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jo996

problems with switch sunroof

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Hello,

Since last week I've had a problem with my sunroof. The switch with which to open the sunroof, in fact, consists of three switches/positions. In order to tilt the roof, normally, I have to push the round 'button' in the middle of the switch. For some reason this no longer works. First I have to press the 'close-switch' a few times. Then the roof tilts and closes again. Next I can use the 'open switch' to open the sunroof. It then seems to operate fine, but unfortunately not for long.

I have tried the 're-teaching' option. Again this seems to work, but not for long. My idea is that the 'tilt-open-close' cycle loses its memory. Has anyone got an idea what can possibly be wrong, or better yet, know the solution to this problem.

I forgot to mention that I drive a 996 (1998).

Regards,

Jo996

the Netherlands

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My sunroof switch loses it's memory a couple times per year. I re-train it and it is fine for several months.

I think this is just a problem with these cars.

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My sunroof switch loses it's memory a couple times per year. I re-train it and it is fine for several months.

I think this is just a problem with these cars.

Hello Loren,

Thank you for your answer. It wouldn't really be a problem if I had to re-teach the memory of the sunroof a few times per year. In my case, however, it loses its memory within, let's say, 2 or 3 minutes. Where in the car is the memory of the sunroof located. Can the memory be accessed? Can it be replaced? Have you heard of the problem before? Is disconnecting the battery an option? It is a way of re-setting other functions.

My car is due for its annual service this Tuesday. Can my Porsche dealer, for instance, reset the memory. Can they re-train the memory by means of a computer.

I know, ever so many questions, but it would be nice to have some idea of what is wrong with the switch/memory before asking Porsche to have a look at it. I wonder whether they have heard of this problem before and know how to solve it.

I happened to be in Germany on Friday and drove passed a Porsche Centre. I thought it would be a good idea to ask whether they had any idea what could be wrong. The answer I got was most dissatisfying. The mechanic tried the switch and said I had probably pushed the switch too often and therefore it (the sunroof/switch) did these strange things. I'm quite sure I gave the switch/sunroof plenty of time to 'understand' the commands.

Regards,

Jo996

the Netherlands

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I don't think the sunroof is that smart. I think all the "brains" are in the drive motor/circuit board assembly.

For your older car I wonder if the sunroof drive was upgraded per TSB 12a/98 6014 New Sunroof Drive Motor -- dated 9-10-99.

It says "As of February 1, 1999, and VIN: 99 XXS 62 5423, a new tilting/sliding roof drive assembly with enhanced circuitry is installed in production. The new drive assembly has optimized final-position

settings that result in lower noise levels."

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I don't think the sunroof is that smart. I think all the "brains" are in the drive motor/circuit board assembly.

For your older car I wonder if the sunroof drive was upgraded per TSB 12a/98 6014 New Sunroof Drive Motor -- dated 9-10-99.

It says "As of February 1, 1999, and VIN: 99 XXS 62 5423, a new tilting/sliding roof drive assembly with enhanced circuitry is installed in production. The new drive assembly has optimized final-position

settings that result in lower noise levels."

Hello Loren,

Suppose it is the drive motor/circuit board which is at fault. I take it it would have to be replaced. Is it something I can do myself? A very difficult DIY-job? Have you got any idea what a new unit would cost?

Jo996

the Netherlands

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The motor/control box is easy to change, don't forget to look at or ask Loren for basic adjust instructions before starting the learning procedure.

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The motor/control box is easy to change, don't forget to look at or ask Loren for basic adjust instructions before starting the learning procedure.

I have the exact same symptoms. I've tried reprogramming (works for a minute or two), I've looked for dust etc... around the switch itself but in vain...

Did anyone come up with a quick reason / solution on this issue aside from going into service and replacing the whole control/switch/motor lot?

Please advise.

JW

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Loren, what is the procedure to "retrain" the sunroof to its opening and closing positions. Mine in a 1999 C4 stops before the correct end positions, or reaches the closed position and then slides back to 4 inches open. Thanks for your help.

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