Chevy-SS

2008 3LT A6 Coupe here. I left #2 FOB next to car in garage. FOB battery died quickly. I replaced with new battery, but it died quickly also. So then I got curious and did a little test with ANOTHER brand new CR2032 battery.

Here is a brand new battery, installed October 19. The #2 FOB was then placed on shelf about 6 feet away from the driver door. Voltage of new battery is 3.28....


And here's the same battery today, October 29. It is basically stone dead at 1.04v....



Something is rapidly depleting these batteries. This seems to indicate that the FOB and the car communicate constantly when the FOB is within a certain range?? Does anyone know the actual range? And what type of constant communication is going on?

Thanks......

Vette_DD

No, it doesn't do that. You've got something wrong with the fob. It has a continuous circuit like a button that's pressed down all the time. Too many C6 owners can tell you that doesn't happen.

EVRose

Try that same experiment with a different FOB. It should not drain the battery just because its near the car.

Chevy-SS

OK, thanks guys. I am gonna try another experiment with the 'defective' FOB, but this time I will leave the 'defective' FOB far away from the car. Setting it up right now. Initial battery voltage reading is at 3.02 for this test.

Thanks, Dave

carpe dm

I would bet on the "constant communication" answer.

Vette_DD

Without looking, I'm going to bet that at one time, you owned a C4.

Although I owned one, I was not aware that supposedly they did.

That may be the answer, but it's not supposed to happen with C6s.

Sunnyvale Dave

You are doing the experiment correctly now.

owc6

Keep us posted as to your findings.

lisa

Chevy-SS

I will post results, for sure. This particular FOB (when placed within 6 feet of car) has consistently run the FOB battery down in about 10 days, so it will be interesting to see what the voltage is in 10 days. I will be sure to NOT use that FOB at all - it will just sit. It's about 30 feet away from the car now, with a few walls in between.....

EVRose

If you didn't drive the car for that same 10 days you would probably have had a dead car battery too if they are communicating constantly.

PatriotZ

Good thread...look forward to the results...I have my FOB about 20 feet away....

CO Lightfoot

Does that mean you have other C6 fobs that don't eat batteries?

Anyway, if you don't have a 2nd fob, get one. Shop around for best price. You can program it yourself... probably want the long procedure: http://forums.corvetteforum.com/c6-c...tructions.html

BTW, even with a dead battery, your fob should work in the glovebox slot.

FortMorganAl

I was going to suggest other tests that would prove the car and FOB only communicate when you initiate an action but then realized that they might not give the normal results because you have a faulty FOB. Most likely a stuck button.

Please report your results when you find the battery dead with the latest test so that no one else gets misinformed thinking that the car and FOB communicate continuously. They do not.

eboggs_jkvl

with FMA!

Elmer

Chevy-SS

I absolutely do NOT want to misinform anyone or spread false information. I'm a big fan of accurate information. That's why I am carefully measuring voltages. I will be sure to post results in 9 more days. Thanks gents!

eboggs_jkvl

November 8th is 9 days! 2 more days of the "test"!

2k Cobra

With my last Corvette, I had a problem with the Fob batteries giving up within one to two days.

Changed them again and the same thing happened.

Ran down to store and bought fresh/new/major brands, and viola, no more problems..

Good luck with the test. We'll be watching,, 2k

vertigogo

Not related to the problem here, but I see so many people on this forum spelling the word in all-caps as FOB, when it is actually just a normal word: fob. Like a watch fob.

TripleplayZR1

Coincidently when I asked a very knowledgeable service manager and his shop foreman at a GM dealership about storage, he advised me to remove the batteries from the key fobs during storage. His reasoning was that the computer is always searching. Take it or leave it.

owc6

I'm admittedly curious about the outcome of the test.

Mostly, because when I go out to the garage with the fob(s), my '05 will occasionally start making servo-type noises while my '09 never does. Without touching either car.

The OP doesn't state what year the car is (that I saw, anyway).


lisa