Air Flow Door Motor (V71)
Air Flow Door Motor (V71)
• After the new motor is installed, make sure the Climatronic control module (J255) activates the motor and that the motor is working correctly (the recirculation and fresh air doors are in the correct position). Refer to Vehicle diagnosis, testing and information system (VAS5051B) in the "Guided Fault Finding" function.
• Air Flow Door Motor can only be removed without difficulty in "fresh air mode stop" and installed only in this position. If the motor stops in a different position and can no longer be moved electrically into the "fresh air mode stop", replace it.
Removing
- Remove the glove compartment.
- If necessary, switch on the ignition on and select "Defrost" on the Climatronic control module, and (press the Defrost button; the indicator lamp inside the "Defrost" button will illuminate).
• In the "Defrost" operating mode, the positioning motor is always placed in the "Fresh air operation" position.
- Wait until the motor reaches it end position "fresh air operation" (approximately 20 seconds).
- Switch off ignition.
- Disengage catches - D - and - E - for bracket - A - on intake housing and remove bracket - A -.
- Remove Recirculation Door Motor (V113). Refer to=> [ Recirculation Door Motor (V113) ] Recirculation Door Motor (V113).
- Mark connector to Recirculation Door Motor (to prevent interchange with connector to Air Flow Door Motor (V71) ).
- Remove Air Flow Door Motor - A - from air intake shroud.
- Mark connector to Air Flow Door Motor and remove it.
• The connection between the airflow door motor gears and the gears on the back pressure door is designed so the airflow door motor can be removed easily only in the "fresh air operation" position.
• If motor is found in a different position and can no longer be moved, motor cannot be simply pulled off, rather it must be loosened first with great force from mounting points - B -, ensure that toothed gear - C - is not damaged when doing this.
Installing
• The airflow door motor is delivered as a replacement part in "fresh air operation" position. It can only be placed on the back pressure door toothed gear when toothed gear - A - contacts stop - B -. If an airflow door motor was removed in a different position or activated in the removed state, it cannot be installed.
• If the gear - A - on the airflow door motor is not in - B - "fresh air operation", then connect motor via accompanying connector to the vehicle wiring harness. Then switch on ignition and select "Defrost" operating mode on the Climatronic control module (J255) A/C (heater) control head (positioning motor moves to "fresh air operation" stop - B -).
• If positioning motor terminals 5 and 6 are connected to via a 5 A fuse to a 12 volt battery, e.g. with an adapter cable => [ Adapter Cable for Activating Control Motors ] Adapter Cable for Activating Control Motors or line from the Connector Test Kit (V.A.G 1594 C) , it moves to stop in one direction. The direction of rotation is changed by exchanging the "positive" and "negative".
- Activate the motor until the toothed gear - A - reaches stop "fresh air mode" - B -.
- Switch off ignition if necessary.
- Before installing control motor, check back pressure door bearing in air intake shroud and position of toothed gear - C - (back pressure door is open, fresh air mode).
- Connect airflow door motor (V71) to vehicle wiring harness (make sure connectors are allocated correctly).
- Open the air recirculation door - E -.
- Reach into intake opening for recirculating air mode and bring air flow door - A - into "fresh air mode" position (intake opening for recirculating air mode is closed).
- Insert airflow door motor - B - opposite direction of arrow in mounts - C - and on toothed gear - D -.
- So that toothed gear on motor - A - can be slid on toothed gear of air flow door, short tooth - C - of motor toothed gear must align with short tooth interval - D - of toothed gear on shaft of air flow door - B -.
- Install Recirculation Door Motor (V113). Refer to=> [ Recirculation Door Motor (V113) ] Recirculation Door Motor (V113).
- Install the wiring harness so that it cannot come in contact with any moving parts (e.g. the actuating arm of the control motor).
- Install the bracket - A -, make sure the guides on the bracket - B - are inserted correctly into the intake housing mount - C - and that the bracket is engaged correctly in both catches - D - and - E -.
- Check both motors, it must be held in its position by bracket - A -, if it is not installed free of play, use some foam to rectify play if necessary, attaching it to inside of mounting points - F - of bracket - A -.
• The position of the airflow door motor and of the recirculation door motor (V113) is no longer visible when the glove compartment is installed. Make sure they are working correctly before installing the glove compartment.
• If both toothed gears (on airflow door motor (V71) and air flow door) assembled in the incorrect position, air flow door will not reach its two end positions (may be detected as a malfunction via "Basic Setting" function) or motor does not run cleanly and without hitching.
- Switch ignition on.
- Check A/C control head DTC memory and delete any malfunctions shown using Vehicle diagnosis, testing and information system (VAS5051B) in the "Guided Fault Finding" function.
- Perform a basic setting on the A/C and then check the A/C DTC memory one more time. Refer to Vehicle diagnosis, testing and information system (VAS5051B) in the "Guided Fault Finding" function.
- Activate Airflow door motor (V71) and recirculation door motor via Climatronic control module (J255) as follows until toothed gear reaches stop "recirculating air mode" (this illustration depicts air flow door - A - at stop for "fresh air mode") and then check position of air flow door, it must be closed.
- Next, select "Recirculation mode" function on Climatronic control module.
Recirculation door motor opens door - E - and Airflow door motor (V71) sets air flow door - A - into position "air intake opening for recirculating air mode open".
Wait until both motors have reached their end positions.
- Select "Defrost" operating mode on Climatronic control module (J255) (press Defrost button, indicator light in Defrost button lights up; positioning motors are always placed in "fresh air mode" position in this operating mode).
Airflow door motor sets air flow door - A - into "air intake opening for recirculating air mode closed" position, Recirculation door Motor (V113) sets door - E - into a position specified by Climatronic control module.
Wait until both motors have reached their end positions.
Install all remaining removed components in reversed order.