A4 Mk3
Note
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| 1 - | Air intake box |
| q | Removing and installing → Chapter |
| q | Dismantling and assembling → Chapter |
| q | Different versions (with and without connection for glove compartment cooling) |
| q | Connection for glove compartment cooling at air intake box → Chapter |
Note| t | Air conditioning units with an additional connection for glove compartment cooling are being gradually introduced as of 01.2008. This connection is sealed with a plug on vehicles not featuring glove compartment cooling. |
| t | As of Model Year 2012 a modified version is gradually to be introduced. Pay attention to the notes on this component → Chapter „Components of air conditioning unit and air intake box with Basic type“ |
| 2 - | Air conditioning unit with evaporator („Deluxe“ version) |
| q | Only to be removed after draining the refrigerant circuit; the vehicle is to be taken to a workshop equipped with the necessary tools where the work can be performed by appropriately qualified personnel → Air conditioner with refrigerant R134a. |
| q | Removing and installing evaporator with air conditioning unit fitted (vehicles as of start of production up to Model Year 2012) → Chapter |
Note| As of Model Year 2012 a modified version is gradually to be introduced. Pay attention to the notes on this component → Chapter „Components of air conditioning unit and air intake box with Basic type“ |
| q | Removing and installing evaporator with evaporator housing → Chapter |
| q | Removing and installing air conditioning unit with evaporator → Chapter |
| q | Dismantling and assembling air conditioning unit → Chapter |
| q | Cleaning evaporator of air conditioner with ultrasonic A/C cleaner -VAS 6189- → Chapter |
| 3 - | Air recirculation flap control motor -V113- |
| q | Removing and installing → Chapter |
| 4 - | Air flow flap control motor -V71- |
| q | Removing and installing → Chapter |
| 5 - | Coolant pipes to heat exchanger |
| 6 - | Expansion valve |
| q | Detaching and attaching refrigerant lines → Chapter |
| q | Removing and installing → Chapter. |
Note| As of Model Year 2012 a modified version is gradually to be introduced. Pay attention to the notes on this component → Chapter „Components of air conditioning unit and air intake box with Basic type“ |
| 7 - | Grommet |
| q | For sealing opening for refrigerant lines through plenum chamber back wall |
| 8 - | Left temperature flap control motor -V158- |
| q | Removing and installing → Chapter |
| 9 - | Cover for refrigerant pipes to evaporator |
| q | Removing and installing → Chapter |
| 10 - | Left centre vent control motor -V110- |
| q | Removing and installing → Chapter |
| q | Removing and installing left mounting plate with control motors -V108- and -V110- → Chapter |
| q | Removing and installing left centre vent control motor -V110- → Chapter |
| 11 - | Defroster flap control motor -V107- |
| q | Removing and installing → Chapter |
| 12 - | Left footwell flap control motor -V108- |
| q | Removing and installing → Chapter |
| q | Removing and installing left mounting plate with control motors -V108- and -V110- → Chapter |
| 13 - | Connection for left (driver side) condensation drain |
| q | Checking condensation drain, removing and installing condensation drain hose → Chapter |
| 14 - | Rear temperature flap control motor -V137- |
| q | Removing and installing → Chapter |
| 15 - | Left footwell vent temperature sender -G261- |
| q | Removing and installing → Chapter |
| q | The left footwell vent temperature sender -G261- is installed in the left footwell vent |
| 16 - | Connection to air conditioner operating and display unit, Climatronic control unit -J255- at air conditioning unit wiring harness |
| 17 - | Right footwell vent temperature sender -G262- |
| q | Removing and installing → Chapter |
| q | The right footwell vent temperature sender -G262- is installed in the right footwell vent. |
| 18 - | Fresh air blower control unit -J126- |
| q | Removing and installing → Chapter |
| q | Checking → "Guided fault-finding" function of vehicle diagnostic, testing and information system VAS 5051 |
Note| t | Different versions → Chapter |
| t | In Model Year 2010, petrol engines designed for operation with bioethanol are being gradually introduced (Flex Fuel Vehicle). These engines are currently also fitted with a supplementary air heater element -Z35- → Chapter. |
| t | Vehicles with a high-voltage system (hybrid vehicles) and petrol engine are currently also fitted with a supplementary air heater element -Z35- → Chapter. |
| t | On vehicles with a petrol engine, the electric supplementary heating (supplementary air heater element -Z35-) is actuated by a signal from the operating and display unit, Climatronic control unit -J255- by way of the local data bus (via the same output by which the fresh air blower control unit -J126- is actuated) to the supplementary air heater control unit -J604-. In the event of problems with the fresh air blower control unit -J126- or the fresh air blower -V2- on these vehicles, also check the supplementary air heater control unit -J604- → "Guided fault-finding" function of vehicle diagnostic, testing and information system VAS 5051 and → Current flow diagrams, Electrical fault finding and Fitting locations. |
| t | Checking operation of supplementary air heater element -Z35- → Chapter. |
| t | As of Model Year 2012 a modified version is gradually to be introduced. Pay attention to the notes on this component → Chapter „Components of air conditioning unit and air intake box with Basic type“ |
| 19 - | Evaporator |
| q | Removing and installing air conditioning unit with evaporator → Chapter |
| q | Removing and installing evaporator with air conditioning unit fitted (vehicles as of start of production up to Model Year 2012) → Chapter |
Note| As of Model Year 2012 a modified version is gradually to be introduced. Pay attention to the notes on this component → Chapter „Components of air conditioning unit and air intake box with Basic type“ |
| q | Removing and installing evaporator with evaporator housing → Chapter |
| 20 - | Connection for right (front passenger side) condensation drain |
| q | Checking condensation drain, removing and installing condensation drain hose → Chapter |
| 21 - | Heating system heat exchanger |
| q | Removing and installing heat exchanger with air conditioning unit fitted → Chapter |
| 22 - | Supplementary air heater element -Z35- / honeycomb element |
| The supplementary air heater element -Z35- is fitted on vehicles with a diesel engine and vehicles with certain petrol engines → Chapter. |
| Vehicles with a petrol engine (with no supplementary air heater element -Z35-) are fitted with a honeycomb element as spacer element in the unused space (this ensures identical flow conditions in the air conditioning unit with and without the supplementary air heater element -Z35-). |
| q | If, on vehicles with a diesel engine, an auxiliary heater fitted as optional extra is actuated as supplementary heater, there is no supplementary air heater element -Z35- but rather only a honeycomb element (introduction not yet finalised) → Chapter. |
| q | Checking operation of supplementary air heater element -Z35- → Chapter. |
| q | Removing and installing supplementary air heater element -Z35- / honeycomb element with air conditioning unit in position → Chapter |
Note| t | In Model Year 2009, a modified version of the supplementary air heater element -Z35- (slightly slimmer heating element design) was gradually introduced. Pay attention the correct version and assignment → Electronic parts catalogue. |
| t | In Model Year 2010, petrol engines designed for operation with bioethanol are being gradually introduced (Flex Fuel Vehicle). These engines are currently also fitted with a supplementary air heater element -Z35- → Chapter. |
| t | Vehicles with a high-voltage system (hybrid vehicles) and petrol engine are currently also fitted with a supplementary air heater element -Z35- → Chapter. |
| 23 - | Right temperature flap control motor -V159- |
| q | Removing and installing → Chapter |
| 24 - | Right centre vent control motor -V111- |
| q | Removing and installing → Chapter |
| q | Removing and installing right mounting plate with control motors -V109- and -V111- → Chapter |
| 25 - | Right footwell flap control motor -V109- |
| q | Removing and installing → Chapter |
| q | Removing and installing right mounting plate with control motors -V109- and -V111- → Chapter |
| 26 - | Fresh air blower -V2- |
| q | Removing and installing → Chapter |
| q | Checking → "Guided fault-finding" function of vehicle diagnostic, testing and information system VAS 5051 |
Note| t | Different versions → Chapter |
| t | As of Model Year 2012 a modified version is gradually to be introduced. Pay attention to the notes on this component → Chapter „Components of air conditioning unit and air intake box with Basic type“ |
| 27 - | Dust and pollen filter |
| q | Removing and installing → Chapter |
| q | Heed replacement intervals → Maintenance tables |
| q | Different versions with and without activated charcoal filter element → Chapter |
| 28 - | Evaporator output temperature sender -G263- |
| q | Removing and installing → Chapter |