A4 V6-3.0L (AVK) (2004)
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Read value indicated in display field -4-.
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Specification: 30: (Request for "Recirculated air" mode due to washer/wiper system, A/C switches for approx. 10 seconds to the recirculated
air mode)
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Wait a short period time.
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Read value indicated in display field -4-.
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Specification: 00: (no request for "Recirculated air mode", air conditioning in fresh air mode)
or
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Specification: 60 (Partial recirculated air mode)
NOTE:
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Depending on the composition of the windshield washer fluid, the sensor can determine impurities in the air and request for "Automatic air
recirculation".
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When activating the wiper/washer system and the system does not change-over to recirculated air mode, check function of Wiper/Washer
Intermittent Relay -J31- (the information "windshield washing" is received from the Steering Column Electronic Systems Control Module -J527-
via the CAN-bus comfort system ) (See Read Measuring Value Block, display group 018).
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If the functions 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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Connect VAS 5051 and select "Read measuring value block" function 08.
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A second technician is required because the indicated values must be read out in the vehicle interior.
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Enter display group number "014".
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Drive vehicle to area with relatively clean ambient air (system operates in fresh air mode).
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Now drive vehicle into an area with heavily polluted recirculated air (e.g. on a street construction or truck traffic).
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Read indications shown in display fields -3- and -4-. Display fields -3- and -4- must change when driving through a diesel exhaust cloud
(meaning: see Read Measuring Value Block display group 014). See: Testing and Inspection/Scan Tool Testing and Procedures/Measuring
Value Blocks (Function 08)