What does "sys" mean `on 94???
Thread Starter
Le Mans Master
Joined: Oct 2001
Posts: 5,302
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From: Atlanta GA
What does "sys" mean `on 94???
I test drove a 94 w/ 37k miles today. I kept on flashin a "sys" indicator on the digital readout where the gas mileage appears. What does "sys" mean? Is it bad? The car ran really well. :confused: :cheers:
Melting Slicks
Joined: Jul 1999
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From: Olive Branch (Memphis suburb) MS
Cruise-In II Veteran
Re: What does "sys" mean `on 94??? (dtorc4)
Darrin, the SYS indicates the CCM (not the ECM, engine control module) has detected a fault. Two of the most common reasons are the CCM has seen the ignition voltage out of range(usaully just a battery going) or the radio head unit has been changed to an aftermarket unit that has a different resistance in the backlight dimmer circuit which the CCM takes to be an error(which can be fixed easily).There are a few other things that can set the SYS, but they don't effect the engine. :crazy:
[Modified by Ramrod92, 11:49 PM 11/9/2001]
[Modified by Ramrod92, 11:49 PM 11/9/2001]
Thread Starter
Le Mans Master
Joined: Oct 2001
Posts: 5,302
Likes: 2
From: Atlanta GA
Re: What does "sys" mean `on 94??? (dtorc4)
Thanks man, I thought it was something more serious than that. And yes, the radio has been replaced by some POS Jbl cd player. :cheers:
Melting Slicks
Joined: Jul 1999
Posts: 2,875
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From: Olive Branch (Memphis suburb) MS
Cruise-In II Veteran
Re: What does "sys" mean `on 94??? (dtorc4)
Check this out http://forums.corvetteforum.com/zerothread?id=139694 :cheers:
Race Director
Joined: Oct 1999
Posts: 13,298
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From: Somers NY
Re: What does "sys" mean `on 94??? (Ramrod92)
Two of the most common reasons are the CCM has seen the ignition voltage out of range(usaully just a battery going) or the radio head unit has been changed to an aftermarket but they don't effect the engine. :crazy:
[Modified by Ramrod92, 11:49 PM 11/9/2001]
[Modified by Ramrod92, 11:49 PM 11/9/2001]
Today at Englishtown I ran the fan more than usual, & I also noticed a SYS when I turned on the ignition...
Do you think this was because it sensed the battery had a big drain ? Even though the fan switch I have is not running through the computer..
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Team Owner
Joined: Apr 2001
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From: Dallas TX
Re: What does "sys" mean `on 94??? (Red96Coupe)
yep.. I've had the SYS both ways. First because of the aftermarket radio.. I got that fixed with 2 resistors.. then next I got it a few months later because my battery was dying. No more SYS .. for now
Race Director
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From: Weirsdale (outside of Ocala) Florida
Re: What does "sys" mean `on 94??? (Red96Coupe)
Can you email me at ocalaguy@aol.com on how you wired your fans. I want to do the same thing on my '96. I can not get my fans to come on without turning on the ac fan. I hate that with the top down. I have had the fans worked on 3 times now and they still don't work.
Thanks,
Jim
Thanks,
Jim
Melting Slicks
Joined: Jul 1999
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From: Olive Branch (Memphis suburb) MS
Cruise-In II Veteran
Re: What does "sys" mean `on 94??? (Red96Coupe)
John, that is probably what happened. When the battery voltage drops below a set number the sys will set. I'm not up on the OBDII stuff, so I'm not as sure about how it works, but on the some of the OBDI cars a code 28 will set when a manual fan switch is used. I think Chris (Vette92) had this happen. :crazy:
Race Director
Joined: Oct 1999
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From: Somers NY
Re: What does "sys" mean `on 94??? (Ramrod92)
John, that is probably what happened. When the battery voltage drops below a set number the sys will set.
Ransome.. thanks, I have a new battery, my old one was ok, but being almost 5 yrs old I thought it best to replace it..
Next week is our last week of racing this year, but now that I know that, I'll just be more aware of how much I run the fans with the motor off..
Team Owner
Joined: Mar 2001
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From: Boston, Dallas, Detroit, SoCal, back to Boston MA
Re: What does "sys" mean `on 94??? (Red96Coupe)
Sounds like your problem is with the stereo
BTW thanks for the heads up ( no pun inteneded :D )
a Manual Fan Switch will do it to.
My Mid-America kit actually said do in the instructions.
But I also needed to replace my battery, had to have it jump started twice! :mad
I put an Optima in it and it's been fine since ( need knock on wood icon )
BTW thanks for the heads up ( no pun inteneded :D )
a Manual Fan Switch will do it to.
My Mid-America kit actually said do in the instructions.
But I also needed to replace my battery, had to have it jump started twice! :mad
I put an Optima in it and it's been fine since ( need knock on wood icon )
Race Director
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Re: What does "sys" mean `on 94??? (dtorc4)
Been there, had the problem when I replaced my stereo. You CAN fix the problem with a 12v LED as well, but I don't remember off the top of my head which wires you connect it to.
