Comfort access stopped working

DLucian · 10-12-2023, 03:34 AM

Greetings,

Title pretty much sums it up. Parked the car overnight and the next morning, CA won't work. Was in a rush so I opened via the key fob.

A few hours later, I tried it again and it still did not work. Tried both door handles for both closing and opening and also the trunk and nothing.

Connected a scan tool and the CA system has only a rear bumper aerial error that I've had since I got the car (trunk does engage a little slower, usually, probably because of this).

Changed the key fob battery, same issue. Got the spare key, same issue. Where should I start diagnosis on this? I feel like it could be a million things.

DLucian · 10-12-2023, 03:45 AM

Okay, so, I thought about deleting this but I am considering leaving it so that maybe someone else learns from my stupidity.

I share the car with my business associate and he initially brought the car up from the parking space but I proceeded to drive. I keep my key in my pocket, always (because this is why it has freaking COMFORT ACCESS and keyless engine start). He puts his key in the ignition, like a rudimental man that he is.

Anyway, we drive off, I drop him at the airport and, you can see where this is going. He left his key in the ignition and I did not see it. Meanwhile, I kept trying to use CA to lock the car but it would not do it, obviously. But, I could lock the car using my own key, so this threw me off.

Anyway, hope someone else learns from this. Enjoy your day everyone!

ctuna · 10-12-2023, 01:39 PM

Diversity Antenna and connections to it is usually the first thing to check.
You are better off to search for answers to this in the general section.

Be sure the car battery is good.

10-12-2023, 03:34 AM	#1
DLucian Private 7 Rep 63 Posts Drives: E91 335i N55 \| F20 125I B48 Join Date: Mar 2021 Location: Romania iTrader: (0)	Comfort access stopped working - no fault codes Greetings, Title pretty much sums it up. Parked the car overnight and the next morning, CA won't work. Was in a rush so I opened via the key fob. A few hours later, I tried it again and it still did not work. Tried both door handles for both closing and opening and also the trunk and nothing. Connected a scan tool and the CA system has only a rear bumper aerial error that I've had since I got the car (trunk does engage a little slower, usually, probably because of this). Changed the key fob battery, same issue. Got the spare key, same issue. Where should I start diagnosis on this? I feel like it could be a million things.
	Appreciate 0 Tweet Quote

10-12-2023, 03:45 AM	#2
DLucian Private 7 Rep 63 Posts Drives: E91 335i N55 \| F20 125I B48 Join Date: Mar 2021 Location: Romania iTrader: (0)	Okay, so, I thought about deleting this but I am considering leaving it so that maybe someone else learns from my stupidity. I share the car with my business associate and he initially brought the car up from the parking space but I proceeded to drive. I keep my key in my pocket, always (because this is why it has freaking COMFORT ACCESS and keyless engine start). He puts his key in the ignition, like a rudimental man that he is. Anyway, we drive off, I drop him at the airport and, you can see where this is going. He left his key in the ignition and I did not see it. Meanwhile, I kept trying to use CA to lock the car but it would not do it, obviously. But, I could lock the car using my own key, so this threw me off. Anyway, hope someone else learns from this. Enjoy your day everyone!
	Appreciate 0 Quote

10-12-2023, 01:39 PM	#3
ctuna Lieutenant General 1926 Rep 13,134 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	Diversity Antenna and connections to it is usually the first thing to check. You are better off to search for answers to this in the general section. Be sure the car battery is good.
	Appreciate 0 Quote