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VENTILATION SYSTEM Audi A4 B8

Air Conditioning (avant) 1 illustration ~1080 words

VENTILATION SYSTEM

Note. The following illustrations show the location of the components on an Audi A5 Coupe; an Audi A5 Sportback, Audi A4, etc., the location of the components varies slightly. The description of the components is not different; removing, installing and checking is performed in the same way as on the Audi A5 Coupe.

Scheme 365

Scheme 365: VENTILATION SYSTEM
Scheme 365: VENTILATION SYSTEM
  1. Defroster Vent/Front Window Removing and installing, refer to «Removal and Installation»(/audi/a4/b8-2007-2012/remont/exteriorinterior-trim/#interior-trim-avant) .
  2. Sunlight Photo Sensor -G107- Removing and installing, refer to «SUNLIGHT PHOTO SENSOR G107»(/audi/a4/b8-2007-2012/remont/automatic-hvac-system/#air-conditioning-avant__sunlight-photo-sensor-g107) and «Removal and Installation»(/audi/a4/b8-2007-2012/remont/exteriorinterior-trim/#interior-trim-avant) .
  3. Vents For Indirect Ventilation / Loud Speaker Cover, Instrument Panel, Center Removing and installing vent, refer to «Removal and Installation»(/audi/a4/b8-2007-2012/remont/exteriorinterior-trim/#interior-trim-avant) . The vent for indirect ventilation is only installed on vehicles equipped with the Comfort A/C system. On vehicles equipped with the Basis A/C system, the cover is installed and the opening for the A/C is sealed (different version of the A/C system and the air guide under the dash panel).
  4. A/C Unit With Evaporator And Add-On Components Different versions depending on the vehicle version and equipment level. Refer to «A/C UNIT AND AIR INTAKE HOUSING COMPONENTS»(/audi/a4/b8-2007-2012/remont/automatic-hvac-system/#air-conditioning-avant__ac-unit-and-air-intake-housing) and Electronic Parts Information. Air guide in air conditioner and in vehicle, refer to «AIR ROUTING AND DISTRIBUTION IN PASSENGER COMPARTMENT»(/audi/a4/b8-2007-2012/remont/automatic-hvac-system/#air-conditioning-avant__air-routing-and-distribution-in-passenger) . Heating & A/C unit components, refer to «A/C UNIT AND AIR INTAKE HOUSING COMPONENTS»(/audi/a4/b8-2007-2012/remont/automatic-hvac-system/#air-conditioning-avant__ac-unit-and-air-intake-housing) . Clean air conditioning system evaporator with Ultrasound A/C Cleaner VAS 6189A, refer to «A/C SYSTEM EVAPORATOR, CLEANING»(/audi/a4/b8-2007-2012/remont/automatic-hvac-system/#air-conditioning-avant__ac-system-evaporator-cleaning) . Heating and A/C unit, removing and installing, refer to «A/C UNIT»(/audi/a4/b8-2007-2012/remont/automatic-hvac-system/#air-conditioning-avant__ac-unit) . NOTE: From 01.2008, A/C units which have an additional connection for the glove compartment cooling are being installed. On vehicles without glove compartment cooling, this connection is sealed with a plug, refer to «GLOVE COMPARTMENT COOLING TO AIR INTAKE MANIFOLD CONNECTION»(/audi/a4/b8-2007-2012/remont/automatic-hvac-system/#air-conditioning-avant__glove-compartment-cooling-to-air-intake) .
  5. Left Center Instrument Panel Vent Removing and installing instrument panel vents, refer to «INSTRUMENT PANEL VENTS AND REAR VENTS»(/audi/a4/b8-2007-2012/remont/automatic-hvac-system/#air-conditioning-avant__instrument-panel-vents-and-rear-vents) and «Removal and Installation»(/audi/a4/b8-2007-2012/remont/exteriorinterior-trim/#interior-trim-avant) .
  6. Right Center Instrument Panel Vent Removing and installing instrument panel vents, refer to «INSTRUMENT PANEL VENTS AND REAR VENTS»(/audi/a4/b8-2007-2012/remont/automatic-hvac-system/#air-conditioning-avant__instrument-panel-vents-and-rear-vents) and «Removal and Installation»(/audi/a4/b8-2007-2012/remont/exteriorinterior-trim/#interior-trim-avant) .
  7. Defroster Vent/Right Side Window Removing and installing, refer to «Removal and Installation»(/audi/a4/b8-2007-2012/remont/exteriorinterior-trim/#interior-trim-avant) .
  8. Instrument Panel Vent, Right Removing and installing instrument panel vents, refer to «INSTRUMENT PANEL VENTS AND REAR VENTS»(/audi/a4/b8-2007-2012/remont/automatic-hvac-system/#air-conditioning-avant__instrument-panel-vents-and-rear-vents) and «Removal and Installation»(/audi/a4/b8-2007-2012/remont/exteriorinterior-trim/#interior-trim-avant) .
  9. Dust And Pollen Filter (With Or Without Activated Charcoal Filter Element) Follow the replacement intervals, refer to «Maintenance, Diagnosis»(/audi/a4/b8-2007-2012/remont/procedures/#how-to-diagnosis-the-maintenance-maintenance-intervals-avant) . Different versions depending on the vehicle version and equipment level, refer to Electronic Parts Information. -- On vehicles with the Basis A/C system without activated charcoal filter element. -- On vehicles with the Comfort A/C system with an activated charcoal filter element there is an Air Quality Sensor -G238- installed on these vehicles, refer to «DUST AND POLLEN FILTER WITH ACTIVATED CHARCOAL INSERT»(/audi/a4/b8-2007-2012/remont/automatic-hvac-system/#air-conditioning-avant__dust-and-pollen-filter-with-activated) . Removing and installing, refer to «DUST AND POLLEN FILTER»(/audi/a4/b8-2007-2012/remont/automatic-hvac-system/#air-conditioning-avant__dust-and-pollen-filter) .
  10. Right Front Upper Body Outlet Temperature Sensor -G386- Removing and installing, refer to «RIGHT FRONT UPPER BODY OUTLET G386»(/audi/a4/b8-2007-2012/remont/automatic-hvac-system/#air-conditioning-avant__right-front-upper-body-outlet-g386) . Installed only in the Comfort A/C system.
  11. Right Condensation Water Drain (Front Passenger Side) Checking, removing and installing, refer to «CONDENSATION WATER DRAIN HOSE»(/audi/a4/b8-2007-2012/remont/automatic-hvac-system/#air-conditioning-avant__condensation-water-drain-hose) .
  12. Right Seat (Passenger Seat) With Seat Heating And Seat Ventilation Components Seat heating components (Right Front Seat Temperature Sensor -G345-, Right Front Heated Seat -Z46-) and seat ventilation (control unit and blowers), refer to «Seat Frames»(/audi/a4/b8-2007-2012/remont/seats/#seat-frames-avant) and «Seat Upholstery, Covers»(/audi/a4/b8-2007-2012/remont/seats/#seat-upholstery-covers-avant) Seat heater and seat ventilation are not installed in all vehicles (optional equipment). The Climatronic Control Unit -J255- adjusts the seat heating and seat ventilation. Activation of seat heater and seat ventilation are displayed in measured value block of front the Climatronic Control Module. Check using Vehicle Diagnosis, Testing and Information System VAS 5051 in "Guided Fault Finding" function. Different control units activate the seat heating the seat ventilation, depending on the vehicle equipment and version. Refer to «FRONT SEAT HEATING AND VENTILATION, CHECKING»(/audi/a4/b8-2007-2012/remont/automatic-hvac-system/#air-conditioning-avant__front-seat-heating-and-ventilation-checking) Wiring Diagram and Vehicle Diagnosis, Testing and Information System VAS 5051 in "Guided Fault Finding" function (for the Vehicle Electrical System Control Module Vehicle Electrical System Control Module -J519-, the Memory Seat/Steering Column Adjustment Control Module -J136- and the Passenger Memory Seat Control Module -J521-, depending on the vehicle). Repairing the seat heating and the seat ventilation, refer to «Removal and Installation»(/audi/a4/b8-2007-2012/remont/seats/#seat-frames-avant) and «Removal and Installation»(/audi/a4/b8-2007-2012/remont/seats/#seat-upholstery-covers-avant) . For information about seat heating and ventilation, refer to «FRONT SEAT HEATING AND VENTILATION, CHECKING»(/audi/a4/b8-2007-2012/remont/automatic-hvac-system/#air-conditioning-avant__front-seat-heating-and-ventilation-checking) NOTE: If there is a condition, where the heating or ventilation of the driver of passenger seat cannot be switched on, this will be stored as a malfunction in the Vehicle Electrical System Control Module -J519-, in the Memory Seat/Steering Column Adjustment Control Module -J136- or in Passenger Memory Seat Control Module -J521- (depending on the vehicle type and the vehicle equipment level). Currently no information is sent to the Climatronic control module -J255- via the data bus system; the DTC memory must be read out in each control unit or in the Comfort System Central Control Module -J393- using the Vehicle Diagnosis, Testing and Information System VAS 5051 under "Guided Fault Finding". If there is a complaint about seat heating or seat ventilation, first check the control unit DTC, which controls the seat heating and seat ventilation. The seat heating and ventilation is adjusted by the Climatronic control module; the adjustment is transmitted to the vehicle electrical system control module via the data bus. The specified temperatures for the different seat heating and seat ventilation settings are stored in the vehicle electrical system control module. Depending on the version of the vehicle electrical system control module and on the vehicle build date, the specified temperature for the seat heating and ventilation can be different with the same setting on the Climatronic control module. Check using Vehicle Diagnosis, Testing and Information System VAS 5051 under "Guided Fault Finding" (for the vehicle electrical system control module).
  13. Vent In Center Console, Rear Removing and installing, refer to «INSTRUMENT PANEL VENTS AND REAR VENTS»(/audi/a4/b8-2007-2012/remont/automatic-hvac-system/#air-conditioning-avant__instrument-panel-vents-and-rear-vents) and «Removal and Installation»(/audi/a4/b8-2007-2012/remont/exteriorinterior-trim/#interior-trim-avant) . -- Installed only on the Comfort A/C system (on the Basis A/C system, the opening in the center console is sealed).
  14. Rear Temperature Selection Potentiometer -G538- -- Installed only on the Comfort A/C system (on the Basis A/C system, the opening in the center console is sealed). The rear temperature selection potentiometer is part of the vent; cannot be replaced separately. Refer to Electronic Parts Information. Removing and installing, refer to «Removal and Installation»(/audi/a4/b8-2007-2012/remont/exteriorinterior-trim/#interior-trim-avant) . Check using Vehicle Diagnosis, Testing and Information System VAS 5051 in "Guided Fault Finding" function.