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Old 12-18-2008, 10:37 PM   #1
C599
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Default Legendary Problem Solved....

Must be Xmas time. I figured out the issue with the famous key fob problem of it loosing sync with the cars. Turns out it's a problem with one of the chips coming detached from the circuit board.

When you open the key fob with the board facing you, look near the top right hand corner. There's a rectangle shaped chip, check the prongs. I checked mines both times when each of my remotes wouldn't keep sync with the car, each time it was loose.

I resolder it or you can even use permanent glue between the chip & board to hold it firm if you're not comfortable with soldering. Make sure the prongs have a good connection. Sorry that I haven't taken any pics, but it's pretty much straight forward.

Yeah, I know my atar is big, but I put it in at normal size & it keeps blowing up to the huge size. Yeah, I've resized it, lower resolution. I'll play with it some more later when time permits.
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Old 12-19-2008, 04:15 PM   #2
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That would make sense... I just took mine apart and studied the circuit. It appears that one of the battery (+) legs goes up to the two legs on that chip, through the chip, then down to two pins on the main chip.

Maybe that is a memory feature of some kind? I think the FOB's have a rolling code, so maybe this is what keeps track of the codes as it rolls over?!?!

I just took my FOB down to the lab and hit those points with some solder. If it works, I'll report back.

Thanks for the tip.

Mark
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Old 12-19-2008, 07:55 PM   #3
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TOUCHDOWN!

I have had no problems with my FOB since this fix. Thanks again for posting this information!

Mark
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Old 12-30-2008, 10:55 PM   #4
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I took a picture of the FOB and the six points that that I re-soldered. The points are marked with red dots.

Click the image to open in full size.

You need a small tipped iron to get down on those points... but it's better than buying a new FOB.

Mark

Last edited by Fasthotrod; 01-21-2009 at 12:24 AM.
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Old 12-31-2008, 08:07 AM   #5
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Great info thanks
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Old 01-20-2009, 11:37 PM   #6
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Default Cool info

Guys Thanks
I just bought a 2000 coupe key fob never worked. I will check when I get home this week

Chuck
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Old 02-14-2009, 10:21 PM   #7
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Awesome
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Old 02-15-2009, 12:17 AM   #8
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great find !!!
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Old 02-15-2009, 12:21 AM   #9
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XLNT! It just goes to show you that you learn something new every day

Thanks,Matt
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Old 02-15-2009, 07:01 AM   #10
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Good info

Chuck
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Old 02-15-2009, 09:44 AM   #11
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thanks for sharing
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Old 02-17-2009, 11:10 PM   #12
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I'll be damn if I didn't just receive my new remote today then read this post and found the same thing. Oh well, I have a brand new spare now.
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Old 03-09-2009, 11:53 AM   #13
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Default This really works.

I had been having problems with my 1999 fob for some time. Replaced the battery and still no improvement. About every day I had to resync the fob in order to get it to work. After reading this post, I opened the fob and examined the chip connections but could not see that they were actually loose. Some days later I decided to go ahead and try the repair described in this post. The fob now works perfectly. Not only does it retain sync, but even the slightest tap of the fob buttons brings an instant response. If you are experiencing problems with your older key fob, give this a try.
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Old 03-09-2009, 01:04 PM   #14
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C599 - great info - I'm going to give it a try, thanks for the post.
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Old 03-09-2009, 01:14 PM   #15
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This needs to be a sticky,,,right along with the dim/dark HVAC display fix!! Have to remember this one too!! I have so many bookmarks now that I can't find the ones I looking for now!!
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Old 03-09-2009, 05:06 PM   #16
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If anyone ends up with an extra 97-99 (passive mode) fob over this deal, I'd be interested in it.
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Old 03-09-2009, 05:10 PM   #17
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No way in hell could I solder that. I don't have the steadiest of hands.
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Old 03-09-2009, 06:51 PM   #18
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God, I love this forum.... ( I also love saving $$$$$)
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Old 03-09-2009, 07:24 PM   #19
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Quote:
Originally Posted by IrishMac View Post
No way in hell could I solder that. I don't have the steadiest of hands.
It's actually quite easy. It took me about 2 minutes to do it. It is easier if you first remove the rubber gasket surrounding the circuit board. Just use a sharp tip soldering iron and barely wet the tip with fresh solder before touching the 4 chip connection point.
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Old 03-09-2009, 09:28 PM   #20
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Would the glue actually work the same or is it way better to solder it?

Thanks so much!

Just curious because a super glue tip is perfect for that tight spot...

Donnie
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Old 03-09-2009, 09:28 PM
 
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