Audi A4 Cabriolet - Roof warning light flashing 10x

**wiffers** · 13-11-2016,07:36 PM

Hi guys, I'm new here, and just bought my Audi, expect my welcome post soon

I have a 2006 A4 3.2 FSI Quattro S-line. - B7.

Anyway, the roof works perfectly. But when I turn the engine on I get 10 flashes of the warning light.

Had the faults read
02000 - Switch position inplausible
01986 - Convertible top frame position sensor (G356) - electrical fault in circuit
00532 - Supply voltage B+ lower limit exceeded
(top frame poition for G356 was 237)

I had them reset, put the roof on and off a few times, no light at all.

Drove for week or two (perhaps 5-7 roof cycles) - all OK

Now come back on again!

I've looked at the top frame position sensor (on one side at least - are there two?) and it looks to be plugged in and hasn't broken. The whole system looks pretty tidy.

Seems silly buying a sensor if it's not that.

've only used roof with engine on.

Any ideas?

Thx

**wiffers** · 16-11-2016,09:59 AM

Streamlining posts

**wiffers** · 25-11-2016,09:55 AM

bump

**Sam** · 25-11-2016,09:59 AM

Have the codes also returned?

**wiffers** · 25-11-2016,10:03 AM

That was my next step - to find that out. I'd imagine a code has returned, and I'm assuming the same, but need to check that out.

**Sam** · 25-11-2016,10:11 AM

There's a manual roof reset procedure which may clear the warning light, but I suspect there's something else amiss.

Reset procedure is detailed in this thread; How do you reset automatic roof?

**wiffers** · 25-11-2016,10:18 AM

Yeah, I saw that, but thoiught it's stramge having to manually wind it when the roof actually works. Could be worth a pop I guess.

I did reset the light, but it came back.

I'll try a manual reset and read the codes again I guess. It's just weird getting an error when it all works.

**wiffers** · 30-11-2016,02:11 PM

Originally Posted by Sam

Have the codes also returned?

Hello mate, just had it read/reset with VCDS, and the codes were as follows:

02000 - Switch position - 008 - implausible signal - intermittent
01986 - Convertible top frame position sensor (G356) - 012 electrical fault in circuit
01988 - Convertible top operation switch (E137); Close 012 - electrical fault in circuit - intermittent

The roof works fine - not done manual reset yet.

Any ideas?

**wiffers** · 01-12-2016,02:22 PM

Edit - manually reset roof - fingers crossed

**wiffers** · 01-12-2016,06:20 PM

Warning light back , but took a few cycles to do so
getting this
01986 - Convertible top frame position sensor (G356) - 012 electrical fault in circuit

But sensor looks OK?

Time to replace it?