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

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Old 05-17-2017, 06:05 AM   #21
Yo Adrian
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Taylor i think hit it on the money, Vibration is a strange animal, current draw is one thing, but be it as it is may, vibration can cause a wire that is broken being held by the insulation or a loose connector to partially open (drop in voltage) or cause an open circuit. The norm of what i noticed around has been the harness but i am interested at what point it stops working all together what it ends up being. The hunt has begun! keep us posted.
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Old 05-17-2017, 03:11 PM   #22
2000E46VER
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Taylor & Yo Adrian, thanks for your posts.
in the past, I had experienced a completely severed wire where the roof stopped working completely.
Prior to that happening, one of the symptoms I encountered was that the roof would go down but wouldn't go up again unless the engine was switched off and then on again. A week or two later the roof stopped working altogether and a completely broken wire was found. So, back then, it does appear that there was some correlation between a wire on its last legs and having to mess around with the ignition switch to get the roof to work. It wouldn't totally surprise me if there was another wire on its last legs resulting in the current problem I'm experiencing.

If that is the case then, over time, the wire will eventually break completely, the roof won't work at all and it should be easier to pinpoint the problem as a totally broken wire is easier to find compared to a partially broken one.

I'm still sceptical about the vibration idea though because I can operate the roof with the engine on but have to keep cycling the engine off and on multiple times as mentioned in an earlier post.

323ci_pak, thanks for letting us know that you also have the same problem.
There's 3 of us in the same boat at the moment which will hopefully lead us to the root cause sooner.
If you think that comfort opening/closing from the key is somehow responsible, then one test you can do is to deactivate that functionality to see if the problem goes away or remains. Let us know if you conduct that test.
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Old 05-18-2017, 01:09 AM   #23
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works with battery charger

hi, this morning I have experienced some strange thing.
I have a brand new battery, but I put it on charger because the many opening/closing without running engine...
So this morning the car was on battery charger and I had a sudden idea to start the engine and try to open the roof - and it worked completely!!
After that I pushed the closing button, but nothing happened, nor the red light flashing..

As I noticed, my wiring loom is in also very bad condition at the turning points, so this weekend I try to explore if any wire is damaged..
But will also try to deactivate the comfort module - as you suggested! I only have to resolder about 12-14 wires
Thanks!
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Old 05-18-2017, 01:21 PM   #24
Selymbr
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Does anyone knoe what this error code means?

47 VSW HTOP. input-voltage >5 volts

Like i said in my original thread I presume this is a faulty sensors but what one?
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Old 05-18-2017, 01:49 PM   #25
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BLUE relay

hi, today I had a conversation with a bmw specialist guy, and he suggested to replace a blue relay below the glove compartment. He said, that this old relay can cause insufficient voltage, so faulty operation! tomorrow i will replace it.
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Old 05-18-2017, 02:25 PM   #26
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My problem seems to be the opposite as it says I have "too much" voltage.
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Old 05-19-2017, 03:48 AM   #27
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he also showed me the circuit diagram of the roof operation with about 20 relays, sensors and micro switches etc - so it could be a long story to find the guilty one
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Old 05-19-2017, 09:41 AM   #28
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That is where INPA comes in handy as I think it has told me what sensor is faulty. However I cant determine which one it is as I cant find the fault code list for the CVM.

If anyone knows where I can find it, it would be much appreciated.
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Old 05-19-2017, 02:10 PM   #29
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tell us the fault code you have, and i try to ask this guy!
i only have pa soft scanner, and it doesn't give any sensor error code
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Old 05-19-2017, 02:11 PM   #30
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you mean this one?
47 VSW HTOP. input-voltage >5 volts
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Old 05-19-2017, 05:51 PM   #31
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323ci_pak, I'd be very interested to know if replacing the blue relay behind the glove box resolves the problem.
I think that's the K18363 convertible top relay. Please keep us informed about any developments on that front.
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Old 05-23-2017, 06:43 AM   #32
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relay was a dead end

hi,
i got the relay yesterday, and replaced this morning, but nothing has changed!
yes, it was the K18363 roof relay..
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Old 05-23-2017, 06:45 AM   #33
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and one more thing: after 30 min searching finally I have found it in the engine bay not behind the glove box...
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Old 05-23-2017, 06:49 AM   #34
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Old 05-23-2017, 04:10 PM   #35
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Thanks for the update.
Well, at least you've excluded that relay as being responsible.
The search goes on...
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Old 05-24-2017, 02:42 AM   #36
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hi, last knight I have disconnected the comfort module, reconnected the brown-violet and brown-red button wires directly (8/9 pin of the plug connector on the center console), and the roof works properly again!!

somehow the comfort module has disabled the voltage during the engine was running and only let it on ignition.

one idea: maybe it worth to measure the white/red/yellow wire also (23 pin of the plug connector), because it's connected somehow to the roof moderation (and also to the comfort module) ...
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Old 05-24-2017, 05:18 AM   #37
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My roof issue has been solved!!! It was the hard top switch sensor producing an incorrect voltage. I used the cowl locking sensors I had left over as they didn't fix the problem and cut the faulty sensor off and soldered on a working cowl locking sensors and the roof works perfectly. It doesn't go down the button the key though but maybe this just isn't programmed on my car.
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Old 05-24-2017, 05:25 AM   #38
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great! congrats!

if you want to have remote opening/closing via the car key, here is the link to to module:
http://www.fbc-electronics.com/en/Home.aspx
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Old 05-24-2017, 10:42 AM   #39
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Quote:
Originally Posted by Selymbr View Post
My roof issue has been solved!!! It was the hard top switch sensor producing an incorrect voltage. I used the cowl locking sensors I had left over as they didn't fix the problem and cut the faulty sensor off and soldered on a working cowl locking sensors and the roof works perfectly. It doesn't go down the button the key though but maybe this just isn't programmed on my car.
I guess we know what this code means now:

47 VSW HTOP. input-voltage >5 volts

I wonder if the "dealer" software would have found this sooner. When I removed the hard top kit from my car, yet didn't reprogram the car, the fault code was obvious the sensor was missing.

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Old 05-24-2017, 04:28 PM   #40
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So, sounds like we got 2 different solutions here:

1. A non-standard module (that allows the roof to be opened or closed with a few quick clicks of the key or, if you like,
without holding down the key button which is what you get when coding the gm5 for comfort opening/closing)
somehow interfering when engine on.

2. Hard top switch sensor causing incorrect voltage with engine on

I don't have a non-standard module on my vehicle although my gm5 has been coded for comfort opening/closing.
In my case, it might be the hard top sensor.

Is there any info on our forum on how to replace the hard top sensor?

Thanks for the updates guys, very interesting, hopefully will be useful to others also.
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