"SYS" Light on '94 Convertible
Thread Starter
Intermediate
Joined: Dec 2014
Posts: 27
Likes: 0
"SYS" Light on '94 Convertible
Good evening everyone,
I have seen a few threads on diagnosing a "SYS" light situation. I just bought a '94 convertible and took it out tonight for the first time. I noticed the "SYS" light by the gas gauge is blinking. From what I can tell it blinks 3 times then goes out for about 10 seconds and repeats itself. I do have an aftermarket stereo, but I would like to diagnose the real reason on why it is flashing. It runs great with no issues. Can anyone tell me if this "blinking 3 times then pausing for 10 seconds and repeating" means anything specific???
I have seen a few threads on diagnosing a "SYS" light situation. I just bought a '94 convertible and took it out tonight for the first time. I noticed the "SYS" light by the gas gauge is blinking. From what I can tell it blinks 3 times then goes out for about 10 seconds and repeats itself. I do have an aftermarket stereo, but I would like to diagnose the real reason on why it is flashing. It runs great with no issues. Can anyone tell me if this "blinking 3 times then pausing for 10 seconds and repeating" means anything specific???
Race Director
Joined: Oct 2011
Posts: 16,083
Likes: 818
From: Dallas Texas
2025 C4 of the Year Finalist - Modified
Check if you have any stored codes. Put a paper clip in pins 4 and 12 on the obd2(but your car is obd1) port. DO NOT START THE CAR, just put the key in the ON position.
Team Owner
Joined: Sep 2003
Posts: 25,377
Likes: 2,735
OP - here's a rather through explanation of the "how to" for checking ECM/PCM/CCM codes and functions using the DIC function buttons. It's a very good read and likely covers the possible things you'll find.
A first to do (since car is new to you) is have the battery (load tested) and the charging system checked for performance. Most auto chains can likely help you.
SYS can certainly hint a "charging/battery" situation.
I do believe that your after-market if not done correctly does the sequencing you mention. The link I thought mentioned it doesn't seem to be active any longer. I'll look further maybe. I'm quite sure it was a TSB but published well before '94 production.
http://tech.corvettecentral.com/2011...trouble-codes/
Did you get a FSM with your purchase? FSM = Factory Service Manual
This isn't what I was looking for but this does it pretty well:
https://www.corvetteforum.com/forums...post1564639185
A first to do (since car is new to you) is have the battery (load tested) and the charging system checked for performance. Most auto chains can likely help you.
SYS can certainly hint a "charging/battery" situation.
I do believe that your after-market if not done correctly does the sequencing you mention. The link I thought mentioned it doesn't seem to be active any longer. I'll look further maybe. I'm quite sure it was a TSB but published well before '94 production.
http://tech.corvettecentral.com/2011...trouble-codes/
Did you get a FSM with your purchase? FSM = Factory Service Manual
This isn't what I was looking for but this does it pretty well:
https://www.corvetteforum.com/forums...post1564639185
Last edited by WVZR-1; Mar 25, 2016 at 07:15 AM.
