I am thinking of buying wheel/tire setup for TireRack. Does anyone know what we need to do to be able to keep TPMS working on winter tires? Obviously I do not want to move my TPMS sensors from 1 wheel set to the other.
TPMS programming?
pcampbell
21 - 40 of 140 Posts
its how it is in some cars ... but they don't have independent readers in or near the wheel wells
you can also activate programming in(like GM) from the car or key-fob and finish programming by triggering sensors in a particular order...
i also some cars auto program to new sensors as its only sensor they see in proximity for XX time
Ha. I didn't know this. On my search I can not find anywhere it says Subaru Ascent has TPMS in Canada while a lot of articles say Subarus didn't have this in the past. I will ask my dealer.
Thanks for pointing out.
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15,777 Posts
It's all about the TREAD Act...
There's a lot more to the TREAD Act (the name isn't really about tires) for those who are bored and like reading up on such things.
Here's the text of it for those really bored:
https://www.govtrack.us/congress/bills/106/hr5164/text
Wikipedia detailed summary:
https://en.wikipedia.org/wiki/Trans...rg/wiki/Transportation_Recall_Enhancement,_Accountability_and_Documentation_Act
Here's a good short summary:
https://www.nhtsa.gov/sites/nhtsa.dot.gov/files/weinstein.pdf
Bonus doc:
https://one.nhtsa.gov/nhtsa/announce/testimony/tread.html
SHORT VERSION:
TPMS is mandated in the United States, but not Canada. Vehicles made for sale in Canada may or may not have TPMS depending on whether or not the manufacturer decided to do a slightly different spec vehicle for Canada.
My understanding is that theoretically, if you get an Ascent that was slated for the US market, but delivered to Canada, it would have the TPMS, unless they took the time to swap wheels. If you got an Ascent that was slated for the Canadian market but got it in the US, then they definitely swapped to wheels with TPMS as required by law when the vehicle is re-assigned as a US vehicle.
TPMS are mandated in the United States, thanks to Ford, and sadly to the people who got hurt or died. The TREAD Act was enacted by Congress in 2000, effective for 2008 and newer model years, after rollover incidents involving the Ford Explorer and Firestone tires.
There's a lot more to the TREAD Act (the name isn't really about tires) for those who are bored and like reading up on such things.
Here's the text of it for those really bored:
https://www.govtrack.us/congress/bills/106/hr5164/text
Wikipedia detailed summary:
https://en.wikipedia.org/wiki/Trans...rg/wiki/Transportation_Recall_Enhancement,_Accountability_and_Documentation_Act
Here's a good short summary:
https://www.nhtsa.gov/sites/nhtsa.dot.gov/files/weinstein.pdf
Bonus doc:
https://one.nhtsa.gov/nhtsa/announce/testimony/tread.html
SHORT VERSION:
TPMS is mandated in the United States, but not Canada. Vehicles made for sale in Canada may or may not have TPMS depending on whether or not the manufacturer decided to do a slightly different spec vehicle for Canada.
My understanding is that theoretically, if you get an Ascent that was slated for the US market, but delivered to Canada, it would have the TPMS, unless they took the time to swap wheels. If you got an Ascent that was slated for the Canadian market but got it in the US, then they definitely swapped to wheels with TPMS as required by law when the vehicle is re-assigned as a US vehicle.
Thanks for your insight. Yes, that make sense and that's what my assumption too. So I popped a question to dealer and waiting for the answer. My delivery is on next Wednesday. But I am waiting on this to decide to buy either 20" winter tires alone or 18" tires and rims.
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54 Posts
Anyone have experience with these TPMS? $39.98 each seems reasonable seeing how the dealer wants $80-110 each.
https://www.tpms.com/Schrader_33500_EZ_Sensor_Subaru_TPMS_sensor_p/ezs28103fl00a.htm
https://www.tpms.com/Schrader_33500_EZ_Sensor_Subaru_TPMS_sensor_p/ezs28103fl00a.htm
I had no idea that Canadian Subaru's didn't have TPMS until I took my Ascent home and started playing with it. I thought that was a total given these days. I am really not pleased with this omission, but it seems that there is nothing that can be done about it at this point. It has come in handy several times in the past 8 years with my Acadia on the kinds of roads that I drive.
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86 Posts
I'm surprised as well. It seemed standard on much cheaper vehicles so I just assumed
The only reason I can see leaving it out is that winter tires are mandatory in a lot of places and most people don't spend the money to add sensors to their winter rims so almost everyone spends 4-6 months out of the year with the warning light on
I'm so used to ignoring it I'm not sure it would even catch my attention unless it came on while I was driving
The only reason I can see leaving it out is that winter tires are mandatory in a lot of places and most people don't spend the money to add sensors to their winter rims so almost everyone spends 4-6 months out of the year with the warning light on
I'm so used to ignoring it I'm not sure it would even catch my attention unless it came on while I was driving
I am bit surprised, but don't think it is big issue. Even when I had it, I didn't trust the Honda TPMS that much. It never warn me of anything in last 8 years. But I do fill nitrogen every couple of months and with Costco nitrogen inflation facility it is pretty easy. Just set the required tire pressure ( or ask any service guy in the Tire center) and inflate the tire. When the tire pressure reaches the value set, it beeps. No need to for check the pressure with an external tool.
I also ordered a set of 20" Blizzack V2 that I am going get installed by Costco. Since there are no TPMS I could have gone 18", but for now considering the cost of rims, I going to keep 20" until the life of these tires.
So I picked up Red limited yesterday. I posted the pics here.
https://www.ascentforums.com/forum/13-subaru-ascent-pictures/4457-my-red-rider.html#post62669
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15,777 Posts
Can't love this post enough! That's a lot cheaper, even with buying the 8 sensor kit that comes with the programming tool!
more info from the maxitpms site
no Ascent listed yet but 2018 Impreza and Crosstrek listed on all points and if i see it correctly Ascent TPMS is same
OBD-II Function
Programming Status
Supported by Autel(MX-Sensor)
Supported by Autel(Tool) (OBD-II)
P.S..If the "Relearn Type" of MX-Sensor is only OBD type, and the "OBD-II Function" has not been released for the moment, you can just do the clone for relearning the MX-Sensor.
no Ascent listed yet but 2018 Impreza and Crosstrek listed on all points and if i see it correctly Ascent TPMS is same
OBD-II Function
Programming Status
Supported by Autel(MX-Sensor)
Supported by Autel(Tool) (OBD-II)
P.S..If the "Relearn Type" of MX-Sensor is only OBD type, and the "OBD-II Function" has not been released for the moment, you can just do the clone for relearning the MX-Sensor.
Joined
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15,777 Posts
There's something odd/different with the programming though. The Subie performance shop I went to tried those profiles, and they didn't work. Please keep me posted.
how long ago was it ? tool FW need to be updated
2018 Impreza and XV Crosstrek was listed under 315, on last update they added 433 profile
also is the key word "added" as it still 2018 XV Crosstrek listed 315 but 2018 Crosstrek listed 433
TPMS readings are not adjustable... how do you know its 35 and not 31 ? its odd to have all 4 to be off exactly the same
BTW Subaru only update as you drive
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15,777 Posts
There's the kicker... figuring out when the right update is available for the reprogrammers. It was late July. Hoping they have updated it so that others don't have to spend the $425 I did.
I think one shows 30 and the other 3 31. Manual tire gauge says all 4 around 35-36. I would of thought I would get a low air condition since the recommended pressure is 35
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15,777 Posts
Should match almost exactly with a gauge.
Did you try another gauge? I use a bunch of cheap Slime gauges. All but one read the same thing. I also use two digital gauges (one built into a massive inverter/pump/jump start unit). They agree to within a fraction of a pound of the TPMS (rounding - they don't round, the car does). That was with the stock 20's, and with my current 17" tires.
If you've verified the inconsistency with other gauges, I'd take it in to be checked out.
I own about two and a half gazillion of these (10 or 12 or maybe even 20... seriously):
https://smile.amazon.com/gp/product/B003V9W1ZE/
And half a gazillion of these (four):
https://smile.amazon.com/gp/product/B0002SQYTG/
And one of these:
https://smile.amazon.com/gp/product/B07528LFCT/
And this:
https://smile.amazon.com/gp/product/B06XDH6XL3/
And two analog dial ones, and till recently, one older Dewalt multi with an analog dial...
...one of the Slime mini ones was off (out of literally about 20 of them, no joke on the quantity).
Anyways, point is, I am crossing my fingers that it's just a defective tire pressure gauge. And, at $3-6, it's pretty easy to check before you turn in your car for a day. :tango_face_wink:
Keep us posted... ESPECIALLY if it's an error in the system, so, others can learn what needs to be done.
WORST CASE:
If it's not dealer adjustable, hopefully, it's consistent.
One thing I've noted is that the tires increase pressure by nearly 4psi (+/-) from driving even short distance due to warming up. Presuming you've checked both readings at the same time, so...
Did you try another gauge? I use a bunch of cheap Slime gauges. All but one read the same thing. I also use two digital gauges (one built into a massive inverter/pump/jump start unit). They agree to within a fraction of a pound of the TPMS (rounding - they don't round, the car does). That was with the stock 20's, and with my current 17" tires.
If you've verified the inconsistency with other gauges, I'd take it in to be checked out.
I own about two and a half gazillion of these (10 or 12 or maybe even 20... seriously):
https://smile.amazon.com/gp/product/B003V9W1ZE/
And half a gazillion of these (four):
https://smile.amazon.com/gp/product/B0002SQYTG/
And one of these:
https://smile.amazon.com/gp/product/B07528LFCT/
And this:
https://smile.amazon.com/gp/product/B06XDH6XL3/
And two analog dial ones, and till recently, one older Dewalt multi with an analog dial...
...one of the Slime mini ones was off (out of literally about 20 of them, no joke on the quantity).
Anyways, point is, I am crossing my fingers that it's just a defective tire pressure gauge. And, at $3-6, it's pretty easy to check before you turn in your car for a day. :tango_face_wink:
Keep us posted... ESPECIALLY if it's an error in the system, so, others can learn what needs to be done.
WORST CASE:
If it's not dealer adjustable, hopefully, it's consistent.
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