Originally Posted by 8VETTE7

Pull the codes for the car. I have seen situations where the RFA shows NO COMMS and when that happens then the FOB cannot be programmed. If you have never pulled codes before here is how:


OR



http://www.c5forum.com/ayc/dtcdic.php

You are specifically interested in the codes for B0 - RFA but post ALL your codes including the H or C or HC that follow each 5 character code.

Originally Posted by 8VETTE7

Well with all those codes it is a crap shoot as to what is really significant since they have probably not been cleared any time recently.

I suggest that you clear ALL of the codes (see video for how to do that) and then take the car fr a nice ride ( 10 or 15 miles is enough) and when you return pull the codes again BEFORE you shut off the engine. To pull codes with the engine running you MUST first use the reset button to clear ALL messages displayed in the DIC. Then pull codes as normal. I fully expect the RFA NO COMMS to return. But I doubt most of the rest will return. The codes that do return are the ones that need attention.

The most likely cause of the NO COMMS is the U1255 code. Rather than have you try a bunch of things right now, do what I suggested with clearing codes, driving the car and then pulling codes again. Post back in this thread ALL the codes that return. I or someone else familiar with codes will help you out with your issue......


Please check the carpet in the passenger footwell to see if it is wet...........

Have you recently disconnected the battery or had problems with the battery???

Originally Posted by 8VETTE7

For the HVAC code Try the steps in the following link:

https://www.corvetteforum.com/forums...-for-free.html


If that doesn't do it the fun starts as the plastic gear inside the actuator is known to crack and cause the same symptom. Try the fuse thing first.

THe B2860 is related to the telescopic column. Suggest that you run the column full in and full out a few times. Do this with the engine running to avoid excess drain on the battery.

Now the tough one, NO COMMS for the RFA. I would start by checking grounds. G104 is for the RFA. Here are a couple links about grounds that you might want to save for the future:

http://forums.corvetteforum.com/c5-t...locations.html

http://forums.corvetteforum.com/c5-t...tion-long.html Post #1


The RFA itself seldom fails but the ground and serial data buss connection are often issues. I'll wait until you try the ground as checking the serial data buss connection is more involved.

After each repair(s) you do you need to clear the code and then test out the repair and pull codes again to see if the code returns...

Originally Posted by 8VETTE7

For the HVAC code Try the steps in the following link:

https://www.corvetteforum.com/forums...-for-free.html


If that doesn't do it the fun starts as the plastic gear inside the actuator is known to crack and cause the same symptom. Try the fuse thing first.

THe B2860 is related to the telescopic column. Suggest that you run the column full in and full out a few times. Do this with the engine running to avoid excess drain on the battery.

Now the tough one, NO COMMS for the RFA. I would start by checking grounds. G104 is for the RFA. Here are a couple links about grounds that you might want to save for the future:

http://forums.corvetteforum.com/c5-t...locations.html

http://forums.corvetteforum.com/c5-t...tion-long.html Post #1


The RFA itself seldom fails but the ground and serial data buss connection are often issues. I'll wait until you try the ground as checking the serial data buss connection is more involved.

After each repair(s) you do you need to clear the code and then test out the repair and pull codes again to see if the code returns...

Originally Posted by 8VETTE7

Probably NOT coincidence. The Seat Control Module and the Serial Data Buss wire (brown & White) are often involved in strange C5 electrical problems. However there are usually more codes to point in that direction. When you reinstall the seat make certain that no wires get pinched between the floor and the seat frame. The factory had a specific way they attached the wire harness to the seat to prevent damage from pinching and from extremes of travel of the seat. You may not have taken careful note of this or perhaps a previous owner had the seat out before and did not take the care to attach it the same way the factory had. Wish I had taken pictures the last time I had my drivers seat out. They may have been of some help to you.