Modding Avic-N1/N2 Nav DVD’s

Hmmm you guys found and matched my results exactly.  I also was able to sub out the 010apt from 40mt while  keeping the original 50mt  040APL and unit still suffered from the lockout, but software still at least worked.   I have a friend that is good at hexing things and he said that a 4meg file can't be too complicated and so maybe he could hex it and eliminate the call to monitor the gyro or gps.

Anyone have a 100% proven knowledge what sensor or sensors are monitored?  I am at the point of disassembling my unit and finding if the n-1 can have the resistor mod done to it.

Now if Pioneer says that the N-1 and the N2 are architectually the same unit, just different software, that R197 mod should essentially be able to do both units, although I believe the N-1 lacks a little window with a silver sticker over it.  This means I'm gonna have to clear off my ESD table, get the static wrist strap out, and tear into my head unit.

This would not be the first time I opened my head unit.  I had an issue after installing some neon lights, which by the way had nothing to do with the stereo so don't ask me how it messed it up. 

I blew the ground open on the RCA's.  Yup, it did not sound good.  There were a bunch of bleeps, pops and the music sounded like it was an echo.

I measured the sleeves of the rca's to the chassis and they were a 200kohm open so I tore into it.  I found the culprit of the open in the bottom half of the unit on the tiny riser PCB that the rca's plug into.  I had to desolder the card from the chassis and on it was a tiny black pachage that had a FZ denotion next to it. (aha! a fuse!!!)  and I measured across it and wow, it had chassis ground  on one side and the rca ground on the other.  I replaced the part with aother smt fuse of similar amperage (I don't have a clue what the original part's specs were)

I do not suggest to open up your unit to work on it.  It is a very complicated device.  I only merely did it as I possess the knowledge on how to solder smt components, along with paste solder, flux, and a special heat gun (soldering irons can do more damage!!!)

I am going to further investigate on the web to see if anyone has tried the r197 mod on a N1 series unit before I tear into the compexities of my unit.

I would suggest while you have it open, to note the processor it uses.  Once this is found, i can almost bet if the binary is not encrypted, that we can disassemble the program.  Once this is done, i am thinking again from a vb programmer standpoint. that:

if sensor_pulses > 0 then disable_video watching   <--- or consider this

at the boot sequence, on the n1,n2 etc it is checking for this r197, so change the logic of this check to say always positive, so that soldering is not necessary. so in this case...

if r197 = soldered (true) then donotexecute_videocheck else execute_videocheck

does this make sense ?  I have IDA pro (Interactive disassembler) and some people i work with who do nothing but embedded software all day long.

The only info needed is the processor being used.  And to be safe, maybe inventory all the different chips which may look like processors, and it may offload tasks to other chips etc,

i was merely suggesting that the kwi format has some logic to it in the sense that if you replaced just the map data and kept all the program files, the dvd works, boots etc, plays video, but when you try to nqavigate to a place, it never knows how to.  The other confusing thing is when you goto search for new addresses in t he new database, previously known not to be found in the old database, it works.

Well I know that the N1 can load N2 software.  I have swapped it a dozen times working on a fix.  What fun it is to reflash that many times!  I am afraid I am going to wear out my flash chip!