ScanGauge and the FEH

[CarlD]

There has been some interest in retrieving diagnostic data from the FEH using the ScanGauge, so I thought I'd give a brief description of how to do it. First, start by reading this on SG's web site:

http://www.scangauge.com/support/OBDIITestStatus.shtml

In the FEH Powertrain/Emissions Diagnostic manual, mode $22 PIDs are described on pages 2-12 through 2-16. Unfortunately, scaling and offsetts are not provided, but I have figured most of them out through experimentation. Also unfortunately, I have not found a source for the TBCM PIDs, except for a few.

At any rate, on your ScanGauge press MORE>MORE>CMNDS the default is Memory 0, but you have 10 to choose from. Press EDIT, then enter the mode and PID using the <> and ^ buttons. For example, the PID for the Traction Battery Voltage is $490B in mode $22.
So, use the ^ button to step up to 2, then > and repeat for the next 2, > and ^ to step up to 4, then 9, 0, and B. You should have 22490B in memory 0. Press OK and then SEND. You will get back something like 62490B2E83. The 62490B indicates a repsonse to the request, the 2E83 is the hexadecimal representaion of the voltage. The scaling is .03052 for this PID, so to get voltage you calculate the decimal value and multiply by .03052.
2E83 hex =2*4096+14*256+8*16+3=11907, and voltage =.03052*11907=363.4V.

I can't reliably get the TBCM PIDs, of which SoC is one, with the SG, but I think Ron can figure this out. I will post my list of scaling and offsets for the PIDs, and hopefully they can be verified and/or corrected by the masses.

[GPS_MAN1]

Luckily, for the Generator and Motor RPM there is no scale of offset.

If you get 0xxx this is forward motor spin.
If you get Fxxx this is reverse motor spin.

And BTW, do you think you can have 16 presets?

In mine, I got it to go 0-9 and A-F.
My A-F were there one day, then whammo... they disappeared.
Wonder if I "unlocked" something.

I also got my SG to display in Chinese and Greek!
( again, I'm not sure how, I was just pressing buttons, and it happened, luckily, I could reset it... )

So looks like Linear Logic sells to the Asian market, as well as Europe!

[brick]

Hi, Carl.
Today I was thinking, a lot of this information (SoC, battery current, MG speeds, etc.) can be valuable as a real-time feed. Obviously it's impossible for you to program every last parameter for every last car, but what do you think about a "custom" field that the user could experiment with? I guess it's basically the same thing you have now except for updating on its own rather than sending the command and getting a freeze-frame reply back. (I haven't tried it myself but I believe that's how GPSMAN explained it.)

Does that sound totally nuts?

[CarlD]

Originally Posted by brick

Hi, Carl.
Today I was thinking, a lot of this information (SoC, battery current, MG speeds, etc.) can be valuable as a real-time feed. Obviously it's impossible for you to program every last parameter for every last car, but what do you think about a "custom" field that the user could experiment with? I guess it's basically the same thing you have now except for updating on its own rather than sending the command and getting a freeze-frame reply back. (I haven't tried it myself but I believe that's how GPSMAN explained it.)

Does that sound totally nuts?

I think that is Ron's intention with the firmware upgrade he is working on. In the present gauge mode, he is sending his selected subset mode $01 PIDs as defined by SAE J1979 (see wikipedia). The mode $22 PIDs of J2190 are manufacturer specific, so he will probaly have to make it user programmable, and provide a list on the website if he can legally do so. If you have a SG, an '04 Prius is CAN, so you can send PIDs to see what comes back. After all, since Ford is using Toyota technology, the PIDs should be the same, right?

[CarlD]

Originally Posted by GPS_MAN1

Luckily, for the Generator and Motor RPM there is no scale of offset.

If you get 0xxx this is forward motor spin.
If you get Fxxx this is reverse motor spin.

I thought that I had determined that these were represented by either 1 or 2's complement format; the Fxxx would be an unorthodox method of representing negative numbers and would limit it to 4095 RPM max. I will try driving in reverse and seeing what the TM value comes back as; I may have to change that entry in the excel spreadsheet!

[GaryG]

Originally Posted by CarlD

There has been some interest in retrieving diagnostic data from the FEH using the ScanGauge, so I thought I'd give a brief description of how to do it. First, start by reading this on SC's web site:

http://www.scangauge.com/support/OBDIITestStatus.shtml

In the FEH Powertrain/Emissions Diagnostic manual, mode $22 PIDs are described on pages 2-12 through 2-16. Unfortunately, scaling and offsetts are not provided, but I have figured most of them out through experimentation. Also unfortunately, I have not found a source for the TBCM PIDs, except for a few.

At any rate, on your ScanGauge press MORE>MORE>CMNDS the default is Memory 0, but you have 10 to choose from. Press EDIT, then enter the mode and PID using the <> and ^ buttons. For example, the PID for the Traction Battery Voltage is $490B in mode $22.
So, use the ^ button to step up to 2, then > and repeat for the next 2, > and ^ to step up to 4, then 9, 0, and B. You should have 22490B in memory 0. Press OK and then SEND. You will get back something like 62490B2E83. The 62490B indicates a repsonse to the request, the 2E83 is the hexadecimal representaion of the voltage. The scaling is .03052 for this PID, so to get voltage you calculate the decimal value and multiply by .03052.
2E83 hex =2*4096+15*256+8*16+3=12163, and voltage =.03052*12163=371.2V.

I can't reliably get the TBCM PIDs, of which SoC is one, with the SC, but I think Ron can figure this out. I will post my list of scaling and offsets for the PIDs, and hopefully they can be verified and/or corrected by the masses.

Thanks Carl for joining and posting on Cleanmpg, and welcome to our group here. The top hypermilers in the world are here and will return the help you shared today with their knowledge. Glad to have another fellow owner like you here.

GaryG

[GPS_MAN1]

Carl, I'm sure you know what you are doing and I know what I am doing, but I may not know what I am saying!

I'm thinking of it like a clock, where midnight can be 0:00h or 24:00h.
With the motors, standing still can be 0000 or FFFF.

Reverse is like this: (counter clockwise)
FF48 183 from zero in the negative direction
FEAE 337 from zero in the negative direction
FE19 -486
FD8A -629
FCEB -788

Or you used the term "complementary" which is totally correct.

FFFF - FF48 = 183
FFFF - FEAE = 337
FFFF - FE19 = 486

But you have to remember the negative sign!
-John

[GaryG]

Carl, take a look at this information regarding OBD11 for the FEH:
http://www.motorcraftservice.com/vdi...DSM500_HEV.pdf

GaryG

[GPS_MAN1]

Carl, I'm finding out that the lower register of mode 22 is the same as mode 01.

Therefore, there is a lot of redundancy.
And if it helps anything, you don't have to change modes to get EVERYTHING.

For example: engine coolant temperature returns on both:

0105 and 220005.

All I can see is $22 required 2 extra zeros.
It did not work with simply 2205.
???

Intake Air Temperature works on both:

010F and 22000F

Am I seeing a pattern here?
I suspect the first 50-60 codes overlap at the bottom of the list, and then from 60-250 the codes are in $22 alone, and that's were we get the hybrid ones.
Have more testing to do!
-John

[CarlD]

Interesting PID I have found for the FEH....mode 22 PID 16C3 is "octane flashed into vehicle at final assembly during spark test" mine is set at 5B, which is 91 octane! What does everybody else have in their FEH for this?

I am nearly ready to publish my list of PIDs for the FEH, pending some final scrubbing of the offsets and scalings. Over 200 PIDs and counting....