Flashing SYS
Thread Starter
7th Gear
Joined: Jul 2008
Posts: 7
Likes: 0
Flashing SYS
I just picked my 'vette up from installing a door ajar switch and now where my coolant temp reads on the digital display every 45 secs or so it flashes SYS for about 3 secs and then stops.
any help is appreciated!
any help is appreciated!
Le Mans Master
Joined: Sep 2003
Posts: 5,874
Likes: 0
From: Littleton CO
One of the car's computer modules has a trouble code stored.
http://www.corvettebuyers.com/c4vettes/codes.htm
http://www.corvettebuyers.com/c4vettes/codes.htm
Le Mans Master
Joined: Sep 2003
Posts: 5,874
Likes: 0
From: Littleton CO
I was in the middle of editing to add something like this. It's the first thing to check, since it is simple and common, but people often reply with this and fail to add that "SYS" does have some meaning.
Team Owner
Joined: Aug 2005
Posts: 34,988
Likes: 515
From: Riverside County Southern California
Co-winner 2020 C4 of the Year - Modified
2018 Corvette of Year Finalist
2017 C4 of Year
2016 C7 of Year Finalist
St. Jude Donor '09 thru '20
Your battery is going south. It is likely that it is not charging at it's capacity.
You need a new battery
You need a new battery
Le Mans Master
Joined: Sep 2003
Posts: 5,874
Likes: 0
From: Littleton CO
The link tells you how to find out what that code is. A factory service manual will, in turn, tell what that code means. I'd offer to look it up, but I don't have your year.
There is a similar page at that site with a some more info. I do know that they are not 100% correct for 1996, and thus maybe not for other model years either, but for both of us it should be good enough to cover most of what we need.
http://www.corvettebuyers.com/c4vettes/ecm.htm
Now... the advice to charge and check the battery is good as a first step and frequent fix, but I will say that I have had "SYS" flashing at me since I bought the car, through good batteries and bad. In my case, it is an aftermarket stereo for which the computer doesn't see a dimming circuit, and I haven't bothered to do the fix. There are a host of other things which are monitored similarly.
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Instructor
Joined: Jan 2008
Posts: 245
Likes: 0
From: McKinney Texas
Depending on your driving habits and many other factors the battery may be draining more over night then the generator can charge while driving, particularly in short trips.
3 years could be a long time for some batteries... just double check to be sure before you spend $$$ at a shop for diagnostics.
Do you have an aftermarket sterio??? That is what is causing mine to flash SYS.
Instructor
Joined: Sep 2002
Posts: 156
Likes: 1
From: North Aurora IL
Actually there are a few things that can cause this. Disconnecting your radio which was stated earlier will cause this. So will disconnecting yuor alrm chime for lights left on or keys in ignition. I'm pretty certain there are many other connections if left unconnected will cause this. Make sure to check all connections on any modules or switches you might have disconnected.
