Door Motors

Air Flow Door Motor with Position Sensor

Special tools, testers and auxiliary items required

• Release Tool (T40072)

• If the malfunction "Upper or lower threshold exceeded" is present, check the motor/door connecting piece. It must be installed on the correct side of the motor and there must not be any play between the control motor mount and the connecting piece.

• Various identical electrical connectors are installed in the air intake unit. mark the electrical connectors before disconnecting them (they could become mixed up).

• Various control motors are installed on the A/C unit and in the air intake unit. They have different electrical values and are different in the part number index. Mark the control motors before removing them (so they are not switched).

Removing

- Switch off ignition.

- Remove the air intake unit, refer to => [ Air Intake Unit ] Air Intake Unit.

- Remove the air intake unit upper cover, refer to => [ Air Intake Unit Upper Cover ] Air Intake Unit Upper Cover.

- Remove bolts - A -.





- Disconnect the electrical connector - B - on the Air Flow Door Motor (V71) - C -.

- Remove the air flow door motor.

- If the connecting piece - B - will be removed, insert the (T40072) - A - in the piece.





- Loosen the retainers - E - on the connecting piece - B - by turning the thumb-wheel on the (T40072) - A -.

- Carefully pry off the connecting element - B -.

• The lever - C - is constructed differently than the connecting piece - B - so it cannot be removed with the (T40072) (pry it out with a screwdriver if necessary).

Installing





To installed, perform the steps done during removal in reverse order. Note the following:

- Check the position of the mount - B - on the control motor shaft. It must be in the position shown.

• Only install the connecting element - A - in the position shown where it engages without forcing it in. If the connecting element can only be installed with force, check if the mount - B - on the control motor shaft is turned 180°.

• If the mount - B - on the control motor shaft is not in the position shown, connect the control motor terminals 5 and 6 via a 5 A fuse to a 12V battery using an adapter cable, refer to => [ Adapter Cable for Activating Control Motors ] Adapter Cable For Activating Control Motors or line from the Connector Test Set (V.A.G 1594C).

• Let the control motor turn until the mount - B - is in the position shown and the connecting element - A - can be installed without force. The direction of rotation can be reversed by switch the plus and minus.

• The control motor shaft does not have a stop. It rotates continuously when voltage is applied to terminals 5 and 6.

- Before installing the control motor, check the back pressure/fresh air door mount.

- Install the connecting element - A - on the back pressure/fresh air door shaft if it was removed.

- Install the air flow door motor - C -.





- Make sure the connecting element - D - is seated correctly. There must not be any play between the control motor mount - E - and the connecting piece (remove the connecting piece if necessary).

- Tighten the bolts - A - by hand (10 Ncm).

- Connect the electrical connector - B - on the control motor - C -.

- Before installing the air intake unit upper cover, make sure the connector - B - is seated correctly and the wiring harness is routed correctly.

- Install the air intake unit, refer to => [ Air Intake Unit ] Air Intake Unit.

After finishing the repairs, perform the following work on the Climatronic Control Module (J255) using Vehicle diagnosis, testing and information system VAS 5051/ in the "Guided Fault Finding" function:

- Check the DTC memory and erase any malfunctions shown.

- Perform the basic setting.

- Perform the output diagnostic test mode.