S8 Quattro Sedan V8-4.2L (AYS) (2002)
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Wait a short period of time.
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Read display from display field 4.
Read Measuring Value Block 1
->
0 12.5 V 12.5 V 00
Specified Values: "00" (no requirement for "recirculating air, A/C in fresh air mode) or "60" (partial recirculating mode)
Depending on the composition of the windshield washer fluid, the sensor can determine impurities in the air and request for "Automatic air
recirculation."
If when activating the wiped washer system the mode does not switch over to recirculating air, check the wiring connection between A/C control head
-E87- and wiped washer intermittent relay -J31- according to the wiring diagram.
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Press -> button.
Indicated on display
Rapid data transfer
HELP
Select function XX
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Push buttons -0- and -6- to select "End Output" function 06.
Indicated on display
Rapid data transfer
Q
06 - End Output
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Press -Q- button to confirm input.
Indicated on display
Rapid data transfer
HELP
Insert address word XX
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Switch ignition off and disconnect Data Link Connector (DLC).
If the function of the sensor for air quality -G238- is OK for this test and there is a customer complaint continue as follows:
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Check dust and pollen filter for dirt.
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Close DTC unit and select "Read Measuring Value Block" function 08.
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Drive vehicle to area with relatively clean recirculating air (the system works in fresh air mode).
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Now drive vehicle into an area with heavily polluted recirculating air (e.g. on a street with construction or and truck traffic).
Display field 4, display group 001 must change from 00 or 60 to 10 when driving through a diesel exhaust cloud.