weird cabin noise

[quozl]

The code thrown is:
01274 - Air Flow Flap Positioning Motor (V71)

This seems to happen randomly on MkIVs and B5 Passats with climatronic. Apparently it's due to the flap sticking after recirculation mode is turned on.

The Bentley Manual says this about it:
Short circuit or open circuit in wiring or connectors to air flow flap motor -V71-
- Check -V71- using function 08 Read measuring value block
- Repair wiring and connectors using wiring diagram

To fix this with Vag-Com:
Log into vag-com, open module 08 (HVAC).
Follow the adjustments ValveFloat outlined here, involving block 002.
Allow vag-com to calibrate the flap, ticking should be gone.

If that fails and you have to replace the physical motor:
The part number is 1J1 907 511 A, costs around $120. Here's the Bentley blurb for it:

- Remove glove box.
- With screwdriver, carefully unclip air flow flap rod from lever.
- Disconnect electrical connector.
- Remove screw.
The flap motor is connected to the evaporator housing portion of the heating and A/C unit. To prevent damage:
- Lower flap motor and at the same time pull off fresh air/recirculating air flap shaft.

Replacement flap motors are supplied in the "recirculating air" position. To ease the installation, first do the following:
- Connect electrical connector to flap motor.
- Switch on ignition.
- Operate button for fresh air/recirculating air.
When the center position has been reached:
- Disconnect electrical connector from flap motor.
- Insert flap motor in fresh air/recirculating air shaft.
If the flap motor cannot be attached to the fresh air/recirculating air flap shaft, remove fresh air blower -V2-, and attach flap by hand.
- Turn flap motor and tighten bolts.
- Attach operating rod for air flow flap.
- Initiate Basic setting, function 04, Climatronic, OBD.

reproduced from VWVORTEX

Cheers Al

[dubbed]

Good info, Al. Although I'd think the installation would be different to RHD v-dubs.

[quozl]

As far as I'm aware they are in the same position but I imagine one of our esteemed VW trained techs can tell us one way or the other.

Cheers Al

[goodfella]

update.. I ran the aircon... set it to recirc, then off again.

Now noise isnt there, maybe the flap worked loose?!!

[JustCruisn]

Thanks Al

Yes V71 ,Air flow flap motor, thats the one I've been investigating.
I priced that part yesterday 1J1 907 511 A - $251.96 (Brisbane, Highway VW)
Where did you get the $120 quote ??

I've read that stuff on the tex, and other sites in German, and found the steps in my Bentley. I've got a draft DIY which I will finish off when I get to do my car for real.

I'm expecting that the real fix will require a correction to the flap, or the actuator arms that control it. I'm fairly sure the motor is going to be OK, we know it is trying but is likely to be backing off due to something binding.

I think the worst thing would be to go in and try to fix V71 and find that the problem is on another motor, like V70 Central air flap motor.

So having a vagcom reading to confirm the correct part could save some effort.

[dubbed]

I'm relying on your brother ^^

[quozl]

Thanks Al

Yes V71 ,Air flow flap motor, thats the one I've been investigating.
I priced that part yesterday 1J1 907 511 A - $251.96 (Brisbane, Highway VW)
Where did you get the $120 quote ??

I've read that stuff on the tex, and other sites in German, and found the steps in my Bentley. I've got a draft DIY which I will finish off when I get to do my car for real.

I'm expecting that the real fix will require a correction to the flap, or the actuator arms that control it. I'm fairly sure the motor is going to be OK, we know it is trying but is likely to be backing off due to something binding.

I think the worst thing would be to go in and try to fix V71 and find that the problem is on another motor, like V70 Central air flap motor.

So having a vagcom reading to confirm the correct part could save some effort.

As I mentioned in the post it was a repost from VWVortex so that is the US price I would imagine mate. You can drop round here if you want a scan done I'm at Kedron and will be home most of the weekend. 0403 329 610

Cheers Al

[qsilverza]

Yeh I've had the same problem for ages. Mine does it for a while and than I think error's and it stops trying to find the home position. So I haven't really found a need to replace it as it stopped bugging me