Does it have LC5 on it? You might have to update the firmware on it to the latest version. You will want to select LC5 VDC OFF if you want to use launch control. Even if you don't plan on launching it, just select that one.

 

Ok, the confusing part for me is how to start the installation. I followed the instructions: insert the access port, press start 2x without stepping in the break, vehicle identification result: usdm 2009 GT-R, standard tuning vs SD (I picked standard tuning), Select the Map - this is where I got confused because I was looking for LC5 directly and I can not find it. I t only shows stage1, 91 ..some other settings that I dont understand. I did some research last night regarding how to flash the LC5 and the procedure says that I need to install the appropriate Map first and it will take me to TCM (LC5) installation after that. Can u tell me the map that I need to install? My car is basically OEM I only got Y-pipe and catback. I dont do track, just regular street use. I just want to update to LC5 to have a smooth ride and save my tranny in case that I do LC once in a while.. u know what I mean..I connected the access port last night to cobb website and it still updated, I did not adjust anything. I took a picture of the program installed in the pc screen, it has LC5 on it. Can you tell me which Map is the best for me based on those infos? Also, please tell me the LC5 file that I need to load, looks like there are more than one LC5 file. Is there also a way to uninstall this changes and go back to OEM or stock mode for the future? Sorry, I am asking too manny questions, I just wanna make sure that I am doing it right. i f you think I missed a step, let me know specially after flashing the LC5, what is next? Thanks - Tony

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That's right, you have to flash the ECM first, then the next step is the TCM. You will see the ones that need to be picked, you cannot pick the wrong file. The AP will not let you do that.

 

Thanks, do I still need to do the relearm process after the installation of LC5? And what is the procedure of doing that?

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Yes. It's in the menus can't remember on the V2. YouTube has videos on it

 

Ok, thanks. I will look for it in the you tube.

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Update firmware and make sure you have the latest maps you want on AP.

Install standard (not SD) stage I.

Then TCM KJ10B VDC off LC5.

If you don't install vdc off, launch will not work properly.

Good luck and there are YouTube videos