SYS Light on

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Aug 11, 2011 | 09:46 PM

T-Factor

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Racer

Joined: Jun 2011

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From: Western Pennsylvania

SYS Light on

Hey Guys
I have a 1995 that I''ve owned for about 2 weeks. I noticed this evening when I went for a ride the SYS light on the dash is flashing. I did a search and it seems like an aftermarket stereo or a low battery can cause it to flash. I ran it yesterday for awhile. Then when I got in it tonight I noticed the interior light under the mirror was on, I don't think I bumped it on. I think It was on since last night. The car started right up and when driving the volts are 14 plus. It has the factory radio and never came on before so I'm hoping it was just a weak battery. Also the reserve fuel light came on do you think that would cause it? Any ideas? Will it reset itself or is there something I have to do to clear it.?

Thanks
Tony

Aug 11, 2011 | 10:11 PM

RollaMo-LT4

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Reserve fuel light should not cause the SYS to illuminate.
Since you have the factory radio, I have a hunch your battery is low.

You really can't go by the volt gauge showing 14 while driving, because that is your alternator putting that out.
The battery could still be low. Have it load tested to be sure.

I was having the SYS flashing also, and I knew the battery was in question since it was 6 years old.
Replaced the battery with a new one, and the SYS light stopped flashing.

Aug 12, 2011 | 10:27 AM

T-Factor

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Racer

Joined: Jun 2011

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From: Western Pennsylvania

Thanks for the reply I will have the battery load tested, I thought it might be the battery.

Aug 12, 2011 | 11:29 PM

a454corvette

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From: Edmond Oklahoma

You could poll the CCM to find out what the SYS lamp is being enabled for. This link tells how, and provides some info on what the code(s) retrieved mean

http://tech.corvettecentral.com/2011...trouble-codes/

Aug 13, 2011 | 12:02 AM

PLRX

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http://forums.corvetteforum.com/c4-t...s-on-dash.html

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http://forums.corvetteforum.com/c4-t...sys-light.html

http://forums.corvetteforum.com/c4-t...-sys-code.html

http://forums.corvetteforum.com/c4-t...g-in-dash.html

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Aug 14, 2011 | 03:40 PM

richauto

Instructor

Joined: Aug 2010

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From: Somers N.Y.

Quote:

Originally Posted by T-Factor

I have had the same issue with my '94. The SYS light will come on and reset. This happened right after installing a new stereo. Being that you still have a factory stereo in it , you should do a complete test of the alternator. You can have charging voltage but have excessive diode ripple. Just a thought.

Aug 14, 2011 | 03:51 PM

Illini Al

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From: Orland Park IL

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My battery was the culprit on mine. Put in a new one and it stopped showing.

Aug 15, 2011 | 06:37 PM

joeanoker

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Quote:

Originally Posted by T-Factor

I had the same issue with my 1996, its the battery. If its more than 4 years old get rid of it and that should clear up your problem. I was told that a bad battery plays havoc with computer by giving you a lot of false warnings etc. Get a GM Delco.