6M5Z15A022A Ambient Air Temp. You should have noticed the dash display reading a low temperature. A modern vehicle, the AAT (Ambient Air Temp) information is given to the PCM (powertrain control module); which is then seent via HS-CAN (High-Speed Controller Area Network) to the BCM (Body Control Module) which connected to the HVAC Control Module. Hence when you see a dash reading with a temperature "that doesn't make sense". Often it is that simple AAT sensor. A very thin smear of dielectric grease on the connector is a good thing to help that O ring in the connector seal against moisture/corrosion.
Thanks Tom. Great info. I used FORScan to monitor the PIDS which allowed me to somewhat deduce the modules that were using AAT. The dash reported 61 degrees riding around on a 97 degree day!
Did not correct the particular AC problem I was having, but it did fix my temp readout. Perhaps if you have the comfort AC with auto temp it may have an effect.
I have not but I’ve pretty much ruled out the minor stuff. I saw one owner of 2019 say that they found metal shavings in his unit, not sure which part. Ford transit USA group on FB . “My AC unit and system was replaced at 6k miles.. metal shavings in the unit... under warranty. Brought it in bc the AC wasn't strong ie cold...”
Very informative video specially for me as a non mechanic. I just have a question on the compressor, it is my understanding that when the aircon reached the set temperature, the compressor will be turned off. I noticed that the compressor keeps on running even if the temp is very cold. Even if I lower the temp it continues to run. Although I noticed inside the car that temp is reducing and adjusting but the compressor is still running. Is this normal for ford?
It may be normal if you have auto climate controls and auto is engaged? Otherwise it could be a sign if refrigerant leakage. In general the compressor will run until an external trigger such as evap temp, amb temp or pressure, rpms or a combo tell it to turn off.
@@MTBPlanB yes i always use auto climate controls. Those this mean that the cabin of the car should reach a certain temp so the compressor will disengage? My concern is the longevity of the compressor if it continues to operate.
@Triathlete Over 50 I don’t have auto climate controls to confirm…but in other cars, if auto is engaged, the compressor will remain running. Maybe someone else can confirm if this is how the Transit auto works. So in short, the temp of the air inside is not necessarily directly correlated to temp, pressures, humidity associated with refrigerant being pumped thru the system and exchanging heat. For example a blend door movement can affect your cabin temp greatly, but to create the cold air component, the refrigerant still needs to be pumped thru the system.
Mr. B Looks like you have a lot of electrical engineering skills as well as others. Please tell me you're not like an accountant or something. I really enjoyed the trip videos. Probably the closest that I'll get to the seeing the sites of the west.
No, this fixed the erratic temp display which was needed to troubleshoot further. The problem is intermittent and hasn't resurfaced yet. I posted this is some of the other comments below a while ago.
My 2017 transit has been doing this intermittently for a year. I am in Florida where it is not nor has it ever been below 20 degrees. BUT for some reason the gauges occasionally read 15 degrees. That is on a summer day as well. It will sit like this for a good while. But if I begin driving it will climb up into something closer to reality and blow cold air. I have also had it do the other extreme on a cold day say the temperature was 200 when it is closer to 40. So... do you think if I change this part it will make a difference? 😵
Mark Hinds It could be your problem. Do you know if the compressor clutch is engaged when it reads low? Check out this vid I just made to check the signals, etc ruclips.net/video/xglEOkRLSQM/видео.html
![BLACK BAG - Official Trailer [HD] - Only in Theaters March 14](http://i.ytimg.com/vi/Du0Xp8WX_7I/mqdefault.jpg)
I was hoping you would the resistance. I have same issue trying to figure out if its the sensor or wiring
Finally found it, Thank You!
Thank you man...
6M5Z15A022A Ambient Air Temp. You should have noticed the dash display reading a low temperature. A modern vehicle, the AAT (Ambient Air Temp) information is given to the PCM (powertrain control module); which is then seent via HS-CAN (High-Speed Controller Area Network) to the BCM (Body Control Module) which connected to the HVAC Control Module. Hence when you see a dash reading with a temperature "that doesn't make sense". Often it is that simple AAT sensor. A very thin smear of dielectric grease on the connector is a good thing to help that O ring in the connector seal against moisture/corrosion.
Thanks Tom. Great info. I used FORScan to monitor the PIDS which allowed me to somewhat deduce the modules that were using AAT. The dash reported 61 degrees riding around on a 97 degree day!
Great video. Mine is experiencing exactly the same problem. Did it correct the HVAC issues? Thanks.
Did not correct the particular AC problem I was having, but it did fix my temp readout. Perhaps if you have the comfort AC with auto temp it may have an effect.
@@MTBPlanB im having exact same problems whit my vehicle as far as the AC not fuctioning properly.. have you been able to diagnose the issue?
I have not but I’ve pretty much ruled out the minor stuff. I saw one owner of 2019 say that they found metal shavings in his unit, not sure which part. Ford transit USA group on FB . “My AC unit and system was replaced at 6k miles.. metal shavings in the unit... under warranty. Brought it in bc the AC wasn't strong ie cold...”
Very informative video specially for me as a non mechanic. I just have a question on the compressor, it is my understanding that when the aircon reached the set temperature, the compressor will be turned off. I noticed that the compressor keeps on running even if the temp is very cold. Even if I lower the temp it continues to run. Although I noticed inside the car that temp is reducing and adjusting but the compressor is still running. Is this normal for ford?
It may be normal if you have auto climate controls and auto is engaged? Otherwise it could be a sign if refrigerant leakage. In general the compressor will run until an external trigger such as evap temp, amb temp or pressure, rpms or a combo tell it to turn off.
@@MTBPlanB yes i always use auto climate controls. Those this mean that the cabin of the car should reach a certain temp so the compressor will disengage? My concern is the longevity of the compressor if it continues to operate.
@Triathlete Over 50 I don’t have auto climate controls to confirm…but in other cars, if auto is engaged, the compressor will remain running. Maybe someone else can confirm if this is how the Transit auto works. So in short, the temp of the air inside is not necessarily directly correlated to temp, pressures, humidity associated with refrigerant being pumped thru the system and exchanging heat. For example a blend door movement can affect your cabin temp greatly, but to create the cold air component, the refrigerant still needs to be pumped thru the system.
Did it work?
informative but needs to pan out so the vdo will show what you are referring to
Mr. B Looks like you have a lot of electrical engineering skills as well as others. Please tell me you're not like an accountant or something. I really enjoyed the trip videos. Probably the closest that I'll get to the seeing the sites of the west.
No sir, I’m bad at accounting for anything!
and you suck with everything digital
Well did that fix the AC problem or not. Why the cliffhanger?
No, this fixed the erratic temp display which was needed to troubleshoot further. The problem is intermittent and hasn't resurfaced yet. I posted this is some of the other comments below a while ago.
My 2017 transit has been doing this intermittently for a year. I am in Florida where it is not nor has it ever been below 20 degrees. BUT for some reason the gauges occasionally read 15 degrees. That is on a summer day as well. It will sit like this for a good while. But if I begin driving it will climb up into something closer to reality and blow cold air. I have also had it do the other extreme on a cold day say the temperature was 200 when it is closer to 40. So... do you think if I change this part it will make a difference? 😵
Mark Hinds It could be your problem. Do you know if the compressor clutch is engaged when it reads low? Check out this vid I just made to check the signals, etc ruclips.net/video/xglEOkRLSQM/видео.html
So did the sensor replacement take care of the ac issue?
Yes it resolved half of the issue. The other half was the evaporator was freezing over.
After I replaced the sensor still no reading and there’s ice possible message in dic
Sir where is the temprechr sencer 2017 ford focus .
It’s located in he passenger mirror assembly . Search around RUclips on how to remove the mirror.
Does anybody know where the aat sensor is on a 2016 f150?
Try looking outside the radiator by the hood latch?
Background noise is unbearable
Robert Swaney Can’t control landscapers.
Sounds like a truck stop.
too much talking not enough doing.
I was a newb.