SYS Flashing On Dash...What Does it mean?
Thread Starter
Advanced
Joined: Oct 2008
Posts: 65
Likes: 1
From: The Colony Tx
SYS Flashing On Dash...What Does it mean?
Today I noticed that my mpg display on the digital dash was flashing sys then back to MPG and so on. Never noticed it before. What is it telling me if anything? I looked at my code refernces and didn't see anything to explain. Thanks!
Intermediate
Joined: Sep 2007
Posts: 37
Likes: 0
Sys Flashing
Happens to me after car sits for a long winters sleep.....battery is low on charge. Drive it around for awhile and it will go away on it's own. I now use a Battery Tender and have no issues. Might be worth investing in. Check it out on ebay!
Race Director
Joined: Jul 2007
Posts: 15,115
Likes: 283
From: Salt Lake City Utah
2020 C3 of the Year Finalist - Unmodified
2019 C3 of Year Finalist (stock)
A new battery took care of it for me.
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 bad
Intermediate
Joined: Mar 2009
Posts: 48
Likes: 0
From: Lancaster County PA
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Le Mans Master
Joined: Sep 2003
Posts: 5,874
Likes: 0
From: Littleton CO
"SYS" doesn't directly mean that the battery or charge is bad. It means that the CCM has a stored trouble code. A weak battery (I presume) can cause the computer to sense a malfunction in one or some of the systems it controls, so that is often seen as a root cause and easy fix.
Click this link and check your PM's.
Click this link and check your PM's.
Pro
Joined: May 2006
Posts: 637
Likes: 0
Look at this one, http://forums.corvetteforum.com/c4-t...ht-switch.html post #8
Racer
Joined: Feb 2009
Posts: 251
Likes: 0
From: pa
Your problem could be the switch in the door(s).
Look at this one, http://forums.corvetteforum.com/c4-t...ht-switch.html post #8
Look at this one, http://forums.corvetteforum.com/c4-t...ht-switch.html post #8
i think its in the ccm? i did have the battery out all winter !!!
i'm going to try the scan,
LS/MFT
Joined: Jun 2000
Posts: 5,874
Likes: 0
From: Cary IL
St. Jude Donor '09-'10-'11-'12
While a low battery can cause a SYS display, that's not a good diagnosis. I've posted a Word document here which explains how to read CCM and ECM codes through your digital display. I'll be posting a PDF soon and will provide the link.
The PDF is here.
The PDF is here.
Last edited by Vette73; Mar 26, 2009 at 12:39 PM.
Racer
Joined: Feb 2009
Posts: 251
Likes: 0
From: pa
Thread Starter
Advanced
Joined: Oct 2008
Posts: 65
Likes: 1
From: The Colony Tx
Ok...I believe it was the battery. My son did not shut the passenger door thus draining the battery. I pulled the the codes and found a low voltage code. I then cleared the code and put the battery on a slow charge overnight. I ran it for an hour after work yesterday and the SYS did NOT reappear. I went ahead and pulled codes again after and found none. I really appreciate all the great support and info that you guys provide when help is needed!!! Hope you have a great weekend.
Pro
Joined: May 2006
Posts: 637
Likes: 0
Ok...I believe it was the battery. My son did not shut the passenger door thus draining the battery. I pulled the the codes and found a low voltage code. I then cleared the code and put the battery on a slow charge overnight. I ran it for an hour after work yesterday and the SYS did NOT reappear. I went ahead and pulled codes again after and found none. I really appreciate all the great support and info that you guys provide when help is needed!!! Hope you have a great weekend.
That´s so great with internet, either one can help someone else or you might get help, tips, ideas and the fun part is, you get it for free.
With a little bit of luck you can save a bunch of money too, before you race to the mechanic.
