Is it my key fob????

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Feb 21, 2007 | 09:27 PM

alshirey

Thread Starter

Instructor

Joined: Mar 2006

Posts: 156

Likes: 0

From: Whitesboro TEXAS

Is it my key fob????

I have a 2000 vert. Just recently my keyless entry (the fob), is losing it's memory. Has anyone had this happen, and is it the fob or something with the receiver in the car that is losing it. I can reprogram and it will work for a day or two, then nothing. I'll reprogram it again and it will work for a day or two. I put a new battery in it, so I know the battery isn't an issue, unless I got a bad battery.

I know 99% will reply to this thread....I'll try to come back to check. But, If you know what's going on, please send personal email.

Thanks,
Allen (alshirey71@hotmail.com)

Feb 21, 2007 | 09:37 PM

Jeffs FRC

Burning Brakes

Joined: Nov 2004

Posts: 1,226

Likes: 3

From: Lakemoor IL

Stand next to the car and hold the lock and unlock button at the same time until the car beeps. I think this reprograms them and it worked great for me when mine started to lose memory.

Feb 22, 2007 | 12:52 PM

DAWS C5

Drifting

Joined: Oct 1999

Posts: 1,712

Likes: 7

From: Sunnyvale CA

The fobs have weak contacts to the battery. When you bang it in your pocket or against a wall, it momenarily loses battery power and must be resynced. Carefully pry up the battery contacts so they put more pressure on the battery. Bet this fixes it!

Feb 22, 2007 | 03:03 PM

Bill Curlee

Tech Contributor

Joined: Dec 1999

Posts: 32,910

Likes: 2,402

From: Anthony TX

CI 6,7,8,9,11 Vet

St. Jude Donor '08

You need to read and post your DTC codes. If your fob is having issues, the DTC's will help diagnos the problem.

This is the absolute best C5 Diagnostic Trouble Code (DTC) web site!!!
*
http://www.corvettedoctor.com/Code_Main.html
*http://www.corvettedoctor.com/index.html

www.corvettedoctor.com

Go to “technical data base” and then to “Corvette ECM Computer Codes”. Then select your year car. Read the instructions and then scroll down to the "READ MORE" window to view the code definitions.\

Here is another very good site:

http://www.obd-codes.com/trouble_cod...d-ii-codes.php
*
*Make sure to include the H or C suffix!!

How old is your 12 VDC main battery? When the car is started in the morning, the starter draws 300-400 amps. High current will cause the battery output to drop low (sometimes below 9 VDC) and the fobs will lose sync. The next time it happens press and hold the lock and un-lock buttons at the same time and wait for the horn to toot. That is a RE-SYNC procedure and should get you back in sync.

Feb 22, 2007 | 04:52 PM

Oldvetter

Le Mans Master

Joined: Feb 2002

Posts: 6,937

Likes: 21

From: Waldorf MD

This is just to add that sometimes the fobs just go bad. I had one that began losing synch. I replaced the battery and bent the battery contacts. It still continued to lose synch.

I then started using another fob, no problems. Sometimes these fobs just go bad.

Feb 23, 2007 | 12:27 PM

bighank

Melting Slicks

Joined: Jul 2006

Posts: 2,332

Likes: 31

From: Silver Spring MD

key fob

Had 2 of them go south. Got replacements on fleebay. 97 - 2000 cost about $60 2001 and above are much cheaper but won't work on older C5s

BIGHANK

Feb 23, 2007 | 02:35 PM

white90conv

Burning Brakes

Joined: Nov 2002

Posts: 807

Likes: 21

From: Los Altos CA

Quote:

Originally Posted by DAWS C5

I think this can be a problem. I dropped mine a couple of times and it lost sync and I suspect that it was the battery contacts. The contacts must contact both the battery and the circuit board.

Feb 23, 2007 | 02:37 PM

trojjan

Racer

Joined: Jul 2005

Posts: 368

Likes: 0

From: ormond beach/ Simcoe florida / Ontario

I had the same issues last year.listened to all the solutions .Finally replaced the fobs and presto no more problems.

I was told by a GM guy that its a regular problem.My dealer actuall stocked several fobs.

trojjan