"How- to" Access Advanced Ford PIDs Using a Scan Tool

[adelsin]

First Row, APP - Accelerator Pedal Position

Second Row, AWD_CLTCH_CMD - AWD Clutch Control Commanded

Third Row, AWD_CLT_DIAGSIG - AWD Clutch Diagnostic Signal


I'm assuming Second Row is the AWD engaging?

One is 0-60 with powerbraking... notice how the clutch control is commanded prior to full launch?

I'm chalking up not having the same settings due to being a 2013. :/

Other is normal driving down street. No traction slip.

 

[breeves002]

Looks like the AWD is working correctly! You can see how its getting ready for you to launch (not quite going full on, but close). Then you can see how you go WOT and it pops up to full on with you.

 

[breeves002]

So some new info today! Connected to HSCAN only to a 2013 SHO. Thank you to adelsin for the help! Our conversation got cut short, but learning new things every day!!



See we have the BdyCM for the Body Control Module which replaced the SJB for the 2013MY! Ran a self test on it and it honked the horn at people he was near heh! Interestingly enough it goes over HSCAN instead of MSCAN like the SJB on the previous years goes over. It may have an MSCAN section too, but we didn't get to that since his reader ONLY reads HSCAN.

It seems that the AWD module was removed for the 2013MY and is now built directly into the PCM! Interesting! Still need someone that has an OBDLink MX to please connect to MSCAN and show me everything on that side to confirm everything.

 

[adelsin]

I may be able to get with 4D and borrow his to see whats connecting. I wonder if I select no to hscan if it displays ms can??

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[breeves002]

I may be able to get with 4D and borrow his to see whats connecting. I wonder if I select no to hscan if it displays ms can??

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Possibly, I'm wondering if FORScan just can't display MSCAN through the STN1170 chip, and only through the ELM327 with a switch.... I'll have to do some research.

 

[breeves002]

Okay so the OBDLink Bluetooth is the STN1130 chip (I think) which CANNOT view MS-CAN data without adding a switch like you must do to the ELM327. The STN1170 is the only one that can do that without a switch as far as I know.

adelsin, if you can connect to yours again it should say in the log window what chip it is using.

 

[adelsin]

So if I modify my bluetooth one like in your tutorial, it should be fine?

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[breeves002]

So if I modify my bluetooth one like in your tutorial, it should be fine?

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Correct!

However lets make 100% sure its the STN1130 chip first. Connect to it again and in the log window and it should say the chip its using somewhere (ELM327, STN1130, STN1170).

Also since yours isn't an ELM327 clone I would be careful when you modify, that is an expensive scan tool! Just don't mix up the HS and MS-CAN and you should be just fine. If it looks completely different than mine does, post pics and I'll try and help you.

 

[breeves002]

I need to see a listing of any of the custom pids that might have anything to do with AWD.

Here you go...from Forscan with my MX adapter (using HS CAN)

Just saw this, thanks for posting! From the AWD computer?

Any chance you can connect with me over Skype and team viewer so I can see a few things with the OBDLink MX while connected to your car? That would be sweet! Or I can send you a PM with a few tests I'd like you to run.

 

[adelsin]

That was the 2011 I was telling you about.

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[breeves002]

Aha! Well if you guys can get together tomorrow and run a few tests that would be great. I won't be available until after 2pm, but if you run tests earlier thats fine.

See if there is an 'All' option under the modules you can select to record PIDs from. Then record things from MS-CAN and HS-CAN at the same time (select like the AWD clutch PID and the HVAC blend door position or something like that!). Also screenshot all of the different modules that pop up over MS-CAN on your 2013 with his OBDLink MX.

 

[breeves002]

Hey, so I talk to Lee, or 'behlinla', a Tech Advisor over on TCCA a lot and he helps me a ton on learning about things like this! So this wasn't all me!

He has some more to add to all of this after reading your posts. Why he doesn't just make an account.... I'm not sure! Here it is:

The AWD engagement is controlled by a active torque control coupling (ATCC) solenoid.  The percentage of torque going to the rear wheels is directly proportional to the amount of current going through the ATCC solenoid, which is normally controlled by a PWM 12V signal generated by the AWD module.  The AWD module communicates with the PCM over HS-CAN.  Torque vectoring is directly proportional to throttle angle and any detected front wheel slip.

In theory, providing a constant 12V source to the solenoid via something like a simple switch would force full lockup, but the problem there would be the possibility of axle wind-up if you are driving on a paved surface.  So I wouldn't think you want to have the axle at 100% for more than a few seconds.  Not sure if there is still some slip in the unit at 100% solenoid duty cycle or not to prevent damage.  Looking at scan data it looks like the module does run it at 100% for a few seconds.

The ideal solution would be an add-on box that provides the desired PWM signal to the solenoid that you could select.  I'm guessing it's a high-current solenoid, so the control box would have to be rated to handle it.  Perhaps something like those aftermarket turbo boost solenoid controllers would work.

Also not sure how the AWD module would react to having the solenoid being taken out of the circuit via a switch or having an external voltage applied, so that will probably cause trouble codes and possibly cause the PCM to enter a limp mode or limit torque in absence of a solenoid.  Someone should unplug the solenoid and see what happens.  You might be able to fool it with a resistor of the same value as the solenoid though.  So when you flip the switch it puts the resistor in place of the solenoid and then sends full 12V to the solenoid.  The other switch position puts it back to stock config.

Here's the diagram of the system on a 2011:  http://revbase.com/BBBMOTOR/Wd/DownloadPdf?id=875117

 

[adelsin]

What about all of the gander saying its limited to a mear 150 ft lbs of torque?

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[breeves002]

Hmmm. He isn't sure, nor am I. This system was designed for the regular taurus, not specifically the SHO, so I'm not exactly sure. I'm going to bed, but Lee is going to try and do some research.

Can an AWD dyno measure just the power output from the rear wheels??

 

[adelsin]

Hmmm. He isn't sure, nor am I. This system was designed for the regular taurus, not specifically the SHO, so I'm not exactly sure. I'm going to bed, but Lee is going to try and do some research.

Can an AWD dyno measure just the power output from the rear wheels??

That was what I wanted. Wanted to call around tomorrow. Since Im seeing different results than the pre2013 users, I might to try to add some more power. Based on my results so far, it appears that I am in fact getting full or mostly full engagment of the rear assembly at launch. I also want to try some hard turns with it on.

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[ecoboostsho]

In theory, providing a constant 12V source to the solenoid via something like a simple switch would force full lockup, but the problem there would be the possibility of axle wind-up if you are driving on a paved surface.  So I wouldn't think you want to have the axle at 100% for more than a few seconds.  Not sure if there is still some slip in the unit at 100% solenoid duty cycle or not to prevent damage.  Looking at scan data it looks like the module does run it at 100% for a few seconds.

The ideal solution would be an add-on box that provides the desired PWM signal to the solenoid that you could select.  I'm guessing it's a high-current solenoid, so the control box would have to be rated to handle it.  Perhaps something like those aftermarket turbo boost solenoid controllers would work.

Also not sure how the AWD module would react to having the solenoid being taken out of the circuit via a switch or having an external voltage applied, so that will probably cause trouble codes and possibly cause the PCM to enter a limp mode or limit torque in absence of a solenoid.  Someone should unplug the solenoid and see what happens.  You might be able to fool it with a resistor of the same value as the solenoid though.  So when you flip the switch it puts the resistor in place of the solenoid and then sends full 12V to the solenoid.  The other switch position puts it back to stock config.

I would caution you to be careful with this approach.  I agree that sending a full 12V to the circuit would certainly cause the solenoid to fully engage however the solenoid will have some maximum rated current before it burns up.  If the PCM had a current limiting circuit (i.e. a resistor) in line with this output and you bypass it with 12V directly to the solenoid I can assure you very, very bad things will happen in the blink of an eye and you will be left with a non-functioning AWD system.  That is why I suggested we either obtain the rating on the solenoid or measure the current system output at 100%.  Unfortunately you can't do that by "tapping" in to the wires.  You can only measure voltage that way.  To measure current output you either need to be inline with the circuit or measure it inductively.  A vampire tap won't cut it.

FWIW I am a former electrical engineer turned IT manager and I'm not trying to discourage you from experimenting just cautioning you to do so carefully.  I'd hate to see anyone burn up their stuff! 

 

[ecoboostsho]

I need to see a listing of any of the custom pids that might have anything to do with AWD.

Here you go...from Forscan with my MX adapter (using HS CAN)

Just saw this, thanks for posting! From the AWD computer?

Any chance you can connect with me over Skype and team viewer so I can see a few things with the OBDLink MX while connected to your car? That would be sweet! Or I can send you a PM with a few tests I'd like you to run.

Yes it was from the AWD computer.
I will try and pull a few parameters from the HS CAN and MS CAN later today with my MX to see if it is possible without modifying it.

I am willing to help however I can but my wife and I actually just had a set of twins 4 weeks ago so I have my hands full over here!  I don't know that a timed event via Skype would work for me but I would be willing to help via a PM if you can be patient with me.

 

[SHOdded]

Congrats, ecoboostsho, on the twins!

 

[adelsin]

Congratulations! !

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[ecoboostsho]

Thanks guys!