What does "SYS" mean?
Thread Starter
2nd Gear
Joined: Sep 2003
Posts: 2
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From: Bullard Texas
What does "SYS" mean?
I have a 93 that flashes "SYS" three times every 10 to 15 secs. This appears where the temperature is displayed, and has done so for the past year. A guy at Corvettes of Houston told me that it could poss mean that some wiring is bad or hooked up wrong. The two Chevy dealers hooked up the tech 2 and could not tell me anything. So far noone can! Has anyone else had this problem, and how was it fixed?!
Race Director
Joined: May 2001
Posts: 14,165
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Re: What does "SYS" mean? (hayden489)
Let me start by saying welcome to the forum!
There are several things that can cause the trouble you are having, hence the reason I gave the rather vague choice for the poll. There are several different codes that your car can set, in several different systems.
You can have ECM trouble codes which are typically accompanied by a service engine soon light. You can have ABS/ASR trouble codes and you can have CCM trouble codes which usually come along with the SYS light.
The two most common CCM codes are for a low battery and for a wiring fault, usually because of an aftermarket stereo. Since you've had it for a while the battery probably isn't it or you would have had trouble by now. There is a procedure for retrieving trouble codes from the CCM. It's not terribly complicated but I don't have my book in front of me right now. You can follow this procedure to get a trouble code, then we can look into that and see what it is.
BTW my personal experience has shown that you can get a SYS light if your courtesy lights fuse is blown. If you've got an aftermarket stereo it could likely be the culprit as well.
There are several things that can cause the trouble you are having, hence the reason I gave the rather vague choice for the poll. There are several different codes that your car can set, in several different systems.
You can have ECM trouble codes which are typically accompanied by a service engine soon light. You can have ABS/ASR trouble codes and you can have CCM trouble codes which usually come along with the SYS light.
The two most common CCM codes are for a low battery and for a wiring fault, usually because of an aftermarket stereo. Since you've had it for a while the battery probably isn't it or you would have had trouble by now. There is a procedure for retrieving trouble codes from the CCM. It's not terribly complicated but I don't have my book in front of me right now. You can follow this procedure to get a trouble code, then we can look into that and see what it is.
BTW my personal experience has shown that you can get a SYS light if your courtesy lights fuse is blown. If you've got an aftermarket stereo it could likely be the culprit as well.
Race Director
Joined: Feb 2002
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From: Honolulu, HI
Re: What does "SYS" mean? (Nathan Plemons)
The two most common CCM codes are for a low battery
before you get too worked up, replace your batter if it's old. This might save you a lot of head aches. I had this problems and that's all it was.
Pro
Joined: Aug 2002
Posts: 698
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From: Richmond VA
Re: What does "SYS" mean? (vvv90)
before you get too worked up, replace your batter if it's old. This might save you a lot of head aches. I had this problems and that's all it was.
I had sys flashing and it turned out that my battery was dying.
