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

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Old 02-09-2016, 02:49 AM   #1
lateapex911
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Join Date: Mar 2008
Location: Black Rock, CT
Posts: 8
My Ride: '03 M3 vert,
Classic top closing issue that the classic repairs don't seem to fix..

Hey guys- First, my first post...been a member for years now, reading and learning. Pretty good information here so thanks!

I have a 2003 M3 vert. Carbon black, cinnamon interior. I got it in '08 with about 40K on it, and it's got about 60 now. Mostly inside stored or at least covered in the winters.

So, I have the classic issue where the top will raise but stop just short of the header and the latches won't....latch. Top LED blinks it's annoyance. At that point, it won't go down. Using the "Comfort" feature on the drivers door yeilds the same results.

Based on the threads stickied here, I printed and checked the pins in the harness, and they all registered impedance. (I also slit the harness slightly at the classic front hinge point, but it looked flawless.)

So...what next?
Well, I guess a trip to the dealer is in order to get the trouble code.

And there's one more issue, which might be related. Power locking works on the doors, but the trunk remains locked, no matter how I try to unlock it. (Console switch, key in door, or momentary switch on left front kick panel.)

Can anyone point me to the thread I've missed?

Or advise me??

Thanks!

Jake.
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Old 02-09-2016, 03:57 PM   #2
sgoetz628
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Join Date: Mar 2008
Location: Connecticut
Posts: 407
My Ride: 2002 330 CiC
Quote:
Originally Posted by lateapex911 View Post
Hey guys- First, my first post...been a member for years now, reading and learning. Pretty good information here so thanks!

I have a 2003 M3 vert. Carbon black, cinnamon interior. I got it in '08 with about 40K on it, and it's got about 60 now. Mostly inside stored or at least covered in the winters.

So, I have the classic issue where the top will raise but stop just short of the header and the latches won't....latch. Top LED blinks it's annoyance. At that point, it won't go down. Using the "Comfort" feature on the drivers door yeilds the same results.

Based on the threads stickied here, I printed and checked the pins in the harness, and they all registered impedance. (I also slit the harness slightly at the classic front hinge point, but it looked flawless.)

So...what next?
Well, I guess a trip to the dealer is in order to get the trouble code.

And there's one more issue, which might be related. Power locking works on the doors, but the trunk remains locked, no matter how I try to unlock it. (Console switch, key in door, or momentary switch on left front kick panel.)

Can anyone point me to the thread I've missed?

Or advise me??

Thanks!

Jake.

I bought one of those code readers a few years back. I'm terrible with computers, so never got it to work. You are welcome to borrow it. And I will be in Fairfield, on Black Rock Tpke no less, tomorrow.

I'd be happy to meet and let you borrow/use it. Let me know.
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Old 02-09-2016, 05:38 PM   #3
lateapex911
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Join Date: Mar 2008
Location: Black Rock, CT
Posts: 8
My Ride: '03 M3 vert,
Thanks! But...my understanding is that only the dealership can actually read the code, no aftermarket device can. Does your reader specifically state that it can get the codes from the CVM?? (the convertible top module?)
Thats the key, to my understanding..
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Old 02-09-2016, 06:16 PM   #4
sgoetz628
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Location: Connecticut
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My Ride: 2002 330 CiC
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Originally Posted by lateapex911 View Post
Thanks! But...my understanding is that only the dealership can actually read the code, no aftermarket device can. Does your reader specifically state that it can get the codes from the CVM?? (the convertible top module?)
Thats the key, to my understanding..

No. Says "BMW SCANNER version 1.4.0" It is definitely aftermarket.

Before you take it to the dealer, I would call IPM in Westport, across the street from the main Metro North stop. He'll either confirm what you said or scan it for a lot less.

When the Ridgefield dealer wanted $150 and 2-3 hours just to scan for an airbag code, he charged me nothing for the one minute scan and then repaired it very reasonably. His number is 203-227-3300.

He even rides a Concours just like mine!

Good luck!
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Old 02-09-2016, 11:00 PM   #5
taylor192
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Join Date: Feb 2012
Location: The Best Place on Earth
Posts: 2,358
My Ride: 2003.5 M3
The wires break internally, and at the lower bend. Try measuring the impedance with the top partially folded, or with the top down.

Since you cut the harness open, try measuring continuity from the connector to past the first bend. Use a probe to poke through the wire insulation.
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Old 02-10-2016, 09:50 AM   #6
Poncho@home
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Location: Laval, Quebec
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My Ride: MY04 330Cic ZSP
Is there any noise coming from under the rear seat? When my top did that it was the convertible motor under the rear seat. The plastic gears are known to skip under extra load not operate the top properly. I fixed mine my adding some straps to maintain downward pressure on the gear mechanism

Read this post

http://forum.e46fanatics.com/showthr...5#post10619565

Also if you search my username I am pretty certain I posted my fix to it as well
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Old 02-17-2016, 02:37 AM   #7
lateapex911
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Join Date: Mar 2008
Location: Black Rock, CT
Posts: 8
My Ride: '03 M3 vert,
So, an update. I spent 3 hrs at the local BMW dealer. I asked them to provide me with the CVM codes and a diagnosis..

Took them 2 hrs. I had pulled the interior apart to save $ and give them access. The codes seemed to be red herrings in the end, as they claim it's the top cover motor. They suggest buying one for $270 for the motor, or $550 for the drive and motor. I need to understand this better, I think, before I start spending upwards of $500.

Poncho, thanks for your thoughts and the link, I've reviewed it and will take a close look this upcoming weekend.

I'm guessing that the top won't close all teh way because the motor is messing up and that triggers the CVM to bail on the closing operation, but, seems like odd timing to me. I'm sure the engineers have their reasons.

I had looked and run continuity checks on the harness, and it passed, and the tech did the same, and ....it passed. All up, with a 15% discount, that 2 hrs cost $300.
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