Removing and installing air recirculation flap 1 control motor for hybrid battery V479 — AUDI

🧭 Before you start

Fits: Audi A8 D4 (4H, 2010–2017)

📋 Procedure

1. Switch off ignition. [Note: De-energising high-voltage system:Connect vehicle diagnostic testerSelect Guided Fault Finding modeUsing the Go to key, select the following menu items in successionFunction/component selectionBodyElectrical systemSelf-diagnosis compatible systems8C - Hybrid battery management -J8408C - Hybrid battery management, functions51 - De-energise high-voltage system (Rep. gr. 93)] [Note: On this vehicle, the two control motors (V479 and V480) at the battery cooling module are activated by the battery regulation control unit J840 via a data line. The two control motors are connected by way of this data line (LIN bus) to J840. If an incorrect control motor has been fitted, if the control motors at the battery cooling module have been interchanged or if there is a fault at one of the control motors or in the wiring, this can result in different entries in the event memory with different types of fault in "“Guided Fault Finding”" mode and .The control motors at the battery cooling module are identical to those at the air conditioning unit. However, since J840 cannot perform addressing for the control motors, it is important to fit only control motors on the battery cooling module that already have the correct address. For this reason, take care to select the correct version (part number) on replacement and note the correct fitting location when installing in "“Guided Fault Finding”" mode and Electronic parts catalogue.Please note that different designations may be used for the control motors V479 and V480 in vehicle diagnosis.] [Note: At the start of production, the part number of V479 for example is "“8R0 820 504”" and that of V480 is "“8R0 820 510”". Take care to select the correct version Electronic parts catalogue.]
2. ⚠ Pay attention to correct assignment of the control motors.The two control motors (V479 and V480) are identical. The only difference is the assignment stored in the electronics (address).If the control motors are interchanged on installation, activation of the flaps in the battery cooling module will be incorrect and problems with the drive battery A2 will be encountered due to incorrect air routing.Prior to removal, mark the control motor and the fitting location at the battery cooling module.On installation, pay attention to the marking and check the part number of the control motor if necessary Electronic parts catalogue. — Remove luggage compartment floor General body repairs, interior70Luggage compartment trim panels; Exploded view - luggage compartment floor.
3. Remove drive battery Electrical system, hybrid93High-voltage battery unit; Removing and installing high-voltage battery.
4. Remove air inlet duct for drive battery .
5. Unplug electrical connector (1).

6. Remove bolts (arrows) and detach air recirculation flap 1 control motor for hybrid battery V479.
7. Re-install remaining components (removed earlier).
8. ⚠ High voltage can cause fatal injury. Danger of severe or fatal injuries from electric shock. The high-voltage system may only be re-energised by a suitably qualified person (Audi high-voltage technician). The system may only be re-energised using the vehicle diagnostic tester via "“Guided Fault Finding”". The vehicle is then made ready for operation again by the qualified person (Audi high-voltage technician).The qualified person (Audi high-voltage technician) marks the vehicle by attaching the appropriate warning signs. — Switch on ignition.
9. After installation, interrogate event memory of operating and display unit (Climatronic control unit J255) and battery regulation control unit J840 and erase any faults displayed in "“Guided Fault Finding”" mode.
10. To check function after installation (if necessary) perform final control diagnosis of both control motors on battery cooling module via battery regulation control unit J840 in "“Guided Fault Finding”" mode.

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