Removing and installing air distribution flap control motor V428 — AUDI

🧭 Before you start

Fits: Audi A4 B9 (8W, 2015–)

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• Mark the connector (C) (to prevent interchange if several connectors are simultaneously unplugged).
• The mount of the control motor has no stop. It rotates permanently if the control motor is actuated. A detached control motor should therefore not be actuated.
• Turning the mount (D) of the control motor (B) by hand may damage the electronics in the control motor. — Check the shaft (E) and the mount (D) of the control motor (B). They must be properly aligned for assembly.
• Check the connection between the control motor mount and the shaft. There must not be any play.

📋 Procedure

1. Move the front passenger seat to the rearmost position.
2. Switch off the ignition.
3. Remove the glove box General body repairs, interior68Shelves/storage compartments/covers; Removing and installing glove box.
4. Remove the right footwell vent (front passenger side) . [Note: On right-hand drive vehicles, move the driver's seat to the rearmost position and remove the driver side dash panel trim General body repairs, interior68Shelves/storage compartments/covers; Removing and installing driver side dash panel trim.] [Note: There are different versions of these control motors (with an open shaft (2) or with a closed shaft (4))Distinguishing features of different makes of control motor.On a control motor (1) with an open mount for the shaft (2), the control motor can be pressed off the shaft. Particular care must be taken when detaching a control motor (3) with a closed shaft (4) from the shaft of the connecting element to avoid damaging this.] [Note: The following illustrations show removal and installation for a control motor with an open shaft (2).]
5. ⚠ Risk of damaging shafts or connecting elements on removing a control motor with closed shaft (4)On a control motor with closed shaft (4), the connecting element cannot be pressed out of the control motor shaft mount.Take great care when detaching a control motor with closed shaft (4). In particular make sure that the connecting elements do not work loose from their mounts at the heater and air conditioning unit or at the applicable holder. — Unfasten the air duct above the central tube and press outwards as far as possible. To do so, remove the dash panel vent air duct .

6. If fitted, remove the air duct for glove box cooling .
7. Mark the connector (C) (to prevent interchange if several connectors are simultaneously unplugged).
8. Screw out the bolts (A).
9. Detach the control motor (B) from the shaft (E) of the cam plate.
10. Unplug the connector (C). [Note: The mount of the control motor has no stop. It rotates permanently if the control motor is actuated. A detached control motor should therefore not be actuated.]
11. ⚠ Turning the mount (D) of the control motor (B) by hand may damage the electronics in the control motor. — Check the shaft (E) and the mount (D) of the control motor (B). They must be properly aligned for assembly.
12. Attach the mount (D) of the control motor to the shaft (E) of the cam plate. [Note: Check the connection between the control motor mount and the shaft. There must not be any play.]
13. Plug in the connector (C).
14. Tighten the bolts (A).
15. Lay the wiring harness to the connector (C) such that it cannot come into contact with moving components.
16. Perform basic setting and final control diagnosis for the air conditioner "“Guided fault-finding”" mode. [Note: The control motors on this vehicle are equipped with electronics. A new control motor only learns its position at the heater and air conditioning unit in the course of basic setting and can then be actuated by the front air conditioner operating and display unit E87 (all control motors are identical at present) "“Guided fault-finding”" mode.During basic setting, the control motors are assigned and adapted in accordance with the series connection of the wiring. If the sequence is not as specified, the matching of the control motors and thus flap control will not be correct Overview of control motors of air conditioner.]
17. Interrogate the event memory of E87 and erase any faults displayed "“Guided fault-finding”" mode.

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