Tire Pressure Monitoring

[marlinpruett]

When did the Expeditions start sending actual tire pressures readings via the TPS systems?
I have an after market Kenwood radio/GPS that monitors engine data including the TPS System. The info on the Kenwood shows actual pressures being displayed on the tire pressure screen but mine only shows a green condition ( pressure OK) or a red condition (pressure is low) for each tire.

 

[LokiWolf]

When did the Expeditions start sending actual tire pressures readings via the TPS systems?
I have an after market Kenwood radio/GPS that monitors engine data including the TPS System. The info on the Kenwood shows actual pressures being displayed on the tire pressure screen but mine only shows a green condition ( pressure OK) or a red condition (pressure is low) for each tire.

I know the 15-17’s send actual Tire Pressure from the Sensors to the BCM, but no way to display that data because of the fact they Truck does not have a DDM(Module used in other Ford vehicles to display that Data).

You can see the Data with higher end Scanners or Apps with WiFi or BT OBDII adapters.

 

[WifeyExpedition]

Our '16 only has a light that shows a low pressure. No info on which tire. Kind of aggravating after having an '07 Tahoe that showed individual tire pressure.

When did the Expeditions start sending actual tire pressures readings via the TPS systems?
I have an after market Kenwood radio/GPS that monitors engine data including the TPS System. The info on the Kenwood shows actual pressures being displayed on the tire pressure screen but mine only shows a green condition ( pressure OK) or a red condition (pressure is low) for each tire.

Sent from my Pixel 2 XL using Tapatalk

 

[LokiWolf]

Our '16 only has a light that shows a low pressure. No info on which tire. Kind of aggravating after having an '07 Tahoe that showed individual tire pressure.

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Again, The data is there, the ability to see it is lacking with in the OEM displays.

 

[WifeyExpedition]

What is the easiest way to show it short of manually checking each tire?

Again, The data is there, the ability to see it is lacking with in the OEM displays.

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[LokiWolf]

What is the easiest way to show it short of manually checking each tire?

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Let me see if the free FORSCAN Mobile app can see it when I get home this afternoon. I am out and the Wife is Home with the Expedition. I will also try my Amazon cheaper wireless reader.

 

[JExpedition07]

My 07’ also just gives a warning in the message center and a light if it gets low (I believe below 30 psi). Not sure if the computer actually knows the true pressures I assume it does if you use aftermarket setup that can access it. Otherwise the sensor would have to be the “brain” and know what is too low, this likely isn’t the case. If I remember correctly my owners manual states the TPMS sensors report pressure to the computer every 3-5 minutes and if it is below a threshold the computer sets off a warning. Info is likely there but we can’t access it.

 

[LokiWolf]

My 07’ also just gives a warning in the message center and a light if it gets low (I believe below 30 psi). Not sure if the computer actually knows the true pressures I assume it does if you use aftermarket setup that can access it. Otherwise the sensor would have to be the “brain” and know what is too low, this likely isn’t the case. If I remember correctly my owners manual states the TPMS sensors report pressure to the computer every 3-5 minutes and if it is below a threshold the computer sets off a warning. Info is likely there but we can’t access it.

Yep, Sensor makes no decision just sends the Data.

The set point can be adjusted via many programmers and FORSCAN. I use my Hypertech to increase the set point. The set point is the desired pressure not the point at which to alert.

 

[LokiWolf]

Got a Setup that works...

This is on an iPhone Xs Max Running iOS 12.0.1

I am using a Kiwi 3 Adapter, the OBDFusion App(Free) with the Enhanced Ford Diags for 2017($9.99).

Add the Tire Pressure PIDs from the BCM(Body Control Module) to the Diag PID Screen. Sure I can add it to a DashBoard, but haven’t gotten that far.

 

[LokiWolf]

Here you go, for those that don’t take my word for things lately.


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[marlinpruett]

Here is a picture of my Kenwood vehicle info screen in my 2007 Expedition EL Limited. When a tire is low the green boarder around the rectangle turns red. The dash indicator for low tire pressure also comes on.
In the Kenwood manual it shows actual tire pressure readings inside the green rectangle.
Hope this is clearer.
My question- Is there a way to get the kenwood to display the actual pressure reading?
It gets info and displays actual readings for voltage, engine temp, rpm,oil pressure, and lots of other parameters.
As info, the Kenwood is connected to the expedition OBD
I felt that if it gets actual readings for all these parameters then air pressure should be available.

 

[JExpedition07]

Maybe our tire pressure sensors just have two signals they send to the computer “good” or “no good”? It’s possible they don’t send any pressure data I guess. Possible the kemwood can’t access it in our model as well.

I replaced my TPMS sensors after a battery died with the AirTex (OEM), so I did a little bit of reading into them but nothing deep.

 

[LokiWolf]

Here is a picture of my Kenwood vehicle info screen in my 2007 Expedition EL Limited. When a tire is low the green boarder around the rectangle turns red. The dash indicator for low tire pressure also comes on.
In the Kenwood manual it shows actual tire pressure readings inside the green rectangle.
Hope this is clearer.
My question- Is there a way to get the kenwood to display the actual pressure reading?
It gets info and displays actual readings for voltage, engine temp, rpm,oil pressure, and lots of other parameters.
As info, the Kenwood is connected to the expedition OBD
I felt that if it gets actual readings for all these parameters then air pressure should be available.

When using the same PIDs on the Expy that I used on my Edge for testing it did not work.

The PIDs were slightly different for the Expy.

The things you mentioned are standard OBDII PIDs. The Tire Pressure ones are extended/enhanced. That could be the difference.

Does the Kenwood have the ability to edit the PID?

 

[LokiWolf]

Maybe our tire pressure sensors just have two signals they send to the computer “good” or “no good”? It’s possible they don’t send any pressure data I guess. Possible the kemwood can’t access it in our model as well.

I replaced my TPMS sensors after a battery died with the AirTex (OEM), so I did a little bit of reading into them but nothing deep.

Did you see my images above, clearly not just a good/bad signal?

Now there is the possibility(Small) that the earlier 3 Gens might have different sensors. But as was mentioned before that would make less sense. It makes more sense that the sensor just sends pressure and the BCM makes the decision. That allows different set points. A sensor that sends good/bad would have to have the set point hard coded and make a logic decision.

 

[JExpedition07]

Did you see my images above, clearly not just a good/bad signal?

Now there is the possibility(Small) that the earlier 3 Gens might have different sensors. But as was mentioned before that would make less sense. It makes more sense that the sensor just sends pressure and the BCM makes the decision. That allows different set points. A sensor that sends good/bad would have to have the set point hard coded and make a logic decision.

I’m not saying your 2017 doesn’t send that data, it clearly does. I’m saying the 2007 may not send any data and just be a “good” or “no good” situation. Your right likely not the case, I’m sure the sensors send the data to BCM and the Kenwood can’t access it like a scanner.....just throwing the possibility out there.

 

[bobmbx]

Here you go, for those that don’t take my word for things lately.


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You're such a boofer.

/s

 

[LokiWolf]

You're such a boofer.

/s

[emoji23][emoji23]

 

[marlinpruett]

Here are pictures of some of the parameters the Kenwood is detecting. The only ones not detected are marked "x"'.

 

[LokiWolf]

What Model is the Kenwood?

 

[marlinpruett]

DNX874s