[n8s 330xi]

So I was doing the camera install diy on this page:
http://www.e90post.com/forums/showth...1005301&page=8

And after wiring everything up, my climate control system won't power on. No blower or anything either. Using the BMWhat app, it doesn't even seem to see that control module.

I figured maybe it's a fuse, but I did a visual inspection of every fuse I could find that had anything to do with the climate control system and none look blown. I may go buy a bunch of fuses and replace them anyway in hopes one is blown but not obvious. However, I'm hoping maybe somebody else has run into something that may make sense.

For example, are there any wires for the climate control system that run to the head unit? I wasn't splicing to any other wires than what go into there.

Edit: It's probably worth noting that at one point, I did turn the car on with the climate control system not connected.

[jwzimm]

Make sure the connectors on the back of the control module are plugged in fully.

[n8s 330xi]

Originally Posted by jwzimm

Make sure the connectors on the back of the control module are plugged in fully.

Yeah, I unplugged and replugged the damned things about 5 times hoping that was the issue. I also looked to see if there were any bent/damaged pins, but it all looks good.

[n8s 330xi]

*bump*
Would the module normally be deactivated by not having the console connected somehow? I would think the module is part of the ECU itself, so it shouldn't be gone if the console had no power?

[ajaye]

Originally Posted by n8s 330xi

I figured maybe it's a fuse, but I did a visual inspection of every fuse I could find that had anything to do with the climate control system and none look blown. I may go buy a bunch of fuses and replace them anyway in hopes one is blown but not obvious. However, I'm hoping maybe somebody else has run into something that may make sense.

Before you go pulling/buying/changing fuses, spend the money on a digital multimeter. Even the <$20 meters are more than adequate for continuity testing and it will be 100 times faster than identifying and pulling/replacing each fuse. Even if you spend a bit more it will pay for itself within a few months pretty easily. Sorry I don't have any info on the CC issue but yeah you should definitely have a meter if you're doing this kind of stuff anyway it will make your life a lot easier.

[kfriceman]

Wow, after reading some of that linked thread about this mod your problems could be just about anywhere.

Good luck,

Kevin

[n8s 330xi]

Originally Posted by ajaye

Before you go pulling/buying/changing fuses, spend the money on a digital multimeter. Even the <$20 meters are more than adequate for continuity testing and it will be 100 times faster than identifying and pulling/replacing each fuse. Even if you spend a bit more it will pay for itself within a few months pretty easily. Sorry I don't have any info on the CC issue but yeah you should definitely have a meter if you're doing this kind of stuff anyway it will make your life a lot easier.

Thanks. Mine had finally kicked the bucket a while ago and I hadn't replaced it yet. Maybe it's time.

Wow, after reading some of that linked thread about this mod your problems could be just about anywhere.

Good luck,

Kevin

Yeah, that is a fairly invasive upgrade. I know it's not a bumped wire issue, because I ran the wires from the trunk to the front a while ago. All I did yesterday was actually splice in the wires, but I don't think any of those wires I spliced into should have anything to do with this.

[ctuna]

You are aware that it turns off with a battery disconnect
and all you have to do is press the fan up button to turn it on
and the fan down button to turn it off aren't you .
I ran into this in a stereo install and didn't even know it could be turned
off.
Turning the temp controls to the right also turns it on I think the other
buttons don't though.

electical e90 pdf
http://www.google.com/url?sa=t&rct=j...,d.cGU&cad=rja
http://www.google.com/url?sa=t&rct=j...85464276,d.cGU
http://www.google.com/url?sa=t&rct=j...85464276,d.cGU

[n8s 330xi]

Originally Posted by ctuna

You are aware that it turns off with a battery disconnect
and all you have to do is press the fan up button to turn it on
and the fan down button to turn it off aren't you .
I ran into this in a stereo install and didn't even know it could be turned
off.
Turning the temp controls to the right also turns it on I think the other
buttons don't though.

electical e90 pdf
http://www.google.com/url?sa=t&rct=j...,d.cGU&cad=rja

http://www.google.com/url?sa=t&rct=j...85464276,d.cGU
http://www.google.com/url?sa=t&rct=j...85464276,d.cGU

Yeah, I keep trying to get it to turn on every time I undo some of the changes I made, but nothing happens when I hit those buttons (I just barely tried it again).

Thanks for the links there. I'm going through them, but oddly none of them actually have a climate control section, despite it being listed in the sidebar. Did I get the wrong links?

[ctuna]

http://bmwcoders.com/forum/attachmen...te-control.pdf

There are more like this at bmwcoders. com

At the following thread.

http://bmwcoders.com/forum/3-er-8/bm...1-e92-e93-291/

[n8s 330xi]

Originally Posted by ctuna

http://bmwcoders.com/forum/attachmen...te-control.pdf

There are more like this at bmwcoders. com

At the following thread.

http://bmwcoders.com/forum/3-er-8/bm...1-e92-e93-291/

Awesome. Thanks! I had to register, but it's probably a good idea anyway. I'm going through the doc to find the wire I may have broken now.

[ctuna]

there is a lot of technical stuff an bmwcoders. com
its a really good resource for this type of info.

[n8s 330xi]

Well, unfortunately I can't see any reason for this failure except that I've fried my climate control unit and now I'm going to have to buy another and hope it's going to fix it.

Anybody know a cheap place to get one? Only place I've seen is eBay from the UK, which is going to take a while.

Edit: found one for $70 on ebay. High price to pay for this mod.

[ctuna]

So you have scanned the car with a BMW Scanner
and you know the battery is good and the IBS system isn't
turning stuff off . If you work on these cars with the doors
or trunk open it can drain the battery as the car remains awake.
Usually other stuff will be turned off to like the radio.

Did you do any coding that could have messed things up.
That control module seems like the least likely thing that could
go wrong.

[n8s 330xi]

Originally Posted by ctuna

So you have scanned the car with a BMW Scanner
and you know the battery is good and the IBS system isn't
turning stuff off . If you work on these cars with the doors
or trunk open it can drain the battery as the car remains awake.
Usually other stuff will be turned off to like the radio.

Did you do any coding that could have messed things up.
That control module seems like the least likely thing that could
go wrong.

Yep. I've scanned and cleared a dozen times on it. Fault is CDA9: Message (air conditioning demand)
I did end up completely draining the battery, but even after recharging it entirely it's not coming on. This morning when I first started the car it briefly flickered to life before crapping out again, which made me think there's a short somewhere, but still no fuses popped. I've wiggled all cables possible to see if that does anything, but have had no luck. That's why I think something is fried inside the unit itself.

I haven't made any module settings changes, since I don't have the right software yet.

[n8s 330xi]

To close out this thread - a new module corrected the issue. I must've shorted it out somewhere and cooked it.

[woggledog]

Originally Posted by n8s 330xi

To close out this thread - a new module corrected the issue. I must've shorted it out somewhere and cooked it.

This is good news. However, how old is your battery? If it's been completely drained, and it's 5 years old +, you may need a new battery.

[n8s 330xi]

Originally Posted by woggledog

This is good news. However, how old is your battery? If it's been completely drained, and it's 5 years old +, you may need a new battery.

I'll have to look into that. I just bought it a few months ago, and I wouldn't be surprised if it's the original battery.

[Supra2k6]

Did you do the install with the battery disconnected? These cars are so fragile i swear.

[n8s 330xi]

Originally Posted by Supra2k6

Did you do the install with the battery disconnected? These cars are so fragile i swear.

I didn't. That's the dumb I did. Don't do this dumb because it's dumb to do.