A4 Mk3
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| 1 - | Radiator fan -V7- and radiator fan 2 -V177- |
| q | For notes, refer to → Chapter „Components not located in passenger compartment (all models)“ |
| 2 - | Ambient temperature sensor -G17- |
| q | For notes, refer to → Chapter „Components not located in passenger compartment (all models)“ |
| 3 - | Label |
| q | Indicates type of refrigerant and specified capacity → Air conditioner with refrigerant R134a |
| 4 - | Fresh air intake with intake grille |
| q | For notes, refer to → Chapter „Components not located in passenger compartment (all models)“ |
| 5 - | Air quality sensor -G238- / humidity sender in fresh air intake duct -G657- |
| q | For notes, refer to → Chapter „Components not located in passenger compartment (all models)“ |
| 6 - | Condensation drain |
| q | For notes, refer to → Chapter „Components not located in passenger compartment (all models)“ |
| 7 - | Plenum chamber water drain |
| q | For notes, refer to → Chapter „Components not located in passenger compartment (all models)“ |
| 8 - | Power and control electronics for electric drive -JX1- |
| q | For all work on the power and control electronics for electric drive -JX1- and on vehicles with a high-voltage system, pay attention to the additional warnings for such vehicles → Chapter and → Electrical system; Rep. gr.93 |
| 9 - | Coolant switching valve / Climatronic coolant shut-off valve -N422- |
| q | For notes, refer to → Chapter „Components not located in passenger compartment (all models)“ |
| 10 - | Plenum chamber water drain |
| q | For notes, refer to → Chapter „Components not located in passenger compartment (all models)“ |
| 11 - | Coolant circulation pump -V50- |
| q | For notes, refer to → Chapter „Components not located in passenger compartment (all models)“ |
| 12 - | Connections of refrigerant lines to evaporator in battery cooling module |
WARNING
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| 13 - | Refrigerant shut-off valve 1 for hybrid battery -N516- |
| q | Fitted in area of left suspension strut dome in engine compartment |
| q | Checking → "Guided fault-finding" function of vehicle diagnostic tester |
Note| -N516- is actuated, for example, if the battery needs to be cooled but the air conditioner is not set to cooling mode for the passenger compartment (valve open without activation). |
| q | Removing and installing → Chapter |
| 14 - | Electrically driven air conditioner compressor |
| q | With control unit for air conditioning compressor -J842- and electrical air conditioner compressor -V470- |
| q | Detaching air conditioner compressor from holder/re-attaching on vehicles with a 4-cyl. engine → Chapter1) |
Note| t | The type of compressor may differ depending on the production period and engine. → Electronic parts catalogue |
| t | Not all replacement air conditioner compressors have the same oil capacity. Attention is therefore to be paid to the quantity of oil in the air conditioner compressor and the exact part number → Electronic parts catalogue and → Air conditioner with refrigerant R134a. |
| t | There may be different refrigeration oil capacities for the refrigerant circuit depending on the type of air conditioner compressor. The reason for the different oil quantities in the air conditioner compressor for an otherwise identical refrigerant circuit is the design of the actual air conditioner compressor. Attention is to be paid to these oil quantities. Too much oil in the refrigerant circuit results in higher pressures and a reduction in the cooling output of the air conditioner. Lubrication problems may be encountered in the air conditioner compressor if there is insufficient oil → Air conditioner with refrigerant R134a. |
| t | When fitting refrigerant lines and the corresponding holders, pay attention to adequate clearance from other components (such as belts and engine pulleys). |