Comfort Access woes

nsjames · 05-31-2017, 07:51 PM

Hello. First post, new owner.

2008 328XIT

Has comfort access. None of it worked when I got the car Monday. Replaced all the fob batteries, still didn't work. Checked battery and it looked factory 90ah and registered 12.3V at rest.
Replaced battery with a new 110ah Duracell(East Penn). Just coded the CAS with new battery info and registered it with tools32.
Now one fob works and the other doesn't. Non functioning fob buttons work and it will start the car if you insert into dash.
I read that I hold the non functioning one up to the dash and start the car and it's supposed to learn, but it doesn't.

So I'm either doing it wrong or I'm missing a step.
suggestions?

VTECaddict · 05-31-2017, 08:53 PM

Could be the second fob was a replacement and the previous owner never had it programmed to enable CA functions.

nsjames · 05-31-2017, 09:35 PM

Quote:

Originally Posted by VTECaddict

Could be the second fob was a replacement and the previous owner never had it programmed to enable CA functions.

this is very possible.

Fob looks brand new. no wear marks.
I forgot to mention that.
Fob that works looks well used.

Can I program this in inpa or with tools32?

Wilt · 05-31-2017, 10:37 PM

Quote:

Originally Posted by nsjames

Checked battery and it looked factory 90ah and registered 12.3V at rest.
Replaced battery with a new 110ah Duracell(East Penn). Just coded the CAS with new battery info and registered it with tools32.
Now one fob works and the other doesn't. Non functioning fob buttons work and it will start the car if you insert into dash.
I read that I hold the non functioning one up to the dash and start the car and it's supposed to learn, but it doesn't.

So I'm either doing it wrong or I'm missing a step.
suggestions?

CA fob function is independent of radio transmitter FOB button control...it is separately enabled.
The CAS allows only TWO CA fobs to be active it its programming.
Did your second CA fob ever work correctly...and now it is not functioning for CA?

slupie · 06-01-2017, 08:30 AM

Quote:

Originally Posted by nsjames

Hello. First post, new owner.

2008 328XIT

Has comfort access. None of it worked when I got the car Monday. Replaced all the fob batteries, still didn't work. Checked battery and it looked factory 90ah and registered 12.3V at rest.
Replaced battery with a new 110ah Duracell(East Penn). Just coded the CAS with new battery info and registered it with tools32.
Now one fob works and the other doesn't. Non functioning fob buttons work and it will start the car if you insert into dash.
I read that I hold the non functioning one up to the dash and start the car and it's supposed to learn, but it doesn't.

So I'm either doing it wrong or I'm missing a step.
suggestions?

You might not be missing anything just have broken wire loom between your hatch and body.

http://www.e90post.com/forums/showthread.php?p=15902250

nsjames · 06-01-2017, 09:38 AM

Quote:

Originally Posted by Wilt

CA fob function is independent of radio transmitter FOB button control...it is separately enabled.
The CAS allows only TWO CA fobs to be active it its programming.
Did your second CA fob ever work correctly...and now it is not functioning for CA?

It hasn't worked since I got the car, all of 4 days ago.

To recap.
Both fobs did not work.
Replaced car battery because it was going to sleep and was original 2007 BMW battery.
One fob (well used) works with CA.
One fob (looks brand new) does not.

At this point I assume it is a replacement fob and was not coded.
Car was purchased at a local used car lot, not BMW or CPO. Came from auction. At some point it's possible that someone got another fob for it.
I'll have to look up how I code a new CA key in the CAS module.

I don't think it's a physical issue, because everything else works and the old fob works flawlessly now that the car isn't shutting things off because of battery voltage.

Mashman · 06-01-2017, 10:01 AM

Comfort Access will only work with 2 fobs. The 2 fobs that it will work with, are the 2 (enabled) comfort access fobs with the lowest key number. If the fob that you have is a comfort access fob, and it's not working with comfort access, it's most likely that there is another CA fob that is defined to the system, with a lower key number. If you disable any CA fobs that you do not have, then the one you do have should start working with CA.

Take a look at this post.

http://www.e90post.com/forums/showpo...88&postcount=4

nsjames · 06-01-2017, 06:10 PM

Quote:

Originally Posted by Mashman

Comfort Access will only work with 2 fobs. The 2 fobs that it will work with, are the 2 (enabled) comfort access fobs with the lowest key number. If the fob that you have is a comfort access fob, and it's not working with comfort access, it's most likely that there is another CA fob that is defined to the system, with a lower key number. If you disable any CA fobs that you do not have, then the one you do have should start working with CA.

Take a look at this post.

http://www.e90post.com/forums/showpo...88&postcount=4

you sir, are the man

this looks like exactly what needs to be done.

05-31-2017, 07:51 PM	#1
nsjames Brigadier General 2440 Rep 4,330 Posts Drives: 08 328xi Touring Join Date: May 2017 Location: ohio iTrader: (0)	Comfort Access woes Hello. First post, new owner. 2008 328XIT Has comfort access. None of it worked when I got the car Monday. Replaced all the fob batteries, still didn't work. Checked battery and it looked factory 90ah and registered 12.3V at rest. Replaced battery with a new 110ah Duracell(East Penn). Just coded the CAS with new battery info and registered it with tools32. Now one fob works and the other doesn't. Non functioning fob buttons work and it will start the car if you insert into dash. I read that I hold the non functioning one up to the dash and start the car and it's supposed to learn, but it doesn't. So I'm either doing it wrong or I'm missing a step. suggestions?
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05-31-2017, 08:53 PM	#2
VTECaddict Where'd my VTEC go? 481 Rep 6,067 Posts Drives: 06 330i 6MT Join Date: Mar 2009 Location: Seattle, WA iTrader: (4)	Could be the second fob was a replacement and the previous owner never had it programmed to enable CA functions. __________________ AW/Terra \| ZSP \| ZPP \| ZCW \| iDrive \| CA Mods: BC BR coilovers \| Blacklines \| M-tech rear \| dual exhaust \| M3 steering wheel \| BMW SSK \| ZHP shift knob \| High-kick CF spoiler \| NBT Retrofit M3 front control arms \| M3 rear guide rods \| Manzo rear toe and camber links \| Monroe rear shock mounts \| Varrstoen ES1 19x9.5+20 Front, 19x11+25 rear
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06-01-2017, 10:01 AM	#7
Mashman First Lieutenant 118 Rep 342 Posts Drives: E93 Join Date: Apr 2016 Location: Heaven / TX iTrader: (0)	Comfort Access will only work with 2 fobs. The 2 fobs that it will work with, are the 2 (enabled) comfort access fobs with the lowest key number. If the fob that you have is a comfort access fob, and it's not working with comfort access, it's most likely that there is another CA fob that is defined to the system, with a lower key number. If you disable any CA fobs that you do not have, then the one you do have should start working with CA. Take a look at this post. http://www.e90post.com/forums/showpo...88&postcount=4 __________________ I keep getting robbed because I leave the front door open.. I could close it but I feel doing so would be a victory for the thieves....
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