"SYS"

[bones]

My baby has been is storage for the last seven months. I start her and take her for a drive every few weeks but the last time, I noticed a "sys" popping up on the digital readout next to the speedometer (96 C4). She seems just fine but what the heck is the "sys" all about?

Gary

[goldenC4]

That's the generic "there's a trouble code set" message. Jumper the pins of your ALDL with a paper clip to read the codes. Then you can just google for the code.

[1EVLC7]

Yes, get us code and we can help

[bones]

Ok, paper clip I know about but ALDL???

Feeling technically challenged here

[goldenC4]

ALDL stands for "Assembly Line Diagnostic Link" - it's the plug under the dash by your right knee to plug scan tools into. You can jumper two of the pins on it with a paper-clip and the digital dash will display the codes. The alternative is that you can buy a scan tool or a cable to connect to a laptop from http://www.aldlcable.com to read the codes. With the cable (you need the OBD-II one) you can read all kinds of stuff while the motor's running.

Here's a great writeup on how to do this:

http://www.corvettephotographs.com/c4vettes/codes.htm

[dss LT1]

My bet is that your battery is shot. That is they way the electronics in the C4 behave when the battery is on its way out.

[r40734]

Did you say your car called you a Sissy?

[bones]

ALDL stands for "Assembly Line Diagnostic Link" - it's the plug under the dash by your right knee to plug scan tools into. You can jumper two of the pins on it with a paper-clip and the digital dash will display the codes. The alternative is that you can buy a scan tool or a cable to connect to a laptop from http://www.aldlcable.com to read the codes. With the cable (you need the OBD-II one) you can read all kinds of stuff while the motor's running.

Here's a great writeup on how to do this:

http://www.corvettephotographs.com/c4vettes/codes.htm

Thanks for the link my friend! I will get the code this weekend when I go to storage.

[bones]

Ok vette heads! I got the "sys" codes and they are:

module # 1

diagnostic trouble code H31

I can't seem to find a reference to this code by a web search so any help would be great!

[Jester]

Ok vette heads! I got the "sys" codes and they are:

module # 1

diagnostic trouble code H31

I can't seem to find a reference to this code by a web search so any help would be great!

Here is the awnser

I was able to recover the cosed using this technique and I would like to know whast they stand for now. I got the following from module 1 the CCM. H31, H33, H35, AND H37.

Thanks for the help and I hope that some others can use this information.Module 1 CCM DTCs

31=LCD Data Circuit shorted to B+ or CCM internal open.

33=Data Clock Circuit shorted to B+ or CCM internal open.

35=Data Strobe circuit shorted to B+ or CCM internal open.

37=M Clock Circuit open or shorted to B+ or CCM internal open.

Like FX GS said, the H indicates a history code. Forget about it.

If you want to read PCM codes, get access to a scan tool. Try Auto Zone. They'll do it for free.

And here in the link to the site I found it Link

Hope this helps

Greg

[bones]

Thanks everyone! You are a great help! Save the wave!