It's not for everyone.


Bosch developed it and man do they have an abundance of info on their site.

I have found reference to a proprietary N-Bus architecture that Nissan is evidently using for at least the Audio. It's suppose to be based on Clarion's CeNet but as of this moment that's all I've found. I'm starting to gain confidence in my theory that proprietary architecture is why there isn't a programmer yet for our trucks, but I just haven't found any definitive proof yet.

At the last meet I was at, jerseyparts was there. He said something along the lines of the feds made Nissan use a standard connector for the OBD port instead of the proprietary one they had been using. The CONSULT unit and the OBD ports use a different number of pins. So the Titan has the standard port, but not all the pins are used.
The CONSULT II he used to advance the timing on our trucks had an extra dongle on it for connecting to the OBD port.

This is likely one of the reasons the ECU hasn't been cracked yet. People are trying to reverse engineer something that isn't standard. The Titan probably has the most "advanced" or "closed" version of the system to date since it's the newest design.

Bottom line? Nissan doesn't want anybody messing with "their" computers.

__________________
05 KC SE Smoke
01 Suzuki 600 GSF
88 Fiero 2M4

Delete.. oh dag nabbit.. I was thinking this thread was about the CAN interface module you posted a while back. Nevermind.

__________________

My first realization about the CANbus came as I started to research my cure for the phantom seat controls. When I pulled the switches and connectors, I realized that there were fewer wires than I expected. I was wondering how all those switches could operate with only two wires exiting the module.

Well, after looking at the wiring diagram and trouble shooting diagrams, it became apparent that the switches were sending different voltages down the wires and the BCU was decoding those voltages into different actions. That was when I realized the only way I could control all of the switch functions was to control the power wire. It actually made my "fix" easier.

Look at the gas pedal. Now, it is fly by wire. So the controller can modify your input to reduce acceleration or improve gas mileage without your knowledge. In the old days, the only way to mechanically modify your foot's input was to attach the accelerator pedal cable to a cam to change your input.

So in this case, the Cam has been replaced by the CANbus.

Red

__________________
2005 Titan KC SE, Helwig, True-Track, ARE MX Canopy

Every vehicle sold in the US since 96 must be OBD2 compliant - that means an OBD2 port and a standard protocol, insofar as the required functions are concerned.

OBD2 is an EPA requirement (and, of course CARB... because California always has to be special) aimed at emissions monitoring. Certain information must be accessible via the OBD2 port using the standard OBD2 protocol.

As far as Nissan being forced to use a standard OBD2 connector - yes, every automobile sold in the US is requird to use the standard OBD2 connector. Providing the required functionality is intact via that standard connector, there is nothing preventing an OEM from also using 20 other connectors, each proprietary in shape and protocol.