UEM Checking and REMOVAL

Willow place · Sep 26th, 2020, 18:28

It would appear that the UEM may have a Dry joint , locking with the remote has stopped and sometimes the key only opens the drivers door (has to be relocked then unlocked to open ALL doors) What is the Procedure please of taking this component apart , this car has a Telephone which I think is also in the mirror for Speech .

oragex · Sep 26th, 2020, 18:40

I don't know if the problem is with the UEM. Try first locking/unlocking dr door three times. https://www.matthewsvolvosite.com/fo...ic.php?t=24386

reggit · Sep 26th, 2020, 19:00

Have you checked the car parked somewhere else to discount local interference?

If I remember right the entire mirror and interior light assembly unscrews from the roof, screws in mine where under the light diffuser. Disconnect the cables and it’s out.
The mirror housing splits apart, gently pry at the joint and it will unclip. The UEM is the board inside it. Once you get the board out, (mine was very stuck on double sided sticky, needed careful application of a heat gun to soften it). You’ll see a small daughter board soldered at right angles to the main one. This smaller one is the keyfob receiver, and if necessary can be swapped. The long board contains all the coding and can’t be swapped.

Willow place · Sep 28th, 2020, 16:41

Thanks for the replies , done the Key 3 times, nothing, parked over a 30 km distance nothing , looks like a dismantling job , but I am considering buying a RF tester (Cheap) just in case the problem is in the fob !

oragex · Sep 28th, 2020, 17:45

Don't forget the car battery disconnect

Willow place · Sep 29th, 2020, 16:12

Does disconnecting the battery help with this fault ? Is it just disconnect and wait for a few minutes ? Does this bring up any warnings?

Sep 26th, 2020, 18:28	#1
Willow place Senior Member Last Online: Jan 1st, 2023 17:41 Join Date: May 2017 Location: Los Finos Almeria	UEM Checking and REMOVAL It would appear that the UEM may have a Dry joint , locking with the remote has stopped and sometimes the key only opens the drivers door (has to be relocked then unlocked to open ALL doors) What is the Procedure please of taking this component apart , this car has a Telephone which I think is also in the mirror for Speech .

Sep 26th, 2020, 18:40	#2
oragex Premier Member Last Online: Jul 26th, 2021 21:24 Join Date: Jun 2013 Location: Coldnada	I don't know if the problem is with the UEM. Try first locking/unlocking dr door three times. https://www.matthewsvolvosite.com/fo...ic.php?t=24386 __________________ Several Volvo Repair Videos https://www.youtube.com/playlist?lis...ECTts0FSVSOT_c

Sep 26th, 2020, 19:00	#3
reggit Premier Member Last Online: Today 07:14 Join Date: Feb 2012 Location: Preston	Have you checked the car parked somewhere else to discount local interference? If I remember right the entire mirror and interior light assembly unscrews from the roof, screws in mine where under the light diffuser. Disconnect the cables and it’s out. The mirror housing splits apart, gently pry at the joint and it will unclip. The UEM is the board inside it. Once you get the board out, (mine was very stuck on double sided sticky, needed careful application of a heat gun to soften it). You’ll see a small daughter board soldered at right angles to the main one. This smaller one is the keyfob receiver, and if necessary can be swapped. The long board contains all the coding and can’t be swapped. __________________ 2009 Volvo V70 D5 (Polestar 225bhp) r-design 180,000 miles

Sep 28th, 2020, 17:45	#5
oragex Premier Member Last Online: Jul 26th, 2021 21:24 Join Date: Jun 2013 Location: Coldnada	Don't forget the car battery disconnect __________________ Several Volvo Repair Videos https://www.youtube.com/playlist?lis...ECTts0FSVSOT_c

Sep 28th, 2020, 16:41	#4
Willow place Senior Member Last Online: Jan 1st, 2023 17:41 Join Date: May 2017 Location: Los Finos Almeria	Thanks for the replies , done the Key 3 times, nothing, parked over a 30 km distance nothing , looks like a dismantling job , but I am considering buying a RF tester (Cheap) just in case the problem is in the fob !

Sep 29th, 2020, 16:12	#6
Willow place Senior Member Last Online: Jan 1st, 2023 17:41 Join Date: May 2017 Location: Los Finos Almeria	Does disconnecting the battery help with this fault ? Is it just disconnect and wait for a few minutes ? Does this bring up any warnings?

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