate switch -C- for fresh air and re-circulating air flap -E159-.
The air is sucked in via the dust and pollen filter (fresh-air operation, warning light in the switch must not light up).
–  Operate switch -C- (re-circulating air operation, warning light in the switch must light up).
The air is sucked out of the front passenger footwell area (re-circulating air operation).
  S80-0078
–  Turn rotary switch -B- for air distribution up to the stop in position “air distribution to front windscreen”.
The warning light in the switch -C- must go out, the fresh air and re-circulating air flap goes into position fresh air operation (operation of the switch -C- via the rotary switch -B-).
  Note
t  If the function is OK however the window panes steam up:
t  Check dust and pollen filter for contamination → Chapter and compulsive ventilation → Chapter
t  If the function is N.O.K., check switch -E159-.
Check the function of the switch -E159-
–  Remove glove compartment → Body Work; Rep. Gr.70
  S80-0079
–  Remove connector -A- from the fresh air flap and re-circulating air flap control motor -V154-.
–  Switch on ignition.
–  Turn rotary switch for air distribution in position “air distribution to the dash panel vents”.
–  Do not operate switch -E159- (not pressed in).
Fresh air operation, the warning light in the switch must not light up.
–  Connect voltage tester -V.A.G1527B- between the contacts -1- and -3- of the plug connection -A-.
The warning light in the voltage tester must light up.
–  Operate switch -E159- (press).
Re-circulating air operation, the warning light in the switch must light up.
The warning light in the voltage tester must go out.
  A80-0075
–  Connect voltage tester between the contacts -2- and -3- of the plug connection -A-.
The warning light in the voltage tester must light up.
–  Turn rotary switch for air distribution up to the stop in position “air distribution to front windscreen”.
The warning light in the switch as well as in the voltage tester must go out.
  Note
t  If no fault is found during this test: however the vehicle window panes steam up, check -fresh air- and re-circulating air flap for smooth operation or replace fresh air flap and re-circulating air flap control motor -VI54-.
t  If the function is N.O.K.:
–  Check wiring between -El59- and -VI54- for interruption and short-circuit.
–  Check voltage supply and earth connection to the switch -El59-.
–  Replace heater control.
  A80-0075

Remove and install footwell vent > < Removing and installing control motor of fresh air flap and re-circulating air flap V154