Recent content by NickInMN

I've been slowly trying to learn more about the J1850 VPW, specifically the GM flavor. This all started as a "simple" project to get the Oil Life and Fuel Filter life data from my Duramax ECM. At first I was just brute forcing things looking for very specific messages. Over the last few weeks...

Executing that request over Class 2 didn't seem to generate a response. I haven't been able to make any progress on this. I emailed EFI Live asking if they've seen issues with the Oil Life Monitor and the DSP5 and they replied they haven't and it is either a wiring or ECM problem. I'm not...

Oh, I see what you're saying. I see PID and immediately think CAN. I can try sending that request. I'm not sure if that same request will work on my hardware but I can give it a try.

When I reset the oil life via the pedal dance I see the "Oil Life Reset" message on the DIC. The Oil Life then shows 100%. As soon as I make the request for oil life the PCM responds with 0. That results in the oil life showing as 0% in the DIC. I don't follow what you're asking with respect...

I've been distracted with other things but I finally got back to this yesterday. I have ruled out this being a power issue. If I send a reset message through the Tech2, by doing the pedal dance or through the Arduino the IPC shows 100%. However, as soon as I make a request for the data (E9 4A...

Interesting, so there are quite a few steps involved. You've piqued my interest in that regard. I started writing an application that will parse a log file line by line and break it out into easier to read data. Would you be willing to share the j1850 lookup data you have? For the task at...

Thanks for all your input. I haven't had a chance to test this but I think your data points me in the right direction. My code is currently looking for A8 4B 10 14 as the identifier for the oil life message. I think that's part of my problem, I'm assuming the priority part will always be the...

When the truck is started the following message is sent 0xA8 0x4B 0x10 0x14 0x[XX] (this is oil life, fuel is behaving the same). 00 == 0 %, FF == 100%. I'm not requesting any data. I see this same message when I reset the oil life with my Tech2 clone as well. My ASSumption is that when the...

I'm working on a device for my 1997 Hummer with an LBZ Duramax swapped in. I am using an Arduino and a VPW Transceiver from SwapSmart to access the Class 2 data bus. I have most of the class 2 data working but I'm struggling with one thing, the Oil Life Monitor and Fuel Filter Life. I have...