I recently purchased a 1997 C5 and the remotes do not work. I tried going through the options menu and holding down reset to bring up "FOB TRAINING" but when I press the reset again the "HOLD LK + UNLK" message does not appear, it just beeps and stays on "FOB TRAINING". I did find another thread with the same problem but there was not a helpful solution posted. I ran the diagnostics and got a "NO COMMUNICATION" error code. I purchased a new receiver, still the same problem.

 

Not at home with all my info and FSM.

However, do you have TPMS sensors and if so do you know if they work?

Do you know the batteries in the FOBs are good?

Also, are you sure you got the correct older RFA receiver for the early C5?

 

And also are the fobs the correct ones for your Vette? Just any GM fob will not work.

 

It will not progress on the "Tire Training" either. Same thing, just beeps and stays on "Tire Training". I purchased the car with a receiver in it plus a spare, so with the one I also purchased (which did say it was compatible with the 1997) there is now 3 receivers which still are not working. The FOBs are not the issue as I cannot get into the correct menu to allow me to even try to link the FOBs (I did change the battery in one of the FOBs).

 

OK, what was the exact code you got. In fact, pull all your codes and record them. Then clear them and pull them again BEFORE you turn the car off. Report all your codes.

I suspect the wire to the Star Connector that carries the serial bus date is corrupted. Could also be a bad ground wire for the RFA or the power input is not getting there. I doubt that the BCM is bad but that is still on the table until we can't rule anything else out in the failure analysis.

We can do a couple of very simple checks to verify this is true or not. You will need an ohmmeter and a few feet of spare wire. I can provide all the guidance you need.

 

Cheers Dadaroo, can you tell me where the star connector and the ground for the RFA is located?

 

First, I forgot to ask if you verified Fuse 27 in the passenger fuse box has 12 volt power on both sides. If you pull it and test is for continuity (ohmmeter or test light) and it is bad that is enough if the RFA works after that.
The Star connectors (2) for the serial bus are to the left of the BCM in the passenger foot well. The ground is G104 below the battery. All the data from all the modules tie together in the Star connectors. There is also a feed to the data retrieval connector under the driver side dash. I propose to use the serial bus check to that location as a first step.

I propose you remove the connector at the RFA and we check for 3 things. Serial bus integrity, ground, and power. So you don't accidently cross any power to serial bus circuits here is what I propose.

First, remove the negative battery cable and then disconnect the RFA connector.

From the Orange wire at the RFA connector measure the resistance to the battery positive post. Should be almost zero ohms

From the Black wire at the RFA connector measure the resistance to the battery negative cable that is disconnected. Should be almost zero ohms.

From the RFA connector Pink wire measure the resistance to the data connector under the dash. There are 2 rows of connections,, one on the top of the other. We want to connect to the top row pin 2. The top row has pins numbered from right to left starting with Pin 1 on the top far right. So Pin 2 is next to the most top right pin. Again, resistance should be almost zero ohms.

Be careful when making your connections so as not be bend or damage any pins/connectors. Probably need some paperclips, alligator clips, etc. and/or a friend to help.

If you have ANY questions about what you are doing or why please PM or mail me with your phone number and I will explain. This is our first BIG PICTURE step at seeing what is going on. Based on the finding I will propose a next step.

 

hey I'm new here and I'm from Poland. I have the same problem as a friend. Did you solve it?