hey guys need help dose anyone know where i can find the step or has the steps to disable the F55 selective ride control switching over to QA1 coilovers

 

I just had mine done I had F45 and my local dealer / friend did it for me in about 10 min. that is the best way. I dont know if you can get simulators to put in place of your shocks like the F45 ride control hope this helps.

Pops

 

I believe the F55 has to be deleted with a Tech II. Resistors cannot be used on F55.

 

F-55,,, ,,,, Can only be done using the TECH2

Here is a post with the TECH2 Screen Shots.

- C5, Disable the F45 option using Tech2 VODA1, http://forums.corvetteforum.com/c5-t...ing-tech2.html


Here is the TECH2 Procedure out of that post #6

http://www.stopforce.com/RPO.html

Bill

 

Thanks guys for the input I was not sure if you could do it like the F45 this is what makes this place ROCK

 

If you follow the instructions exactly - or have a willing dealership do it, it works perfectly. If after the F55 computer is removed and you still get the 80 mile driving warning, disconnect the battery for at least 3 hours to eliminate the message. Then buy C6 shocks from the GM Parts House - better yet, buy them before you get rid of the old F55 shocks. Ride is as good, if not better, at a fraction of the cost for new F55 shocks.

 

Ok, I'm in the same position of having a bad front variable damping shock and don't want to pay that much to replace it. Is there an order that I need to follow or can I have the dealership program the F55 out with the TECH2 while the variable damping shocks are still installed and then replace them or do I need to wait until the shocks have been replaced? I will have my car at the dealership on Friday for a transmission fluid change and would like to have it done then if I'm not jumping the gun.

 

You better check with your dealer and make sure that they will remove it for you or they even have an inkling on HOW TO DO IT!!!

If,,,,,,,,,,,,,,,,,, they say "YES", we can remove it electronically and you can install the shocks later. Thats GREAT! Most WILL NOT remove it with the F55 shocks in place because of the LIABILITY issues of an UNSAFE vehicle. Without the computer, there BASIC shock dampening in the failure mode. Thats why its the LESS desirable method.

The most preferred method would be to remove the F55 shocks FIRST (after your dealer says YES he can help you and will do it) and then have them remove the system from the BCM..

Until its completely removed,,, you will get DTCs and be limited to less than 88 MPH but who cares!!

Bill

 

Thanks Bill, that is what I was thinking but was not sure. On a related note (maybe) does this affect anything with the tune? I have a Diablo Predator that I use and want to make sure it would not overwrite the change they make. So much to consider with these cars. Thanks

 

Makes sense to me. Just wanted to be absolutely sure before I dive into this mess. Thanks for the info!

 

No Programming the BCM with the TECH2 will NOT change the TUNE. Removing the F-45 or F-55 RPO will not have any effect on engine performance.


You will however need a crow bar. Keep it in the car to pry the grin off of your face when you test out the new shocks! What Shocks will you be replacing all for with?? Do you have any plans on up grading springs or sway bars?


Bill

 

Thanks Bill, I just ordered the 2012 Z06 shocks from Gene Cully. He said they are a direct fit for the C5 and better and cheaper than the stock shocks. I found a guy up in Chesapeake Va about 45 min. from me that will do the work and has a Tech 2. I should be all set! Thanks for all the help.

 

Some stuff about the dealer or local shop and your TUNE...

ANYTIME,,,,,,,,,,,, you take your car to the dealer or a local shop to have work done,,, have the service advisor write on the service order in EASILY SEEN LETTERS:

"DO NOT REFLASH OR UPDATE THE PCM!"

Sometimes, the service tech will reflash the PCM with GMs latest OS and OEM STOCK factory tune.

That would SUCK if you have a $500 custom tune and didnt have a copy of it and your tuner is no longer in business!!!

Just Saying!

 

Great advice Bill as always.

 

Ok Bill, I have the new shocks on and boy are they GREAT! Went to the dealership with the instructions to program the F55 out and they said they followed the procedures exactly and it did not work. I told them I'm sure it works and to try again and make sure to do exactly as the instructions say. They tried again and said nope. Charged me $60 for trying and sent me on my way. I HATE DEALERSHIPS! Please look at the procedures below and make sure I gave them the correct info. I am going to Virginia tomorrow to have another guy up there who has a TECH II give it a try and if it works will be back at the dealer to demand my money back. I have a 2004 coupe.
This is from the post above.
Here are the steps that must be followed EXACTLY with a Tech II to delete F55:

1. Hook up Tech 2, turn car ON, make sure module in the rear is PLUGGED IN. Do Not unplug the rear module.
2. use Tech 2 to delete the F45 option ( F55 did not appear on the menu screen on the Tech 2, use F45)
3. Save new configuration.
4. Do not turn car off, do not remove Tech 2, go to the module in the rear of the car, unplug the grey connector( the widest one) leave the center plug in and the smaller black plug in.
5. Turn off car leave Tech 2 plugged in.
6. Remove remaining plugs from module in the rear of car.
7. turn car on to verify the " Max speed 80 mph" is gone.
8. unplug Tech 2 and put tools away.

HELP

 

Well,,, I have performed the procedure several times and YES, I had to do it over again to get it to remove the RPO

Here is the procedure again:

F-55 REMOVAL PROCEDURE


Procedure must be followed EXACTLY or it will fail to delete.

1. Hook up your Tech 2 (Driver's footwell), turn the car ON, make sure the module in the left rear storage compartment (pull back the velcro lining on the front of the compartment) is plugged in. DO NOT UNPLUG THIS MODULE

2. Now use the Tech 2 to delete the F45 option ( F55 option does not appear on the Tech 2 menu screen - SO - DELETE THE F45 OPTION
(use the screen captures - steps 2-14)

3. Save the new configuration

4. DO NOT TURN THE CAR OFF DO NOT REMOVE THE TECH 2 Go to the module in the rear of the car, unplug the GRAY connector - IT IS THE WIDEST ONE - leave the other 1 (F/45) or 2 (F/55) plugged in.

5. Turn off the car but LEAVE THE TECH 2 PLUGGED IN

6. Remove remaining plugs from module in the rear of the car - Never plug them back in again, if you do the F/45 turns on automatically.

7. Now the moment of TRUTH - Turn the car on and verify that the dreaded - MAX SPEED 80 MPH - is gone. This message was only present if you had already disconnected the shock sensors. Some people have had to disconnect their battery to allow the computer to reset to remove this message, but I would confirm with the Tech II that the F/45 was actually deleted first and if not reconnect everything and start again with step 1.

8. Unplug the Tech 2 - Get in the car and take it for a ride. Smile as you pass the DREADED 80 MPH.

With these instructions in their hands even the most inexperienced tech can do this. It took mine 5 minutes and they charged me $25.

If you haven't already changed your shocks drive home carefully as the shocks become very soft, not dangerous but as GM advises keep it under 80MPH.


Have your friend check and clear DTCs with Tech2 to make sure that its communicating properly. If it is,,, it should work as explained.

Remember,,,, You are removing a set of codes from the BCM and not removing the RTD from the car. Once you program it out of the BCM, and as long as you don't reconnect the RTD Module, your car will NEVER know its there.


Bill

 

fwiw, i had this done and kept getting the error. The only thing that cleared it was to leave the battery unplugged for 24 hours. Weird!

 

I have my own Tech II if you're anywhere in the SoCal area.

 

I just finished doing this project, and can tell you that it works and the car rides great. I may add the larger sway bars to the car later, but for now... "happy camper".

I did run into one issue which I hadn't seen discussed anywhere, so I will throw it out for what it's worth.

After doing the electrical deletion with the Tech II tuner, all of the options on the car reverted to their factory default settings. The seat memory "forgot" my settings, the doors locked on putting the car in gear, the alarm settings changed and the twilight sentinel came "on".

Going through the DIC I was able to reset the door locks and alarm, but not the TS. The seat memory reprogrammed normally. The TS showed that it was "ON" and didn't respond to the reset button.

I think that it could be reset using the Tech II, since it shows up as one of the items that can be changed on the menu, but since the guy that has it is about 30 miles away I tried something else. I found that the TS has a relay on the fuse panel under the passenger's toe panel and simply removed it. The TS is now off, as I wanted it to be and haven't seen any other side effects. The relay is item "44" on my 2003.

Like I said, I hadn't seen anyone else mention this... but thought it might help if it happens to someone else.

Ken Edney
Chandler, AZ

 

Also just discovered that the key fobs needed to be reprogrammed.

I was happy to see that my Window Valet is still working, once the fobs were reset.

Ken Edney
Chandler, Az.