Originally Posted by goalie39
The only modifications I made to the 4Runner were to add a transmission cooler and get a cheap OBD2 scanner to read the transmission temp on my cell phone.
If you are using TorquePro app you might be interested in this thread which shows how to get trans temp info from second temp sensor that is already installed in your vehicle.
One sensor shows temp before the cooler, the second is located after the cooler. I did it and it works fine. You can really see what the torque converter does to trans temp.
Edit: link didn't go exactly where I wanted. Within the link you can page back to Post #1 and find this:
First, you have to have a bluetooth OBD reader, like the one I got from Amazon for $15. I bought one that had a lot of positive reviews, and it was labeled "ELM327". Here is the link:
Amazon.com: iSaddle Super Mini ELM327 V1.5 OBD2 OBD-II Bluetooth CAN-BUS Auto Diagnostic Tool for Windows XP, Vista, Win7, OSX and Android (Blue Color): Automotive
You will also need to purchase the paid version of Torque, which is $5.
Once you have it on your phone/tablet, make sure you download the free "Torquescan" app. It is an addon, so it will not appear as a separate app. Once it downloads, it is made a part of the Torque app and will appear as an option in Torque.*
Once in Torque for the first time, setup your vehicle profile, which will enable you to start using the app.*
From the main screen, hit your menu button, then choose "Manage extra PIDs/Sensors"
Hit the menu button again, and choose "Add custom PID"
Under the first item called "OBD2 Mode and PID" enter "21d9"
Under "long name" choose whatever you want. I typed in "Trans Custom"
Under "short name" choose whatever you want. I typed in "Trans"
Under "minimum value" leave it at "0" or type in "0"
Under "maximum value" type in "300"
Under "scale factor" leave it as "x1" or type in "x1"
Under "unit type" type in "F"*
Here's the tricky part - under "equation" type this in, EXACTLY, without any spaces:
That's *five* parentheses at the beginning! Just be sure that there are six total parentheses facing to the right, and six total to the left.
Leave the rest blank and hit "OK"
Now when you want to add a gauge to the display, you should see "Trans custom" or "Trans" or whatever you named it at the beginning. The darn thing works!!!!!
Post #22 gives formula for Celsius.