Legendary Problem Solved....
Instructor
Joined: Mar 2012
Posts: 143
Likes: 1
haha. Im sure it could work if it has the same cold solder issue. Step one, get a new battery step 2 touch your iron to all of the contacts, step three, put it back together and resync.
Intermediate
Joined: Jun 2012
Posts: 27
Likes: 0
Well I changed the battery the first day, second I'm an electronics tech and put it under the magnifier and used my volt meter and everything seem secure and got a good signal so I don't know what the problem is and might just buy a new one with a trunk button anyways.
Instructor
Joined: Mar 2012
Posts: 143
Likes: 1
Well I changed the battery the first day, second I'm an electronics tech and put it under the magnifier and used my volt meter and everything seem secure and got a good signal so I don't know what the problem is and might just buy a new one with a trunk button anyways.
Racer
Joined: Aug 2005
Posts: 293
Likes: 11
Useless
Unless your are soldering expert, with a capitol E, forget it. No way to do this at the small level it has to be accomplished. Save your money on soldering irons and stuuff. Go buy a new one or live without it.
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Intermediate
Joined: Sep 2012
Posts: 48
Likes: 0
I have same FOB problem for my 2000 corvette just purchased this year. No apparent problems inside FOB however it will lose sync after 48hrs of inactivity. Everything fine after resync. FOB has new battery. Dealer has provided info as follows from service manual.
Each transmitter has a unique vehicle access code that changes every 5 seconds. After programming the transmitter, the receiver will update this code every 5 seconds to match the code programmed in the transmitter. The transmitter may get out of sync if any of the following occurs:
- transmitter battery is disconnected
- vehicle battery is disconnected
- transmitter and vehicle are separated for 2 weeks or more
- receiver is disconnected
This suggests that there is ongoing syncronization going on between transmitter and vehicle (point 3) which seems strange to me. Both units are incrementing the code every 5 seconds yet they are getting out of sync. I was going to order a new FOB but maybe the problem is with the receiver (weak signal?). I only have one FOB therefore cannot rule out which unit is to blame. Previous owner gave up and used key only.
Each transmitter has a unique vehicle access code that changes every 5 seconds. After programming the transmitter, the receiver will update this code every 5 seconds to match the code programmed in the transmitter. The transmitter may get out of sync if any of the following occurs:
- transmitter battery is disconnected
- vehicle battery is disconnected
- transmitter and vehicle are separated for 2 weeks or more
- receiver is disconnected
This suggests that there is ongoing syncronization going on between transmitter and vehicle (point 3) which seems strange to me. Both units are incrementing the code every 5 seconds yet they are getting out of sync. I was going to order a new FOB but maybe the problem is with the receiver (weak signal?). I only have one FOB therefore cannot rule out which unit is to blame. Previous owner gave up and used key only.
Instructor
Joined: Mar 2013
Posts: 170
Likes: 19
From: Aztec, NM
It would be way better to solder it. Since I just got my vette and the key fob battery is dead, I'm gonna take a look at this before I grab a new battery.
Pro
Joined: Feb 2011
Posts: 565
Likes: 0
From: Broussard Louisiana
Actually, I think the passenger side door not opening on first activation is pretty standard fare for fobs. It may be a safety feature (for all I know), but I noticed that with my 2000 Vette, the wife's 07 Azera and my 06 F-150, the passenger side only unlocks if I hit the fob at least twice.
Heel & Toe
Joined: Mar 2013
Posts: 24
Likes: 0
From: Owenton ky
So p1&&3d at myself!!!! Took my fob apart that wouldn't work, cleaned throughout, put in New battery for good measure, and soldered top four connections on the left hand side, went out side and reset and guess what? It worked! But it was slow, and I had to press extremely hard, so I thought well I'll fix the remaining of the 16 connections, I was doing well till a glob of solder fell in between two of the contacts and i couldn't remove their new connection. Well carp, reassembled the fob, went outside and nothing! Oh well I guess nothing ventured nothing gained. Still steamed though
Safety Car
Joined: Dec 2011
Posts: 4,704
Likes: 239
From: Redondo Beach CA
I am glad my fob works well, that soldering looks like a higher skill set than my own
What I was wondering was the possibility of dipping the circuit board in epoxy to prevent future connection failures, and avoid loose circuit connections
I know this "epoxy circuit board " is used in military spec stuff, but have no working knowledge of any way to do this, or if would destroy everything or even if is it a good idea
Any ideas?
What I was wondering was the possibility of dipping the circuit board in epoxy to prevent future connection failures, and avoid loose circuit connections
I know this "epoxy circuit board " is used in military spec stuff, but have no working knowledge of any way to do this, or if would destroy everything or even if is it a good idea
Any ideas?
Pro
Joined: Feb 2012
Posts: 737
Likes: 300
From: Pendleton Indiana
When I bought my Vette last spring the original owner gave me both original remotes, but said one wasn't working. I didn't worry too much about it because the other was good and I'm the only one that drives it. Saw this post and figured I'd take a peak inside. the solder joint exactly like in this picture on mine was loose. Resoldered it and resync with car and it works perfect now!!
It was this same joint....
Thanks!!!!
Tyler
It was this same joint....
Thanks!!!!
Tyler
Cruising
Joined: Nov 2011
Posts: 11
Likes: 0
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.
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.
Le Mans Master
Joined: Mar 2002
Posts: 8,466
Likes: 51
St. Jude Donor '17
I haven't had time to be on in quiet a while. Will this problem cause the car to ack like it is starting then not. My 2004 runs for a quick second then shuts off. Does it with both keys, dealer told me it could be the computer has lost the key signal. I don't want to take it to the dealer. Can anyone help?
pull your dtc codes.
Clean the chip on your key.
Change your sparkplugs or fuel pump?