Newbie Needs Info About ECM Location
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Joined: Nov 2007
Posts: 9
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Newbie Needs Info About ECM Location
Being the owner of a 1995 Base Corvette with the LT1 engine for all of two months, I'm ignorant of a lot of things.
I have a message that flashes next to my speedometer - it flashes "SYS".
Judging by the conversations I've seen by lurking, I assume that it means I triggered a code. Okay, I bought an AUTO X-RAY EZ Read 2000 scanner. It came with 4 connectors but the owners manual states that some 1994-1995 GM and Fords have an OBD II interface but use OBD I protocols. How would I know if it uses the OBD I protocols?
So no flaming please - I have used the search feature and haven't found the info that I need. Just where is the connector located for me to hook up my Scanner?
Also, while I was installing a new sound system I saw a large connector hooked to a long cable in the compartment behind the drivers seat. Just what is this connector?
I've tucked the Vette in the garage for the winter so I can take my time in reading the codes and repairing the problems.
Thanks for any information/advice that others can share with me.
I have a message that flashes next to my speedometer - it flashes "SYS".
Judging by the conversations I've seen by lurking, I assume that it means I triggered a code. Okay, I bought an AUTO X-RAY EZ Read 2000 scanner. It came with 4 connectors but the owners manual states that some 1994-1995 GM and Fords have an OBD II interface but use OBD I protocols. How would I know if it uses the OBD I protocols?
So no flaming please - I have used the search feature and haven't found the info that I need. Just where is the connector located for me to hook up my Scanner?
Also, while I was installing a new sound system I saw a large connector hooked to a long cable in the compartment behind the drivers seat. Just what is this connector?
I've tucked the Vette in the garage for the winter so I can take my time in reading the codes and repairing the problems.
Thanks for any information/advice that others can share with me.
Race Director
Joined: Jan 2002
Posts: 12,264
Likes: 88
From: O'Fallon Missouri
All 1994/95 Corvettes have OBDI PCMs with OBDII ALDL connectors.
There is a pretty good possibility your flashing "SYS" is caused by your new sound system.
Your PCM is located in the left side engine compartment right above the battery.
There is a pretty good possibility your flashing "SYS" is caused by your new sound system.
Your PCM is located in the left side engine compartment right above the battery.
Thread Starter
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Joined: Nov 2007
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Thanks to the people who have given me info.
Another thing I found was a long thin cable that comes from one of the rear compartments, goes by the console on the passenger side. The cable terminates with a head that has two telephone-type connectors. I don't see anything in my Haynes book about this cable.
Another thing I found was a long thin cable that comes from one of the rear compartments, goes by the console on the passenger side. The cable terminates with a head that has two telephone-type connectors. I don't see anything in my Haynes book about this cable.
Last edited by Captain Hayes; Dec 7, 2007 at 09:58 AM.
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Safety Car
Joined: Apr 2003
Posts: 3,793
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From: VA
If you want to understand the car you need a real service manual not a Haynes.
I did a quick search for threads in this section with "1995" in the title, and found several threads that would answer most of your OBD-related questions. Other relevant search terms would be "OBD2" "OBDII" "OBD1" "OBDI" and "ALDL"
