PID experimenting

[fordtruckman2003]

I'll see if I can get odometer tomorrow to see what you talking about.

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[fordtruckman2003]

I was confused this morning due to typo I was getting short term fuel trim not odometer. ?

I'll try again going home.

Built in Torque PID is definitely psycho.
Says truck has 79 million miles...

 

[Cobraman428]

Man, I haven't been watching this thread in a few days, and it looks like you guys unlocked the PID Holy Grail while I was gone.... Can't wait to see what happens next... Keep up the good work guys...

 

[fordtruckman2003]

Can spam truck on mode 22 but no idea what the data is supposed to be on response. Not fond of that idea.

 

[fordtruckman2003]

Tada...

 

[fordtruckman2003]

Torque...

Long name can be whatever you fancy, I put my custom PID in brackets and differentiate them from the other [FORD] PID I have loaded. Makes easier to find but do what you want.

Odometer from 01A6 is in KM and full number.
So 12345 is really 1234.5 km.
That is why divide by 10.
You have to put the whole equation inside parentheses because Torque won't divide by 10 if you don't.

Put the unit type as km, torque automatically converts metric to standard if you have it setup in your settings.

INT32 is Torque only function not in OBDLink. It just returns a 4 byte 32 bit number.
Without that you would need to use the formula to convert into a 32 bit number the hard way...

OBD2 mode and PID: 01A6
Long Name: [FordEco2.7] Odometer
Short Name: Odometer
Max value: 500000
Unit type: km
Equation: ((INT32(A:B:C:D))/10)

This just shows the math Torque is doing step by step and you can see the truck value broken down A thru D as is the OBD2 standard.

 

[oneinch]

@fordtruckman2003, I bow to you. I entered the Odometer PID using your info and indeed it works. It's a hair off, but close enough for government work. My mileage is 16,377.3. The PID read 16,376.9.

I haven't the slightest idea how you figured this out, but you did it.

 

[fordtruckman2003]

@fordtruckman2003, I bow to you. I entered the Odometer PID using your info and indeed it works. It's a hair off, but close enough for government work. My mileage is 16,377.3. The PID read 16,376.9.

I haven't the slightest idea how you figured this out, but you did it.

That is odd. Mine was fully accurate.
Did your truck have the gauge cluster replaced at some point? ?

 

[Snakebitten]

I'm not saying that I'm not impressed by his seemingly effortless ability to parse that equation.
But I'm FAR more amazed that he can Wireshark, or packet sniff, or however you should describe what he did to harvest the oil pressure Pid from Forscan. That was cool!

Makes me wonder why these pids can be so elusive on the world wide interweb? ??

 

[fordtruckman2003]

Far as I know that was the only "missing" PID not out in the wild yet. I just did what I read on old forum post and looked what Forscan was doing. No different than how Forscan looked at what Ford software is doing when they created Forscan. I have no interest in fully reverse engineering Forscan. I'm a happy paid customer.

 

[Spidergears]

Obd link has a warning for the user defined pids. I’m not sure what kind of bad things can happen. Anybody broken anything on their truck with a user defined pid?

 

[fordtruckman2003]

Obd link has a warning for the user defined pids. I’m not sure what kind of bad things can happen. Anybody broken anything on their truck with a user defined pid?

Warning on every app. People have been using custom PID across many brands and vehicles since the apps came out. You could send something on the bus that would cause issues but it is unlikely.

 

[fordtruckman2003]

From what I can tell by online browsing Ford only put oil temperature sensors on diesel trucks. Some mentions of that comes up on power stroke forums.

 

[PB2021]

While I'm bored fooling around anyone else have a PID that they can't find in OBDLink? ??

First of all thank you for finding the route to pull oil pressure. This is awesome to have on Powerboost. Wondering out loud here - what are the odds of tapping into the weigh scale option through a PID formula? 502a and higher all have the auto level LED lights and I believe the same sensors are used to feed calculations for weigh scales. Even if we don’t have the option on the dash might this be something that can be displayed through MX+ ?

 

[fordtruckman2003]

First of all thank you for finding the route to pull oil pressure. This is awesome to have on Powerboost. Wondering out loud here - what are the odds of tapping into the weigh scale option through a PID formula? 502a and higher all have the auto level LED lights and I believe the same sensors are used to feed calculations for weigh scales. Even if we don’t have the option on the dash might this be something that can be displayed through MX+ ?

Not something I have and if it's not in Forscan it probably isn't possible.

There is a lot of traffic on the CAN bus and I used to play with injection of my own commands on my Gen 12 but the Gen 14 is far more complex with tons of modules. I'm not really comfortable just throwing out data into that sea. Might cause a crash somewhere.

Something repeatable in a pattern can be inferred off logging all the CAN traffic but I don't see how you can do that with scales. It might be possible if scales work with truck off when bus has little traffic but it could be on a totally different bus too. I don't know anything about the LIN that connects some modules.

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