audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

ABOUT US
Checking vent frame > < Removing and installing air quality sensor G238

A4 Cabriolet Mk2

Removing and installing
Removing and installing
–  Remove plenum chamber cover.
Version “1”
   
–  Unplug connector -A- from air quality sensor -G238-.
–  Screw out bolt -B- and detach air quality sensor -G238-.
  A87-0252
Contact assignment in connector -A-
1 - Positive (terminal “15”)
2 - Negative (terminal “31”)
3 - Signal wire to operating and display unit, Climatronic control unit -J255- (square-wave signal cannot be measured)
4 - Not used
Version “2”
  A87-0253
–  Unplug connector -A- from air quality sensor -G238-.
–  Release catch -B- and slide air quality sensor -G238--C- downwards.
Contact assignment in connector -A-
1 - Positive (terminal “15”)
2 - Negative (terminal “31”)
3 - Signal wire to operating and display unit, Climatronic control unit -J255- (square-wave signal cannot be measured)
  A87-0477

Checking vent frame > < Removing and installing air quality sensor G238