"sys" error- chip related?
Thread Starter
Melting Slicks
Joined: Jul 2004
Posts: 3,277
Likes: 32
From: Mission Viejo California
"sys" error- chip related?
Hi guys. I've been working on the car off and on over the past year. Basically, the old data on the chip got corrupted and the engine temp/enrichment factor was way off. It would cause the car to run crazy rich once warm to the point that it would die.
I just re burned the chip using my original files. The car won't start and I am seeing "sys" on the dash. I can't even run it to run datamaster to see what's going on.
Anyone have any ideas on trouble shooting this?
here's some specs
383 lt4
moates ecu prom adapter
tunercat software
40 psi fuel at the rail
good battery voltage
verified the chip is in the correct direction (with the dimple on the chip away from the silver handle on the moates adapter)
I just re burned the chip using my original files. The car won't start and I am seeing "sys" on the dash. I can't even run it to run datamaster to see what's going on.
Anyone have any ideas on trouble shooting this?
here's some specs
383 lt4
moates ecu prom adapter
tunercat software
40 psi fuel at the rail
good battery voltage
verified the chip is in the correct direction (with the dimple on the chip away from the silver handle on the moates adapter)
Team Owner
Joined: Sep 2003
Posts: 25,365
Likes: 2,731
I always thought a "SYS" display was a quick reference to generally a battery problem. It's certainly not an ECM related error I'm quite sure.
I believe I've seen people mentioning just disconnecting battery for a short "rest" will make it go away also.
I believe I've seen people mentioning just disconnecting battery for a short "rest" will make it go away also.
Thread Starter
Melting Slicks
Joined: Jul 2004
Posts: 3,277
Likes: 32
From: Mission Viejo California
I'll give it a try!
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
Try the paperclip method for pulling error codes:
http://forums.corvetteforum.com/1574918379-post18.html
http://corvettephotographs.com/c4vettes/codes.htm
What they mean:
http://forums.corvetteforum.com/1576116036-post35.html
http://forums.corvetteforum.com/1574918379-post18.html
http://corvettephotographs.com/c4vettes/codes.htm
What they mean:
http://forums.corvetteforum.com/1576116036-post35.html
5th Gear
Joined: May 2015
Posts: 5
Likes: 0
From: Howell MI
I have the same sys error when I don't have a prom in my 91,also got the same after reprogramming a prom and putting it on. I think it has to do with the prom either being corrupted or programmed wrong so it goes into a limp mode.
Thread Starter
Melting Slicks
Joined: Jul 2004
Posts: 3,277
Likes: 32
From: Mission Viejo California
I'm getting error code 41 which I believe is failure to communicate between the ECM and ccm. After researching, it sounds like it could be chip related or it could be tough to diagnose based on the other threads I saw.
I believe I did try to re bun the file once but will try again since it's the easiest fix.
I did start another thread about the situation recently.
"1992 Vette C41- need a little more info about where to check"
I believe I did try to re bun the file once but will try again since it's the easiest fix.
I did start another thread about the situation recently.
"1992 Vette C41- need a little more info about where to check"
Last edited by qwiketz; May 15, 2015 at 08:15 PM.
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Drifting
Joined: Nov 1999
Posts: 1,502
Likes: 12
From: Yorktown Heights NY
I'm getting error code 41 which I believe is failure to communicate between the ECM and ccm. After researching, it sounds like it could be chip related or it could be tough to diagnose based on the other threads I saw.
I believe I did try to re bun the file once but will try again since it's the easiest fix.
I did start another thread about the situation recently.
"1992 Vette C41- need a little more info about where to check"
I believe I did try to re bun the file once but will try again since it's the easiest fix.
I did start another thread about the situation recently.
"1992 Vette C41- need a little more info about where to check"
On the chip burner I have the socket handle is near the #1 pin. The dot on the chip should be towards the handle as the dot indicates which end #1 is at. Seems like you may have had the chip backwards in the burner.....did you get a chip program complete message after you burned the chip? Did you try to read the chip after burning it?
Last edited by 95BLKVette; May 20, 2015 at 07:19 PM.
Thread Starter
Melting Slicks
Joined: Jul 2004
Posts: 3,277
Likes: 32
From: Mission Viejo California
It's definitely the chip when the fans run like that and you get sys and other error codes.
On the chip burner I have the socket handle is near the #1 pin. The dot on the chip should be towards the handle as the dot indicates which end #1 is at. Seems like you may have had the chip backwards in the burner.....did you get a chip program complete message after you burned the chip? Did you try to read the chip after burning it?
On the chip burner I have the socket handle is near the #1 pin. The dot on the chip should be towards the handle as the dot indicates which end #1 is at. Seems like you may have had the chip backwards in the burner.....did you get a chip program complete message after you burned the chip? Did you try to read the chip after burning it?
I did check the chip and it was burned correctly or so tunerpro says.
I did have a problem not too long ago (last time the car drove at all) where the power would cut out entirely. No dome lights, headlights, dash light, nothing. 100% dead. I replaced the battery, and 2 main ground wires and I'm at least getting the car to crank regularly. Here is the thread on that:
https://www.corvetteforum.com/forums...und-issue.html
Any chance the two are related? I'll have to double check, but I think I recall seeing wires getting grounded out when pinched causing the whole system to shut down. My new battery to block ground is pretty tight so I could see that happening. I'm thinking out loud now; I need to get a flashlight and start prodding around new the ground wires.
Drifting
Joined: May 2013
Posts: 1,736
Likes: 31
From: Reno Nevada
Code 41 can be set from not plugging the chip adapter together with the memcal correctly. Both large chips of equal size must be justified to the same end. Also, the memcal must be from a v8 TPI car or it will set the code.
Drifting
Joined: Nov 1999
Posts: 1,502
Likes: 12
From: Yorktown Heights NY
thanks for the response. In the burner, I have the dimple on the chip facing the handle. In the car, I have it facing away from the handle on the moates interface.
I did check the chip and it was burned correctly or so tunerpro says.
I did have a problem not too long ago (last time the car drove at all) where the power would cut out entirely. No dome lights, headlights, dash light, nothing. 100% dead. I replaced the battery, and 2 main ground wires and I'm at least getting the car to crank regularly. Here is the thread on that:
https://www.corvetteforum.com/forums...und-issue.html
Any chance the two are related? I'll have to double check, but I think I recall seeing wires getting grounded out when pinched causing the whole system to shut down. My new battery to block ground is pretty tight so I could see that happening. I'm thinking out loud now; I need to get a flashlight and start prodding around new the ground wires.
I did check the chip and it was burned correctly or so tunerpro says.
I did have a problem not too long ago (last time the car drove at all) where the power would cut out entirely. No dome lights, headlights, dash light, nothing. 100% dead. I replaced the battery, and 2 main ground wires and I'm at least getting the car to crank regularly. Here is the thread on that:
https://www.corvetteforum.com/forums...und-issue.html
Any chance the two are related? I'll have to double check, but I think I recall seeing wires getting grounded out when pinched causing the whole system to shut down. My new battery to block ground is pretty tight so I could see that happening. I'm thinking out loud now; I need to get a flashlight and start prodding around new the ground wires.
Thread Starter
Melting Slicks
Joined: Jul 2004
Posts: 3,277
Likes: 32
From: Mission Viejo California
I changed the battery, both the big and small ground wire and the studs that screw into the battery. Even my old battery was a year or so old and the car hasn't been in rain for at least 5 years. It's a garage queen in California.
Drifting
Joined: Nov 1999
Posts: 1,502
Likes: 12
From: Yorktown Heights NY
Too bad you don't know someone with a known good PCM to swap in so you can eliminate that as the issue.
Drifting
Joined: Nov 1999
Posts: 1,502
Likes: 12
From: Yorktown Heights NY
5th Gear
Joined: May 2015
Posts: 5
Likes: 0
From: Howell MI
The sys error isn't just from a corrupt/missing chip, I have a good running tune on my car and it still displays the sys error, I also replaced the battery but it still flashes. If anyone has any ideas let me know
Racer
Joined: May 2013
Posts: 278
Likes: 7
From: Long Valley NJ
Not to hijack, but I lived in Lake Forest when I was a kid!
Rancho Cañada, then Serrano until we moved...in those days, very few people called it Lake Forest and everyone just called it all El Toro.
The Sun and Sail Club is where I spent almost every waking moment...not sure if that's even still around, but those were great days.
Small world, sometimes.
Last edited by Drew95; Jun 11, 2015 at 08:59 PM.
Thread Starter
Melting Slicks
Joined: Jul 2004
Posts: 3,277
Likes: 32
From: Mission Viejo California
Small world! I'm over in Serrano Ridge. I'm posting off my phone but where are you out of now? There are actually quite a few c4's in this neighborhood although most are parked.