So here I am, having identified to my satisfaction my Oil Pressure Switch. Then I use a function that will substitute a word for each of the possible values, 1 or 0 to make the display more user friendly. To use these PIDs I split out the particular bit of information I need from the hex byte that the PCM returns and I get either a "0" or a "1". Each of those 1s and 0s could represent a switch or command such as power to a relay.Īgain, I will say I have only my 2002 4.2 to test with. The hex byte returned by the PCM when converted to a binary display would look something like this: 10011010, which is a binary representation of hex 9A. I've come across a few of these PIDs and have identified a handful of possible items and a couple that I am fairly certain of. We have a bunch of stuff that isn't a floating value but rather a simple "On or Off", "Yes or No", "Good or Bad", or whatever words you would use. Sometimes the single byte result of a PID is actually a combination of up to 8 different parameters. I have no knowledge of the original source of this -40 degree offset information so I cannot speak to its accuracy but the adjustment I made sets me up good at cold temps and I will watch it for a while when hot to judge the accuracy there. I believe the offset is there so they don't have to deal with the possibilities of a "negative hex value?" I often see the A-40 equation in Torque extended PIDs and Torque takes care of the conversion to Fahrenheit where desired. The PCM reports the temperature as a hex value in Celsius with an offset. With the standard equation of A-40 I was seeing dead cold temps of 42.8F when my transmission and coolant and air temps were like 58F to 60F. PID = 221154 (append "01" for faster response in Torque Now I will preface this that I have altered the equation based on just a few observations of dead cold temperatures. Recently saw a dealer bulletin online that indicated there were some early 2003 units that had various parts of the hardwares but not the programming. That's right, only for the 2002 model year. Without the "01" appended there is a noticeable delay in the initial response time. You can see this using the test button in Torque while connected to your vehicle. At first look I believe once Torque gets the answer it was seeking it remembers the format for the duration of that session but not further. Then Torque adds the "01" to the end of the PID, as in this case would be 22162B01, and bingo, the PCM answers with the data requested on the first request, speeding up the original startup at least. Torque sends the same request again and is again rejected. When set to "Auto" (CasE sEnSiTiVe) Torque first sends the PID as entered in the extended PID definition and with many of the PIDs the PCM essentially rejects the request. I snooped the Class 2 bus while using Torque and found that with the "header" left blank many extended pids fail. Since that other post I have discovered that if one adds an "01" the the end of these extended PIDs the Torque app will receive the data quicker from the PCM as Torque won't need to cycle through formats seeking an answer from the PCM. Header should be set to "Auto" (cAsE sEnSiTiVe) and the equation is "A * 16". 22 being the mode or service and 162B the actual PID. So as posted elsewhere the PID for Fan Speed to enter into Torque extended PIDs is 22162B (I confirmed only on a 2002 4.2). I have been spending a great deal of time fiddling with these PIDs of late and have additional informations that I will post on this thread. It is possible that this is my first original post! It was properly suggested by MRRSM that I repost that information here so here I am. Thanks a lot! I would like to go to the Nordschleife tomorrow and hope that someone can give me the information today.A short time ago I posted a new pid I discovered for the Fan Speed of a 4.2 in a 2002 Trailblazer. How do I get this information integrated into Racechrono? Can you explain this to someone? Is it possible to change this using the equation from the normal preset engine oil temperature gauge? Around 90 degrees it is about the same below it shows less, above it shows a little more. The problem here is that it does not always show 1:1 the same temperature as in the gauge. This PID information is listed at torque as gearbox temperature, but it shows the oil temperature. Transmission Oil Temperature PID that works 100% right for Mercedes W204: The engine oil PID is sometimes a little bit less and sometimes a little but more as on the real dashboard. There is also another trans oil option, but it seems like, if that will be the engine oil. With torque, there is one option that works with the Trans Oil to 100% right.
#Torquk pro gm extended pid list trans temp android#
So I bought a old android phone and torque pro.