" SYS " flashing on fuel display
Team Owner
Joined: Oct 2000
Posts: 29,937
Likes: 22
St. Jude Donor '03-'04
Cruise-In 1-2-3-4-5 Veteran
Re: " SYS " flashing on fuel display (TedO)
Yep. You have an electrical system fault. Somewhere in the system, the CCM is monitoring a circuit and not seeing an expected current draw or voltage drop.
Do you have an aftermarket stereo system?
If not, read your CCM codes.
Go under your dash panel on the driver's side. Get a short, stiff length of wire and bend it into a U shape. Find the ALDL link, a black cable connector under the dash over the gas pedal (LT1 cars).
Stick one end of the U wire into terminal A. (Uppermost/rightmost) Stick the other end into terminal G (Lowermost/leftmost). Put the key in the ignition and turn the key to RUN but do not start.
The fans will come on.
Then the LCD screen will start displaying stored fault codes where the speedometer display usually is. Write the codes down and report back.
(This only applies to 1982 to 1993 cars)
[Modified by Matt Black, 11:26 PM 2/19/2003]
Do you have an aftermarket stereo system?
If not, read your CCM codes.
Go under your dash panel on the driver's side. Get a short, stiff length of wire and bend it into a U shape. Find the ALDL link, a black cable connector under the dash over the gas pedal (LT1 cars).
Stick one end of the U wire into terminal A. (Uppermost/rightmost) Stick the other end into terminal G (Lowermost/leftmost). Put the key in the ignition and turn the key to RUN but do not start.
The fans will come on.
Then the LCD screen will start displaying stored fault codes where the speedometer display usually is. Write the codes down and report back.
(This only applies to 1982 to 1993 cars)
[Modified by Matt Black, 11:26 PM 2/19/2003]
Thread Starter
Intermediate
Joined: Sep 1999
Posts: 48
Likes: 0
From: Ponchatoula,LA
Re: " SYS " flashing on fuel display (Matt Black)
Thanks Matt. I'll try to do it this weekend.
Matt, I'm putting in a new battery this weekend. A recent cold snap has crippled my 5 year old battery. Could this have any impact on the situation?
Matt, I'm putting in a new battery this weekend. A recent cold snap has crippled my 5 year old battery. Could this have any impact on the situation?
Team Owner
Joined: Dec 2000
Posts: 21,094
Likes: 282
From: Phila., PA burbs
Re: " SYS " flashing on fuel display (TedO)
A recent cold snap has crippled my 5 year old battery. Could this have any impact on the situation?
[Modified by TA, 3:44 PM 2/28/2003]
Drifting
Joined: Jul 2002
Posts: 1,705
Likes: 5
From: OKC Oklahoma
Re: " SYS " flashing on fuel display (TedO)
do you have an aftermarket stereo?
if so, try this:
If "SYS" is displayed in the LCD section of the instrument panel cluster after the customer installs a new stereo, he will need to do the following:
1. Buy (2) 1 kilo-ohm 1/2 Watt resistors. [Radio Shack part # 271-023. They sell them as a 2-pack for 29 cents.]
2. Disconnect the negative battery cable.
3. Remove the receiver.
4. Connect one end of both resistors to ignition power. (Yellow wire in the car.)
5. Connect the other end of one resistor to the purple/white wire in the car.
6. Connect the other end of the second resistor to the grey/black wire in the car.
7. Cover all connections and completely cover the resistors.
8. Reconnect the negative battery cable.
hope this helps :D
if so, try this:
If "SYS" is displayed in the LCD section of the instrument panel cluster after the customer installs a new stereo, he will need to do the following:
1. Buy (2) 1 kilo-ohm 1/2 Watt resistors. [Radio Shack part # 271-023. They sell them as a 2-pack for 29 cents.]
2. Disconnect the negative battery cable.
3. Remove the receiver.
4. Connect one end of both resistors to ignition power. (Yellow wire in the car.)
5. Connect the other end of one resistor to the purple/white wire in the car.
6. Connect the other end of the second resistor to the grey/black wire in the car.
7. Cover all connections and completely cover the resistors.
8. Reconnect the negative battery cable.
hope this helps :D
Safety Car
Joined: Aug 2002
Posts: 3,842
Likes: 230
From: SANTA CRUZ CA
Re: " SYS " flashing on fuel display (TedO)
You are being informed that a DTC (diagnostic trouble code)-setting malfunction has been detected by the CCM (central control module). You are correct about the frequency, as the "SYS" indicator will flash 3 times every 15 seconds. If a malfunction does not recur within 100 ignition cycles, the CCM will automatically clear the DTC. If the warning continues, you should access the code(s) through the Data Link Connector.
Safety Car
Joined: Aug 2002
Posts: 3,842
Likes: 230
From: SANTA CRUZ CA
Re: " SYS " flashing on fuel display (Oldman)
Here is a link for a GM factory manual for your '93 ($35): http://www.factoryautomanuals.com/ca...tomer/home.php
Safety Car
Joined: Aug 2002
Posts: 3,842
Likes: 230
From: SANTA CRUZ CA
Re: " SYS " flashing on fuel display (Oldman)
Also, just in case you don't have this info, here is a link for the trouble codes and remedies: http://www.c4vettes.com/indepth_launch.htm
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Heel & Toe
Joined: Dec 2000
Posts: 21
Likes: 0
From: Sammamish WA
Re: " SYS " flashing on fuel display (TedO)
TedO - "SYS" flashing is a common sign of a battery that is getting ready to die. My car did the same thing when the battery died.
Since you are already swapping the battery, I would complete that before pulling codes, etc as there is a high probability the battery will fix it.
Good luck!
Since you are already swapping the battery, I would complete that before pulling codes, etc as there is a high probability the battery will fix it.
Good luck!
Melting Slicks
Joined: Apr 2001
Posts: 2,877
Likes: 7
Re: " SYS " flashing on fuel display (fourthrail)
I had a battery do the same thing to me, it also happened when I ran the car with the seat removed and disconnected for the power seats and pumps.
Start with the battery and you'll probably clear it right up
Start with the battery and you'll probably clear it right up
Team Owner
Joined: Oct 2000
Posts: 29,937
Likes: 22
St. Jude Donor '03-'04
Cruise-In 1-2-3-4-5 Veteran
Re: " SYS " flashing on fuel display (Mrcorvette91)
I hope the battery clears it up.
Many other things cause this message, tho.
Fuses can do it. For instance, you'll get the SYS message if you pull both CTSY fuses and leave them out. Various things like that...
~Matt
Many other things cause this message, tho.
Fuses can do it. For instance, you'll get the SYS message if you pull both CTSY fuses and leave them out. Various things like that...
~Matt
Thread Starter
Intermediate
Joined: Sep 1999
Posts: 48
Likes: 0
From: Ponchatoula,LA
Re: " SYS " flashing on fuel display (Matt Black)
The flashing has stopped. Nothing has changed- except stopped/started a couple of times.
Based on this, and the input from all of you, I believe it must be the battery.
Thanks folks. :seeya later....
Based on this, and the input from all of you, I believe it must be the battery.
Thanks folks. :seeya later....
Le Mans Master
Joined: Oct 2000
Posts: 6,362
Likes: 30
From: Oak Harbor WA
Re: " SYS " flashing on fuel display (TedO)
I left my aux lights on one morning (dark when I leave, but light when I get to work). Got the car jumped and then had the "SYS" flashing. Car runs fine and just waiting for the 100 starts to clear it away. I could just unplug the batt for 30 seconds, but why lose my station presets. :D
