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January Update:
Today was the first "in car" test of the reconfigured navigation unit and it worked as expected!
This means that 5 out of ~28 gauges worked as is.
With the CAN bus module under development, an additional ~22 gauges will display live data.
-AND- pressing the DISC/AUX button now brings up the Music Box / Disc / Bluetooth and now the *AUX IN* screen.
My next step it to make a few "plug an play" cables to test the audio and video quality.
Anyways, that's all for now.
I hope to have another update in a few weeks the most of the gauges working
To prevent duplicate content in "Hard Drive Mod" and "Modding the OEM Navigation Head Unit / Gaining GT-R MFD & Other Functions" threads,
updates will be posted here: https://www.myg37.com/forums/audio-v...ml#post4318880
AND... there are some good ones!!
We can now re-name any GTR gauge (ex: trans oil pressure to diff oil temp, ethanol content, etc), display tire pressures and show the trip computer.
I have a firmware update disk iso another member provided back in oct. 2017. I don't recall what the version on it is but it did resolve my mp3/nav/reboot issue on longer routes. It's just disk 0, no map/data disks. It accepted my original map data without issue.
I came across this thread and got to say, I had no idea you guys were working on this....I went through a lot of this is 2020.
Bit of a brain dump:
Initially started because I made a harness for retrofitting 08-it units to 06-it cars because I wasn't willing to pay the crazy amount that "someone" wants, later this evolved into working out uart access so I could alter other Infiniti/Nissan 08-it units for use in the GTR along with the retrofit harness (and unlocking them so they don't throw a fit when the BCM doesn't match).
The 06-it equipped R35s shipped as "nav" or "non-nav" and I quickly discovered that the "non-nav" panels report a different ID and subsequently all button IDs are different - however you can advertise the correct panel ID (at any point) with the non-nav panel connected and the button IDs are then correct and understood on the 08-it unit. The main IC on the panels is a mask rom so no way to modify that - was hoping for some resistors denoting unit type...
Made a little panel emulator on an stm32 as well just to press buttons for me without the panel needing to be connected.
There's enough breakers here that it never became a big enough issue to need to work out a clean solution for this, however I did get it working (pretty much as you guys were thinking) with an stm32 sat in-between the panel on the AVCAN bus (tip: those cheap odometer filters sold on aliexpress for mercedes/bmw are perfect - stm32, dual can transceiver and 12v ldo)
Recently started looking at the touchscreen comm, got a reasonable understanding of the data format (also just uart) but not done anything with this yet.
Spent a lot of time reverse engineering the main vxworks blob so have quite a few functions documented, also worked out how to decrypt the nav disks and generate serials for map updates.
So if there's anything that's still a mystery that I might be able to help with, please ask!
Hey this may be a little late in asking but I recently purchased a 2014 Nissan with an outdated gps map. I have a 2018 update disk but can’t use it because of the invalid key (I have the key the disk came with but it was for a different head unit). Do you have any more info on getting new license keys? Thanks
01-08-2023, 08:45 PM
