Kevinmacd

So my little red led went out on the key fob, replaced the battery in the key fob, led works and flashes but does not lock or unlock the doors or hood. I can open the doors manually and start the car.
I tried putting the key in the ignition turn on the ignition, not starting the car and then pressing the key fob, still not working. Tried putting the key in the door lock pressing the key fob still not working. Unlocked the door and then pressed the key fob, still no results.

Any ideas? Appreciate the feedback!

"02996ttx50

when that happened to me it was the guts were bad. had to replace so i did two new fobs same time. sucks but these things are old.

Kevinmacd

K thanks!

rmc1148

I saw a post where the guy cleaned up the inside circuits and it came back to life.

Kevinmacd

Thanks

wross996tt

try a FOB reset by putting the battery in reverse polarity for 10 seconds, then installing it properly.

"02996ttx50

^ really!? wish i'd known about that one.

Tuxiemama

Brilliant but correct

datalis

Tried reverse polarity and the FOB worked for a little bit then stopped??? Tried with a new battery and got same result...

Kevinmacd

Yup i did not have any success at all.

"02996ttx50

when all else fails, you need new fob guts, and the hours worth of ( ahem ) "labor" to re-program. may as well just do two fobs at the same time, since the innards eventually gives out on them all.

Carlo_Carrera

On one of my keys the solder on one of the battery power connection to the circuit board came loose and was giving me inconsistent functionality. I re-soldered it and now it is fine.

"02996ttx50

congratulations! that makes you ( by my estimate ) a 1 %'er.

Kevinmacd

Whats so ironic is that quit a few including myself have had this issue by just changing out the battery!

autobonrun

Looks like this post is over a year old but here is what I would try before I changed out the FOB internals.

I don't know if changing a FOB battery has the same impact on the software as when it puts itself into a sleep mode after not driving for 4-5 days, but I'd test the same process for restoring it. That is, try locking and unlocking the door using the key. Then immediately, before opening the door, try locking and unlocking with the FOB. At least no alarm that way. If it doesn't work, at least it costs nothing to try.