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E46 Convertible
The E46 vert forum. Talk about dropping your E46 top here.

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Old 03-23-2014, 04:48 PM   #1
password.
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Join Date: Mar 2014
Location: Reading
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newbie question..

Hi
I have bought a e46 convertible and having issues with the roof so I followed the guide but still no luck front of roof lifts about 2 inches then I get a click from n/s rear I have check the wires for continuity and all ok I have checked neither cable under rear seat is broken ,
The red light flashes when the roof stops about an inch or 2 up from rest position,
Iv checked the storage shelf is set ok boot is closed correctly???


Any other ideas at all??
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Old 03-24-2014, 08:37 AM   #2
E46DrEaMeR
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just for info, last year I had a similar problem with my roof doing the clicking thing! but i also I had battery trouble too! where it would let me down now n then but not all the time (I didn't connect the 2 problems) in the end I decided to replace the battery as it was the original from 2002 since then the roof problem has not re-occurred, so I wondered if it was the battery causing the roof to play up (low amps or something) may not be the same for you but its something to think about.
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Old 03-24-2014, 12:02 PM   #3
taylor192
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Read the CVM codes, the red light blinking indicates an error code is stored.

It'll cost you some money to have an independent shop do this, yet it is the best course of action after the steps you have taken. You probably have a bad sensor, or broken wire that is hard to diagnose. The code will point you to exactly what sensor is complaining.

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Old 03-24-2014, 05:21 PM   #4
password.
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Well I need a new battery any way as it keeps going flat so will get me one tomorrow and I'll bring my scanner home see if I can retrieve a code and post my finding cheers people
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Old 03-25-2014, 03:59 PM   #5
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No luck any more ideas?
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Old 03-25-2014, 04:00 PM   #6
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I haven't tried the scanner yet but batter didn't help
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Old 04-21-2014, 08:09 AM   #7
shift4inc
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You really need to get the codes from the cvm. It's the module that controls the soft top operation. However even that may not totally diagnose the problem. My cvm had no related codes stored to the problem I just solved. With dis (BMW diagnostic software) on my laptop I was able to watch the cvm inputs and outputs in real time. I discovered the cowl unlocked hall sensor intermittently read yes to no. Would not have been possible just testing continuity with the top in a static position. As the sensor only went from yes to no during the top operation and the back to yes after the top stopped halfway. I suspect broken wire in your case as well. The wire can be completely broken (as in my case) but manages to touch again for most of the top operation. Common breakage points are at any of the bends. Mine broke near the base of the tension bow (I believe this is what it's called) but many break near the first bend by the windshield. I have also read the some people have simply run a jumper wire the length of the harness from as near the cvm as possible to as near the cowl panel as possible. If you do this be sure your wires don't interfere with the mechanism. I have also read that typically the smaller wires to the cowl hall sensors are most common for breaking. Green white and blue white I believe are the colours. Good luck!!!

This is where mine broke and the repair I did

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2004 330Ci Vert
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