Comfort access issue... any help?

Level3 · 01-16-2017, 03:31 PM

Hi, hoping one of you guys can help me brainstorm an issue I'm having. Yesterday comfort access stopped working on my 135i. I checked the fuses today and fuse #61 had blown. Went to the auto parts store and grabbed a fuse and replaced it. Well... now my doors and trunk unlock via touch but my car is still asking for the key to be inserted. I checked all the other key function fuses and also the fuses associated with Start Stop (except #85, my car had no fuse in this slot to begin with). Any ideas on what could be causing this? Thanks!

Level3 · 01-16-2017, 03:53 PM

I had changed the batteries in my key as one of my first trouble shooting points... turns out the NEW battery I inserted must've been weak. I held the key close to the steering column and it started with key battery warning light. So went back inside and got the other battery in my pack of 2 batteries I bought and tried it. Works fine now. Whew!

ODU135 · 01-16-2017, 04:10 PM

thats interesting. When your comfort access stopped working, was it in all spots on the car or just one in particular? Mine stopped working on my drivers side front door only. Im thinking maybe there is a fuse for just that door that was blown. Im gonna look at the fuse box in the next day or two

Level3 · 01-16-2017, 04:22 PM

all my comfort access stopped working when the fuse blowed. It started working again when I replaced the fuse... I guess maybe ignition takes more battery juice than the doors? If it's just your door handle it's probably that particular door handle. Other people have had the issue of just a particular component and had to replace that component.

Level3 · 01-16-2017, 06:54 PM

Spoke too soon. No longer working and can't replicate the low battery in key warning even with old battery. Back to looking for possible causes.

1smokehouse · 01-16-2017, 09:26 PM

I was having issues with mine as well. One key didn't work at all and the other was intermittent. The dealer loaded the latest DME and iDrive software. Now they both work as long as I don't I have my cell with me (iPhone 6+)... Seems to interfere with the signal from the FOB.

1N4ttro · 01-17-2017, 11:33 AM

Add me to this list. I had a fuel filter sensor and 1 injector replaced last week and once I got the car back CA now does not work. The shop recommended I replace the fob battery which will most likely fix it they said. Replacing battery tonight to see what happens. The shop also said that the work they performed has nothing to do with the CA not working but I am a little skeptical because it is too much of a coincidence. What do you guys think? Is there any possibility they could have screw things up by performing this work?

1N4ttro · 01-18-2017, 05:10 PM

It turned out to be the battery in the fob. I'm surprised to find that the old battery measured at 2.79v which is not that far off from new 3.00v and that was enough for CA to not work. CA works perfectly every time now.

01-16-2017, 03:31 PM	#1
Level3 1/2 Asian Sensation 217 Rep 397 Posts Drives: 2011 BMW M3 e92 ZCP Join Date: Dec 2014 Location: Raleigh, North Carolina iTrader: (2) Garage List 2011 BMW M3 e92 ZCP [0.00] 2008 BMW 135i Conve ... [9.00]	Comfort access issue... any help? Hi, hoping one of you guys can help me brainstorm an issue I'm having. Yesterday comfort access stopped working on my 135i. I checked the fuses today and fuse #61 had blown. Went to the auto parts store and grabbed a fuse and replaced it. Well... now my doors and trunk unlock via touch but my car is still asking for the key to be inserted. I checked all the other key function fuses and also the fuses associated with Start Stop (except #85, my car had no fuse in this slot to begin with). Any ideas on what could be causing this? Thanks! __________________ All too easy...
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01-16-2017, 03:53 PM	#2
Level3 1/2 Asian Sensation 217 Rep 397 Posts Drives: 2011 BMW M3 e92 ZCP Join Date: Dec 2014 Location: Raleigh, North Carolina iTrader: (2) Garage List 2011 BMW M3 e92 ZCP [0.00] 2008 BMW 135i Conve ... [9.00]	I had changed the batteries in my key as one of my first trouble shooting points... turns out the NEW battery I inserted must've been weak. I held the key close to the steering column and it started with key battery warning light. So went back inside and got the other battery in my pack of 2 batteries I bought and tried it. Works fine now. Whew! __________________ All too easy...
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01-16-2017, 04:10 PM	#3
ODU135 College Student 16 Rep 45 Posts Drives: 2008 BSM 135i 6MT Join Date: Jun 2016 Location: Norfolk, Virginia iTrader: (0)	thats interesting. When your comfort access stopped working, was it in all spots on the car or just one in particular? Mine stopped working on my drivers side front door only. Im thinking maybe there is a fuse for just that door that was blown. Im gonna look at the fuse box in the next day or two __________________ just bought the car, saving up to go FBO! Mods so far: 20% window tint \| ZHP weighted shift knob \| Alcantara shift boot \| powder coated wheels black \| tow-hook front plate mount
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01-16-2017, 04:22 PM	#4
Level3 1/2 Asian Sensation 217 Rep 397 Posts Drives: 2011 BMW M3 e92 ZCP Join Date: Dec 2014 Location: Raleigh, North Carolina iTrader: (2) Garage List 2011 BMW M3 e92 ZCP [0.00] 2008 BMW 135i Conve ... [9.00]	all my comfort access stopped working when the fuse blowed. It started working again when I replaced the fuse... I guess maybe ignition takes more battery juice than the doors? If it's just your door handle it's probably that particular door handle. Other people have had the issue of just a particular component and had to replace that component. __________________ All too easy...
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01-16-2017, 06:54 PM	#5
Level3 1/2 Asian Sensation 217 Rep 397 Posts Drives: 2011 BMW M3 e92 ZCP Join Date: Dec 2014 Location: Raleigh, North Carolina iTrader: (2) Garage List 2011 BMW M3 e92 ZCP [0.00] 2008 BMW 135i Conve ... [9.00]	Spoke too soon. No longer working and can't replicate the low battery in key warning even with old battery. Back to looking for possible causes.
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01-16-2017, 09:26 PM	#6
1smokehouse Second Lieutenant 138 Rep 253 Posts Drives: 2013 128i LE Join Date: Feb 2015 Location: Guam iTrader: (0) Garage List 2013 BMW 128i LE [9.00]	I was having issues with mine as well. One key didn't work at all and the other was intermittent. The dealer loaded the latest DME and iDrive software. Now they both work as long as I don't I have my cell with me (iPhone 6+)... Seems to interfere with the signal from the FOB. __________________ // '13 BSM 128i Limited Edition //
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01-17-2017, 11:33 AM	#7
1N4ttro Private First Class 38 Rep 171 Posts Drives: 09 135i Join Date: Nov 2016 Location: MA iTrader: (0)	Add me to this list. I had a fuel filter sensor and 1 injector replaced last week and once I got the car back CA now does not work. The shop recommended I replace the fob battery which will most likely fix it they said. Replacing battery tonight to see what happens. The shop also said that the work they performed has nothing to do with the CA not working but I am a little skeptical because it is too much of a coincidence. What do you guys think? Is there any possibility they could have screw things up by performing this work? __________________ 2009 135i M Sport • 6MT • Space Gray/Terracotta • JB4 • 261s Last edited by 1N4ttro; 01-17-2017 at 09:53 PM..
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01-18-2017, 05:10 PM	#8
1N4ttro Private First Class 38 Rep 171 Posts Drives: 09 135i Join Date: Nov 2016 Location: MA iTrader: (0)	It turned out to be the battery in the fob. I'm surprised to find that the old battery measured at 2.79v which is not that far off from new 3.00v and that was enough for CA to not work. CA works perfectly every time now. __________________ 2009 135i M Sport • 6MT • Space Gray/Terracotta • JB4 • 261s Last edited by 1N4ttro; 02-01-2017 at 12:36 PM..
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