Security Light On
Drifting
Joined: Jul 2006
Posts: 1,857
Likes: 106
From: Sloatsburg NY
Oldtimer
Pull the codes and then post what shows up.
Here is a link for owner manuals ( I have a better one but can't locate it right now).
Good luck
found it ==http://www.corvetteactioncenter.com/specs/c5/2004/2004corvette.pdf
Good luck
found it ==http://www.corvetteactioncenter.com/specs/c5/2004/2004corvette.pdf
Last edited by Sonny71; Jul 29, 2014 at 05:41 PM. Reason: update
Thread Starter
Intermediate
Joined: Jul 2005
Posts: 28
Likes: 0
Sonny71,
Pulled the codes and there're several. Without listing all, here are the modules; PMC. BMC. LDCM and RDCM. No other modules has codes.
I've only had the vette for a few months so I do not know any of the past history.
Thanks for the info.
Pulled the codes and there're several. Without listing all, here are the modules; PMC. BMC. LDCM and RDCM. No other modules has codes.
I've only had the vette for a few months so I do not know any of the past history.
Thanks for the info.
Pro
Joined: Apr 2012
Posts: 569
Likes: 19
From: South Shore, KY
Try another key or buy a new key. As the pellet wears on the key this can happen. It caused my car to not start a few times because there wasn't good contact with the key pellet. I bought a new key and it never happened again.
Melting Slicks
Joined: Jul 2013
Posts: 2,012
Likes: 23
From: Anaheim CA
Originally Posted by got-20z
Try another key or buy a new key. As the pellet wears on the key this can happen. It caused my car to not start a few times because there wasn't good contact with the key pellet. I bought a new key and it never happened again.
Pro
Joined: Apr 2012
Posts: 569
Likes: 19
From: South Shore, KY
When my security light would come on and stay on while driving that was my issue. The worn key and pellet caused the light to come on and a few times after I would get out of the car and get back in and try to start it, it wouldn't do anything. Then after about 10 minutes, it would start. A new key fixed it.
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Melting Slicks
Joined: Jul 2013
Posts: 2,012
Likes: 23
From: Anaheim CA
When my security light would come on and stay on while driving that was my issue. The worn key and pellet caused the light to come on and a few times after I would get out of the car and get back in and try to start it, it wouldn't do anything. Then after about 10 minutes, it would start. A new key fixed it.
Le Mans Master
Joined: Sep 2013
Posts: 8,900
Likes: 1,074
From: Wisconsin
Drifting
Joined: Jan 2012
Posts: 1,883
Likes: 76
From: Portland OR
Le Mans Master
Joined: Sep 2013
Posts: 8,900
Likes: 1,074
From: Wisconsin
I picture a bunch of GM engineers sitting at a table trying to come up with a number. A reasonable guy suggests 5 to 10, but his supervisor wants more. Much more. That will bring the cars in for more service calls. Many more.
Team Owner
Joined: Jul 2006
Posts: 22,200
Likes: 4,187
From: Kannapolis NC
I'm sure one of the considerations was how many times a thief might try with each key value before giving up. I'm sure it wasn't advertised that 40 was the magic number. It is, after all for security.
Burning Brakes
Joined: Dec 2010
Posts: 1,151
Likes: 190
From: SoCal
I had this same problem on my 04. If you think the key is "too worn" you can test the resistance across the key's resistor (the "chip") Click here for DIY. Once you know that you can go to any quality locksmith, buy the correct number and get it cut for about $20+.
I also cleaned my ignition switch using This DIY from Bill Curlee. This ultimately fixed the problem for over 4 years and counting.
I also cleaned my ignition switch using This DIY from Bill Curlee. This ultimately fixed the problem for over 4 years and counting.
Melting Slicks
Joined: Jul 2013
Posts: 2,012
Likes: 23
From: Anaheim CA
(And no, they didn't advertise that number, but they did put it in the FSM...pretty sure a thief could look it up if it mattered.)
Pro
Joined: Feb 2014
Posts: 536
Likes: 2
From: Brisbane Queensland
Forty is the number that shows up most often in both the Old and New Testament. It represented a generation back in the day which was considered a long time. Perhaps the engineer who devised the "40 successful startups" was religious. Please understand this is just a theory I came up with over breakfast and may or may not be the complete truth.
Tech Contributor
Joined: Dec 2003
Posts: 19,384
Likes: 87
From: Horncastle Lincolnshire, England
2023 C5 of the Year Finalist - Unmodified
Forgive me if I missed something earlier as I haven't had time to go through all the posts.
The way the system works is when you put the key into the ignition the computer checks the resistance in your chip on your key. If it gets the right answer it allows fuel to flow and the engine starts. You geta security light until the chip makes contact.
This used to be a problem a few years ago but there dont seem to be as many examples recently.
Things to check:
Try the spare in case the primary key has a chip problem.
Clean the key giving the problem to make sure the resistor is being read.
Squirt electronics cleaner into the barrel to clean up those contacts (probably wont work).
If you hang heavy stuff from your key ring take it off. If you have a worn barrel it may be causing the chip to lose contact. This often means the car starts OK but the security light comes on once the car is going.
If all that fails you can cut a new key but find out which resitor you need
If all still fails you're into rebuilding or replacing the ingnition switch in line with Bill Curlee's advice.
HTH
The way the system works is when you put the key into the ignition the computer checks the resistance in your chip on your key. If it gets the right answer it allows fuel to flow and the engine starts. You geta security light until the chip makes contact.
This used to be a problem a few years ago but there dont seem to be as many examples recently.
Things to check:
Try the spare in case the primary key has a chip problem.
Clean the key giving the problem to make sure the resistor is being read.
Squirt electronics cleaner into the barrel to clean up those contacts (probably wont work).
If you hang heavy stuff from your key ring take it off. If you have a worn barrel it may be causing the chip to lose contact. This often means the car starts OK but the security light comes on once the car is going.
If all that fails you can cut a new key but find out which resitor you need
If all still fails you're into rebuilding or replacing the ingnition switch in line with Bill Curlee's advice.
HTH
Team Owner
Joined: Jul 2006
Posts: 22,200
Likes: 4,187
From: Kannapolis NC
But, it does let you know for 40 tries that someone tried the wrong key. I believe it can be cleared with the DIC, but haven't cleared that specific code. I also understood that if the security light stayed on the car wouldn't run, sounds like that is not the case here. I'm not sure what the value of the vats system is if it lets the car run with the wrong key.
