sys flashing??
Thread Starter
Instructor
Joined: Oct 2010
Posts: 118
Likes: 0
From: Rapid City South Dakota
sys flashing??
I have a 1992 lt1 that I had to jump start this morning. It don't get driven to much in the winter here.
As I was driving I noticed an "SYS" blinking in the gauges that give a digital read of oil temperature coolant temperature voltage fuel info ECT. It blinks three or so times then gives me my reading and flops back and forth.
What could this mean??
Thank you
Dano
As I was driving I noticed an "SYS" blinking in the gauges that give a digital read of oil temperature coolant temperature voltage fuel info ECT. It blinks three or so times then gives me my reading and flops back and forth.
What could this mean??
Thank you
Dano
Race Director
Joined: Jun 2001
Posts: 10,956
Likes: 679
From: Marlboro country MA
You'll get a blinking 'SYS' whenever the battery has been discharged or needs replacement. Try to pull out the computer's fuse for a moment to reset the error code. If it returns, you probably need a new battery.
Race Director
Joined: Apr 2009
Posts: 19,294
Likes: 2,753
From: Charlotte NC
I have a 1992 lt1 that I had to jump start this morning. It don't get driven to much in the winter here.
As I was driving I noticed an "SYS" blinking in the gauges that give a digital read of oil temperature coolant temperature voltage fuel info ECT. It blinks three or so times then gives me my reading and flops back and forth.
What could this mean??
Thank you
Dano
As I was driving I noticed an "SYS" blinking in the gauges that give a digital read of oil temperature coolant temperature voltage fuel info ECT. It blinks three or so times then gives me my reading and flops back and forth.
What could this mean??
Thank you
Dano
This is telling you that you have a trouble code in the Central Control Module (CCM)...which some call the Body Control Module (BCM) This is NOT a code in the ECM or PCM. This/these code(s) can me manually accessed and read so you can find where the problem is located in the CCM...and it will give you a code ..and thus it can be diagnosed and repaired.
From personal/professional experience...jump starting battery does not cause this "SYS to flash ( unless you used a jump box, battery charger with really serious amps..much higher than what the alternator produces and tried to start it with a really high amp charge). I am NOT stating that jumping it can not cause it...I have never had it cause it...it was always something else that causes the SYS to flash.
DUB
Safety Car
Joined: Jan 2004
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http://www.corvette-guru.com/uploads...CMCodePull.pdf
Pay special attention to which module you are in when reading a code
Race Director
Joined: Oct 2005
Posts: 11,759
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From: Rolla Missouri
2021 C4 of the Year - Unmodified Finalist
St. Jude Donor '10 thru '25
I have a 1992 lt1 that I had to jump start this morning. It don't get driven to much in the winter here.
As I was driving I noticed an "SYS" blinking in the gauges that give a digital read of oil temperature coolant temperature voltage fuel info ECT. It blinks three or so times then gives me my reading and flops back and forth.
What could this mean??
Thank you
Dano
As I was driving I noticed an "SYS" blinking in the gauges that give a digital read of oil temperature coolant temperature voltage fuel info ECT. It blinks three or so times then gives me my reading and flops back and forth.
What could this mean??
Thank you
Dano
The SYS flashing every few minutes indicates an electrical system fault.
Number one cause is a discharged/bad battery
Drifting
Joined: Jul 2012
Posts: 1,796
Likes: 14
From: Nampa Idaho
Get a battery tender and you won't have that problem in the winter!
I got this one at Auto Zone for $39. It works great!
http://batterytender.com/products/au...-at-0-75a.html
I got this one at Auto Zone for $39. It works great!
http://batterytender.com/products/au...-at-0-75a.html
Race Director
Joined: Apr 2009
Posts: 19,294
Likes: 2,753
From: Charlotte NC
If the alternator is charging (13.6 to 14.4 volts approx) and shows on your display when the engine is running. If it is below the above mentioned voltage values...lets say charging at or below 12.0 volts. Then you have an alternator issue. I really do not think that it is a voltage issue due to the alternator is working if it is in the 13.6-14.4 voltage values. Replacing the battery may correct a weak or low battery...but without you pulling the CCM trouble code(s)...it is hard to say what the problem is. I would do this before I installed a new battery.
Please inform us on the progress when and if you change the battery and the SYS light still flashing. If it goes out...it would be the first one I have encountered due to this issue. Would not be the first time.
DUB
Please inform us on the progress when and if you change the battery and the SYS light still flashing. If it goes out...it would be the first one I have encountered due to this issue. Would not be the first time.
DUB
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Race Director
Joined: Oct 2005
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From: Rolla Missouri
2021 C4 of the Year - Unmodified Finalist
St. Jude Donor '10 thru '25
It is not a constant flashing, but just a flash every few minutes.
I have experienced it with my '96, and it has been reported here many times.
The fact that he had to "jump" the car to get it started leads one to question the quality of the current battery.
He may not have a "bad" battery, just one that isn't fully charged.
It might also be toward the end of its useful life. A battery that has been discharged enough to require a jump usually will not ever come back to a full "like new" charge.
Thread Starter
Instructor
Joined: Oct 2010
Posts: 118
Likes: 0
From: Rapid City South Dakota
Well after the car sat for 7 days it fired right up with the old battery (little slow on the crank but still fired right away). Pulled the codes they are 1.1 H23, H71, H72, and H73. I will look them up tomorrow and see then.
Melting Slicks
Joined: Aug 2008
Posts: 2,082
Likes: 50
From: Palmdale CA
I personally don't like "jumping" it can cause a power surge in the electrical circuits.. and we all know computers don't like power surge's! If your stuck on the road, well that's one thing.. in your driveway it can be avoided.
Here is another good site for code descriptions, and retrieval.
http://tech.corvettecentral.com/2011...trouble-codes/
Here is another good site for code descriptions, and retrieval.
http://tech.corvettecentral.com/2011...trouble-codes/
Thread Starter
Instructor
Joined: Oct 2010
Posts: 118
Likes: 0
From: Rapid City South Dakota
I personally don't like "jumping" it can cause a power surge in the electrical circuits.. and we all know computers don't like power surge's! If your stuck on the road, well that's one thing.. in your driveway it can be avoided.
Here is another good site for code descriptions, and retrieval.
http://tech.corvettecentral.com/2011...trouble-codes/
Here is another good site for code descriptions, and retrieval.
http://tech.corvettecentral.com/2011...trouble-codes/
Thanks again
Burning Brakes
Joined: Apr 2009
Posts: 1,185
Likes: 33
From: Charlotte Michigan
I personally don't like "jumping" it can cause a power surge in the electrical circuits.. and we all know computers don't like power surge's! If your stuck on the road, well that's one thing.. in your driveway it can be avoided.
Here is another good site for code descriptions, and retrieval.
http://tech.corvettecentral.com/2011...trouble-codes/
Here is another good site for code descriptions, and retrieval.
http://tech.corvettecentral.com/2011...trouble-codes/
Now I can see what my problem may be as I was requesting help for asr service message on the dash on the forum.
Thanks.