New here. Having v40 sunroof calibration issues

nnamssorxela · Post by **nnamssorxela** » 30 Aug 2010, 15:36

Hello! I'm new around these parts, and while I don't personally own a volvo, lots of my family and friends do, so I get to work on all of them. This one particular problem is giving me a lot of trouble, and this will be the 3rd forum I've posted in looking for help (the other 2 have yielded no results as of yet).

Long story short, I broke the sunroof on my mom's volvo v40 and bought a replacement assembly (the whole deal; motor, glass, and the tracks etc.) The roof worked fine before, and now that the new one is in, I'm having calibration problems.

Before the roof had 4 major positions: vent (propped in back), closed, open almost all the way (~4in left to go), and then open all the way. Say the roof was in the vent position, from what I recall, I could hold the switch to the open position for as long as I wanted, and all it would do is close the roof. This was the same for all of the positions. If it was closed and I held the open switch it would move to the next position (open almost all the way) and it would never move to the next position until I released the button and pressed it again. This was true for all positions if I recall correctly. I suppose I could call them presets.

Now the roof has no presets, and wont stop in any of the old positions. For instance if the roof is slid all the way back, and I try to close it, it will keep going until it is in vent position with the back propped, and in order to close it I have to fiddle with the switch going back and forth while looking at the top of the roof to make sure it seated correctly, and that is only possible because the switch is not screwed to the car yet. The only thing I see controlling this is that little black box that the two connectors plug into which tucks up to the right of the motor and switch. It has no buttons that I see, but it does have a slightly exposed plastic gear looking knob.

For what it's worth, I have tried the original box, as well as the new one and had the same results.

Any help is greatly appreciated. And if I need to supply more information let me know.

Thank you for your time,
-Alex

Post by **billofdurham** » 31 Aug 2010, 11:16

Welcome to Matthew's Volvo Site.

The only thing I can think of is the control unit may be out of alignment.

VADIS instruction is attached:

V40 sunroof control unit.pdf: (44.68 KiB) Downloaded 555 times

Bill.

nnamssorxela · Post by **nnamssorxela** » 01 Sep 2010, 10:58

Good sir Bill of durham!

I appreciate your input very much!! I will try that once I get my hands on the volvo again. Until then I'll tell its owner not to tamper with the roof.

-Alex

nnamssorxela · Post by **nnamssorxela** » 02 Oct 2010, 15:02

I have just now got around to trying to recalibrate the sunroof (in town for the weekend). I must be doing something wrong because I'm having zero luck. Any pointers? The white dots on the 2 gears are lined up and the sunroof still doesn't have the presets like it used to.

-Alex

nnamssorxela · Post by **nnamssorxela** » 05 Jan 2011, 08:10

The sunroof calibrated itself. No idea how or why but it is fixed. Thanks for the help.

-Alex