Sys light on lcd?
Thread Starter
Racer
Joined: Jan 2002
Posts: 322
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From: ruston la
Sys light on lcd?
What causes the "sys" light to blink on the lcd? I have a '93 and haven't found it in my service manuals. I'm new to the manuals and it's taking a while to get adjusted to using them.
Racer
Joined: Aug 2002
Posts: 405
Likes: 0
From: hamilton ontario
Originally Posted by ncider
What causes the "sys" light to blink on the lcd? I have a '93 and haven't found it in my service manuals. I'm new to the manuals and it's taking a while to get adjusted to using them.
hope fully its not your computer on my 92 it was the battery
Thread Starter
Racer
Joined: Jan 2002
Posts: 322
Likes: 0
From: ruston la
Just replaced the ECM and the PROM. Nothing was wrong with the PROM though so that was a big waste of money. I guess I can always put it on EBAY. A new battery is sitting at home waiting for me. Hopefully that will fix it because I'd hate to replace the CCM. My service manuals are at home with the car so I haven't had a chance to diagnose the CCM again and see what the different codes are. Thanks for the input everyone.
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
Originally Posted by VictorRussell'92
Guys, whats the difference b/w the ECM and the CCM? I know what the ECm is didn't know about the CCM.... 
Starting in 1990, GM added the CCM to the mix. It's the Central Controller. It acts like a traffic cop to the ABS and the ECU.
There is the Serial Data Line that connects the CCM to the ECU and the ABS (later ABS/ASR) computer to the CCM. This allows the CCM to inform the ABS what is going on, and visa-versa.
you can get ECU codes from the CCM, easier than counting flashes, too!
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