A4 Mk3
| Components not located in passenger compartment, group of components „3“ |
| 1 - | Coolant circulation pump -V50- (coolant pump -V36-) |
| q | Fitting location on vehicles with a 6-cyl. FSI engine → Chapter |
Note| t | -V50- (-V36-) is only fitted on vehicles with no „auxiliary heater“ as optional extra → Chapter. |
| t | On vehicles with a 6-cyl. TFSI engine may also be fitted with -V50- (-V36-) at this location depending on the vehicle model → Engine, mechanics; Rep. gr.19 |
| t | On these vehicles with „auxiliary heater“ as optional extra, the circulation pump -V55- assumes the function of -V50- (-V36-) → Auxiliary heater; Rep. gr.82 |
| t | Depending on the version of the air conditioner operating and display unit, Climatronic control unit -J255-, the coolant circulation pump -V50- may also be referred to as coolant pump -V36- in the guided fault-finding routine → "Guided fault-finding" function of vehicle diagnostic, testing and information system VAS 5051. |
| t | On vehicles with a 8-cyl. FSI engine are currently not provided with -V50- (introduction not yet finalised) → Engine, mechanics; Rep. gr.19 and → Electronic parts catalogue. |
| t | The design of the coolant circulation pump -V50- (coolant pump -V36-) and pump actuation differ depending on the vehicle model and production period. As of Model Year 2012 and depending on the engine, the pumps fitted as of the start of production and actuated by way of a 500 hertz signal (500 pulses per second) are gradually being replaced by pumps actuated by way of a 100 hertz signal. The pumps actuated by way of a 100 hertz signal additionally feature a diagnostic function and are generally actuated by way of the corresponding engine control unit. Attention is therefore to be paid to correct assignment (only the assigned pump can ever be actuated) → "Guided fault-finding" function of vehicle diagnostic, testing and information system VAS 5051, → Current flow diagrams, Electrical fault finding and Fitting locations and → Electronic parts catalogue. |
| 2 - | Coolant circulation pump -V50- (coolant pump -V36-) |
| q | Fitting location on vehicles with a 4-cyl. engine → Chapter |
Note| t | -V50- (-V36-) is only fitted on vehicles as of Model Year 2010 with a „start/stop system“ as optional extra but no „auxiliary heater“ optional extra → Chapter. |
| t | Vehicles with a „start/stop system“ and „auxiliary heater“ as optional extra have no -V50- (-V36-). On these vehicles, the circulation pump -V55- assumes the function of -V50- (-V36-) → Auxiliary heater; Rep. gr.82 |
| t | Depending on the version of the air conditioner operating and display unit, Climatronic control unit -J255-, the coolant circulation pump -V50- may also be referred to as coolant pump -V36- in the guided fault-finding routine → "Guided fault-finding" function of vehicle diagnostic, testing and information system VAS 5051. |
| t | The design of the coolant circulation pump -V50- (coolant pump -V36-) and pump actuation differ depending on the vehicle model and production period. As of Model Year 2012 and depending on the engine, the pumps fitted as of the start of production and actuated by way of a 500 hertz signal (500 pulses per second) are gradually being replaced by pumps actuated by way of a 100 hertz signal. The pumps actuated by way of a 100 hertz signal additionally feature a diagnostic function and are generally actuated by way of the corresponding engine control unit. Attention is therefore to be paid to correct assignment (only the assigned pump can ever be actuated) → "Guided fault-finding" function of vehicle diagnostic, testing and information system VAS 5051, → Current flow diagrams, Electrical fault finding and Fitting locations and → Electronic parts catalogue. |