Originally Posted by JimQldAust
I'm going to look for that OBD Facile App. I have an Android phone.
Yes that's the only app i could find with more of the OBD parameters that seem to be supported by the Jeep. ( For me, the app keeps dropping the connection to my OBD dongle so its a bit of a pain)
The "Normalized DPF % " is one of the standard parameters (not a Jeep proprietary one), so i'm waiting to see if it is actually the one used by the jeep.
Its not on this Wikipedia page either: OBD-II PIDs - Wikipedia, the free encyclopedia
It's not the first time wikipedia has failed me.
I managed to work out the codes for that parameter it so now i've entered it as custom PID item on a "dashboard" on another more stable app.
The DPF data is accessed with Mode 1 - PID 8B which gives 7 bytes of data.
The first byte "A" gives the info of which of the other 6bytes are supported.
2nd one, byte "B" is the current Regen status and SCR status in bitwise form.
3rd one , byte "C" is a value which is a calculated value to display as a percentage.
Originally Posted by standard SAE J1979
DPF_REGEN_PCT shall indicate the normalized DPF loading, time, distance, drive cycles or other criteria before the next DPF regen where 0% means the DPF is clean (a regen just occurred) and 100% means the DPF is fully loaded. When there are multiple criteria to trigger a regen, the one that is closest to triggering the regen shall be displayed.
The byte range is from 00000000 to 11111111 which is 0 - 255 in decimal.
if we are scaling it from 0-100% the equation i used is: C*100/255
Some apps like "Torque" will let you add your own custom PIDs if you know the address and the scaling equation.
I entered it as a custom in my app like this:
Name: DPF % full
units : %
This displays a percentage which matches OBD facile.
my Dashboard display looks like this
As you can see it's filling up 28%
earlier this week it was 16%.
I'm assuming that Jeep scales from 0-100% for their EVIC. maybe they think 120% full is a valid number.
Waiting for it to get to 80% or 100%. see what happens