Installed a hitch and comfort access does not work now

flek2 · 04-27-2017, 03:07 PM

Hey everyone i have a 2015 X5 with comfort access installed. Today i got the car to a local bike shop and they installed a tow hitch for me. I was watching the guy work on my car and i saw him disconnect the sensors on my bumper and the two taillights on the car. Now after all was installed i tested the sensors and the backup camera, the back up sensors and the taillights. All worked great but when i came home and tried to lock the car with just touching the handle it would not work. I had to lock it with the button from the key. Further i can not open the tailgate and i can close it from the button on it but not lock it. Does anyone have any idea on what might have gone wrong there? Any help would be appreciated.

Thanks!

CoopersF15 · 04-27-2017, 04:58 PM

Would be interested to hear about this too

turboawd · 04-27-2017, 10:50 PM

was the ignition on during install? perhaps battery got low and turned off some electronics.
i'd give it a day or two and see if it goes back to normal.
also, is there a chance your key fob battery is low?

flek2 · 04-28-2017, 08:40 AM

No the ignition was not on also the battery on the fob is not low. I was looking around and it seems like there is a sensor to open the back hatch with your leg. I bet we messed up something with that sensor and it shut off the entire comfort access.

turboawd · 04-28-2017, 08:50 AM

Quote:

Originally Posted by flek2

No the ignition was not on also the battery on the fob is not low. I was looking around and it seems like there is a sensor to open the back hatch with your leg. I bet we messed up something with that sensor and it shut off the entire comfort access.

i didnt know x5 have the tailgate leg sensor. where is the sensor at? being blocked by hitch?

Alan l. · 04-28-2017, 09:43 AM

The X5 doesn't have the rear tailgate leg sensor even with comfort access. Neither of my X5's had it.

Alan

Doanster · 04-28-2017, 10:50 AM

Thought I was in a Ford Escape forum for a minute there.

stewy604 · 04-28-2017, 05:48 PM

Quote:

Originally Posted by Doanster

Thought I was in a Ford Escape forum for a minute there.

Bahahaha

flek2 · 05-01-2017, 02:12 PM

And we connected a scan tool and here is what the tool told us:

Flying Ace · 05-01-2017, 02:30 PM

taking a stab here in the dark for others to opine on. Could it be an FRM issue too?
On past cars, comfort access issues and issues with locking has been related to FRM.

spike5150 · 05-01-2017, 09:37 PM

Did they install a wiring harness too, or just the mechanical hitch parts?

TOPEC · 05-01-2017, 11:45 PM

there should be a sensor within the rear bumper for comfort access for rear detection. possible the installer may have disconnected it and forgot to connect it back.

Doanster · 05-02-2017, 01:38 AM

Quote:

Originally Posted by TOPEC

there should be a sensor within the rear bumper for comfort access for rear detection. possible the installer may have disconnected it and forgot to connect it back.

Sounds like the opposite from the scan verbiage. Installer probably pinched a wire hard enough to cause a pwr/gnd short vs forgetting to plug the sensor back in, which would throw an open circuit error.

Apple Corps · 05-02-2017, 02:08 PM

Kind of a "smarty pants" answer on my part - but a root cause analysis would focus on:

Today i got the car to a local bike shop and they installed a tow hitch

alphaod · 05-03-2017, 12:30 AM

The fact that you had some biker install a hitch onto to a car is questionable.

flek2 · 05-03-2017, 08:02 PM

Quote:

Originally Posted by Apple Corps

Kind of a "smarty pants" answer on my part - but a root cause analysis would focus on:

Today i got the car to a local bike shop and they installed a tow hitch

Well i spoke with him made sure he is knowleageble. Plus my local dealer told me to go somewhere else for that. And installing the hitch does not seem to be such a big deal from what i read around. I am going back tomorrow so we are to look for the pinched wire. Hope it will work out ok.

No woreing harnesses were installed just the hitch.

Almaretto · 05-04-2017, 12:40 AM

Quote:

Originally Posted by Flying Ace

taking a stab here in the dark for others to opine on. Could it be an FRM issue too?
On past cars, comfort access issues and issues with locking has been related to FRM.

FRM is not present on F15/F16/F85/F86. FRM/CAS functions are all in BDC_Body.

Quote:

Originally Posted by flek2

And we connected a scan tool and here is what the tool told us:

Is scan tool able to clear errors?

longleggedbc · 07-21-2017, 05:22 PM

Did you get this resolved? What was the issue?

nugoori · 07-08-2019, 01:01 PM

OP, have you resolved this by any chance?
I am in same exact situation, please help
thanks,

Maverik259 · 07-08-2019, 06:55 PM

Quote:

Originally Posted by nugoori

OP, have you resolved this by any chance?
I am in same exact situation, please help
thanks,

Given he hasn't been active in over 2 years I'm gonna go ahead and say he's not going to answer you. Are you having the same issue or just digging up 2 year old threads cuz your bored? Lol

7f15 · 09-23-2021, 12:37 PM

Digging up an old post as a PSA. I lost CA after a hitch install. I thought it was a coding issue. Turns out I pinched the bumper aerial CA wire between the hitch bar mount and the frame resulting in “Comfort Access Limited” and CA not working. The wire was smooshed to smithereens. This in turn shorted the CA wire which matched up with the fault I saw in ISTA. Seems obvious now and this thread helped point me in the right direction. This should provide resolution and hopefully helps others.

It might be a good idea to unplug the CA wire from the aerial prior to hitch install to prevent this.

04-27-2017, 03:07 PM	#1
flek2 Registered 1 Rep 4 Posts Drives: 2015 X5 Join Date: Apr 2017 Location: Atlanta iTrader: (0)	Installed a hitch and comfort access does not work now Hey everyone i have a 2015 X5 with comfort access installed. Today i got the car to a local bike shop and they installed a tow hitch for me. I was watching the guy work on my car and i saw him disconnect the sensors on my bumper and the two taillights on the car. Now after all was installed i tested the sensors and the backup camera, the back up sensors and the taillights. All worked great but when i came home and tried to lock the car with just touching the handle it would not work. I had to lock it with the button from the key. Further i can not open the tailgate and i can close it from the button on it but not lock it. Does anyone have any idea on what might have gone wrong there? Any help would be appreciated. Thanks!
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04-27-2017, 04:58 PM	#2
CoopersF15 Second Lieutenant 95 Rep 274 Posts Drives: F15 Xdrive 40e Performance Join Date: Apr 2017 Location: . iTrader: (0)	Would be interested to hear about this too __________________ 2017 F15 40i ePerformance -M Sport
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04-27-2017, 10:50 PM	#3
turboawd Banned 1636 Rep 2,995 Posts Drives: 2015 X5 35i Join Date: May 2015 Location: United States iTrader: (0)	was the ignition on during install? perhaps battery got low and turned off some electronics. i'd give it a day or two and see if it goes back to normal. also, is there a chance your key fob battery is low?
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04-28-2017, 08:40 AM	#4
flek2 Registered 1 Rep 4 Posts Drives: 2015 X5 Join Date: Apr 2017 Location: Atlanta iTrader: (0)	No the ignition was not on also the battery on the fob is not low. I was looking around and it seems like there is a sensor to open the back hatch with your leg. I bet we messed up something with that sensor and it shut off the entire comfort access.
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04-28-2017, 09:43 AM	#6
Alan l. Major General 5434 Rep 8,805 Posts Drives: 2020 F95 X5M Competition Join Date: Jun 2009 Location: United States iTrader: (9)	The X5 doesn't have the rear tailgate leg sensor even with comfort access. Neither of my X5's had it. Alan __________________
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Installed a hitch and comfort access does not work now

04-28-2017, 10:50 AM	#7
Doanster Major 627 Rep 1,181 Posts Drives: 2014 F15 Carbon Black M-Sport Join Date: Aug 2009 Location: Oregon iTrader: (0)	Thought I was in a Ford Escape forum for a minute there. __________________ A little mod here, a little mod there...
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05-01-2017, 02:12 PM	#9
flek2 Registered 1 Rep 4 Posts Drives: 2015 X5 Join Date: Apr 2017 Location: Atlanta iTrader: (0)	A bit more research And we connected a scan tool and here is what the tool told us: Attached Images
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05-01-2017, 02:30 PM	#10
Flying Ace Lieutenant General 4985 Rep 11,891 Posts Drives: G05 45e, 997.1 & 991.1 GT3s Join Date: Jul 2014 Location: SF, CA iTrader: (5)	taking a stab here in the dark for others to opine on. Could it be an FRM issue too? On past cars, comfort access issues and issues with locking has been related to FRM. __________________ 22 Phytonic/Coffee X5 45e (CoVID-free) 08 Speed Yellow 911 GT3 Sharkwerks 12 AW/Cinnamon X5d Sports Pkg (retired) 14 AW/Beige M6GC ZCP, MPE, V2 steering wheel, vorsteiner (retired) 08 SSII/Black E90 M3 (retired)
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05-01-2017, 09:37 PM	#11
spike5150 Captain 422 Rep 982 Posts Drives: 2020 X5 M50i Join Date: Jun 2015 Location: Denver Area iTrader: (0)	Did they install a wiring harness too, or just the mechanical hitch parts?
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05-01-2017, 11:45 PM	#12
TOPEC <3 Flat Four 215 Rep 754 Posts Drives: 335is LM Blue Join Date: Aug 2010 Location: Richmond B.C. iTrader: (0)	there should be a sensor within the rear bumper for comfort access for rear detection. possible the installer may have disconnected it and forgot to connect it back. __________________ 2011 335is Le Mans Blue 2016 X5 xdrive 35i Alpine White
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05-02-2017, 02:08 PM	#14
Apple Corps First Lieutenant 114 Rep 346 Posts Drives: 2018 X5 M Join Date: Jun 2011 Location: California iTrader: (0)	Kind of a "smarty pants" answer on my part - but a root cause analysis would focus on: Today i got the car to a local bike shop and they installed a tow hitch
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05-03-2017, 12:30 AM	#15
alphaod Mmmmm… 1150 Rep 2,426 Posts Drives: F15 Join Date: Oct 2011 Location: New York iTrader: (0) Garage List 2015 BMW X5 xDrive50i [10.00]	The fact that you had some biker install a hitch onto to a car is questionable. __________________ 2015 BMW X5 xDrive50i BMW CCA 509766
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07-21-2017, 05:22 PM	#18
longleggedbc Registered 0 Rep 1 Posts Drives: 2017 X5 40D Join Date: Jul 2017 Location: Melbourne, Australia iTrader: (0)	Did you get this resolved? What was the issue?
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07-08-2019, 01:01 PM	#19
nugoori New Member 0 Rep 6 Posts Drives: F10 550i / F15 X5 Join Date: Nov 2014 Location: United States iTrader: (0)	OP, have you resolved this by any chance? I am in same exact situation, please help thanks,
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09-23-2021, 12:37 PM	#21
7f15 Registered 2 Rep 1 Posts Drives: BMW X5 Join Date: Sep 2021 Location: North Carolina iTrader: (0)	Digging up an old post as a PSA. I lost CA after a hitch install. I thought it was a coding issue. Turns out I pinched the bumper aerial CA wire between the hitch bar mount and the frame resulting in “Comfort Access Limited” and CA not working. The wire was smooshed to smithereens. This in turn shorted the CA wire which matched up with the fault I saw in ISTA. Seems obvious now and this thread helped point me in the right direction. This should provide resolution and hopefully helps others. It might be a good idea to unplug the CA wire from the aerial prior to hitch install to prevent this.
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