Does OBD or Forscan show Cabin temp?

[MrLoganRoss]

I am wondering whether any of the tools we have access to will show us the cabin temp, which presumably would influence the hvac system.

then of course, the question is whether one can program in an offset or calibration.

Thanks.

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[Runaway Tractor]

I am wondering whether any of the tools we have access to will show us the cabin temp, which presumably would influence the hvac system.

then of course, the question is whether one can program in an offset or calibration.

Thanks.

Yes it does. There are a few interior and exterior temperature sensors that are readable. No you can't change them. Unsure why you'd want to??

 

[MrLoganRoss]

I have some other threads where I discuss working through the hvac experience vs what the car offers (which is different than my Mache).
They just replaced the blower motor. Heating is better. I also just changed the cabin air filter.

The issue seems to be more about when it decides to heat (especially on Auto) vs whether the car heater is working. I am hoping to compare OBD to a legitimate scientific thermometer I bring into the cabin.

 

[MrLoganRoss]

Yep. Tend to need to set the temp to at least 78

 

[MrLoganRoss]

When you say raw data, what do you mean? Thx.

 

[MrLoganRoss]

Car scanner is showing me internal temp

 

[astrand1]

Yep. Tend to need to set the temp to at least 78

You need to set it to 78 for what?

 

[TaxmanHog]

Yep. Tend to need to set the temp to at least 78

I've found 78° setting on the control creates a comfort level for our needs, can't say that it's accurate or not based on what the HVAC system is measuring as an input to cycle the PTC or VHP system to generate more heat.

 

[MrLoganRoss]

So it’s obviously not right near the driver’s head, but knowing how it reacts relative to how I feel lets me correlate. It’s in a spot where closer to the vents than I am.

I tracked it on the way home from a restaurant, including how it changes when I change the temp. It’s clear that at a certain point the system thinks it’s hotter than it is.

however, the info has been helpful and over the next few weeks I will test my ability to quickly adjust temp in a way that keeps me comfortable for the entire drive (harder as most of my drives are 20 minutes or less).

as a side note, my battery is at 100% health after being in service for 9 months.

 

[mrau]

FYI, the outside temp sensor is under the passenger side mirror. Not sure where cabin sensor is, but may look similar.

 

[MrLoganRoss]

Ok, with access to Car Scanner and a decent scientific thermometer, and testing with an outdoor temp of 48 degrees, my test shows that the car’s interior temp deviates from the actual temp by being between 2 degrees and 4. 5 degrees higher (let’s call it an average of of 3-3.5 degrees).

That explains why I generally need to set the temp to 75 degrees.

To be fair, I think the scientific thermometer reacts slowly and so I want to rerun the test with a fast acting thermometer.

The goal is really just to recalibrate my thinking since it is taking a little more work to maintain temp. For example, when the car temp is 73, but inside the car is really 69, you feel the cold, yet the car is saying warm enough and stops heating.

when it heats it’s fine. The issue is getting it to heat consistently.

 

[TaxmanHog]

Truck started from cold, leaving my 60 degree garage.

Plenty of stored heat in the battery, the system likely didn't think it needed any maintenance warming, it might not even try if you had a DCFC charging station posted as destination that was within 20 miles.

 

[TaxmanHog]

Testing DCFC is something I plan to do in the future.

I have not focused on battery temp too much. From what I have seen so far the truck is happy leaving the battery alone if it's over 50F. I have not done much testing on that though since my truck rarely gets cold soaked. With the mild temp here even a full work day doesn't drop the battery temp that much.

I was hoping you would, I didn't want to side track your mission with cabin comfort at the moment.

As an aside, this evening I went for an hour long cruise with the truck in tow/haul mode, no appreciable increase of motor energy it was at 94% the entire time, earlier today I got it to rise from 91% to 96% using a DCFC drive destination. I'm thinking the tow/haul trick is only good for chilling a hot battery but not warming a cold battery. Add that test to your OBD2 research agenda, I'm curious what you will see.

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