Jump to content

TPMS Autolearn Not Learning

MrLeadFoot
 Share

Recommended Posts

MrLeadFoot Enthusiast

MrLeadFoot

Posted
Posted

Yesterday, I cross-rotated my FL with my RR. About an hour later I went grocery shopping, without noticing anything unsual, I think because I typically run the same tire pressure all around, as per my door jamb placard. Today, I decided to see what it might ride like with higher pressure in the front than the back, so I set my fronts to 37 and my rears to 34. Surprisingly, my DIC now reads:

 

LF34  RF37

 

LR34  RR37

 

It appears that my TPMS system must not have autolearned yesterday's FL <==> RR wheel position swap. Now, the manual says:

 

TPMS Sensor Matching Process — Auto Learn Function
Each TPMS sensor has a unique identification code. The identification code needs to be matched to a new tire/wheel position after rotating the tires or replacing one or more of the TPMS sensors. When a tire is installed, the vehicle must be stationary for about 20 minutes before the system recalculates. The following relearn process takes up to 10 minutes, driving at a minimum speed of 20 km/h (12 mph). A dash (-) or pressure value will display in the DIC. See Driver Information Center (DIC) (Base Level) page 130 or Driver Information Center (DIC) (Uplevel) page 131. A warning message displays in the DIC if a problem occurs during the relearn process.

 

My truck sat for 20 minutes yesterday between the time I swapped wheel positions and the time I went grocerty shopping. It also later sat overnight. Not only did I drive 18 miles to the grocery store and back yesterday, I also just took it for a 26 mile round trip drive, which included two 9 mile freeway runs. I can't promise that the drive included 10 minutes of continuous 20mph+ speed, but the owners manual says "up to 10 minutes". I also never saw a (-) pressure value, as stated in the above owners manual excerpt. I doubt it needs the full 10 minutes, but if it really doesm, it could take weeks for an autolearn to occur because my daily drive to work is 13 miles, with 9 miles on the freeway, so I don't see 10 minutes of continuous driving over 20mph.

 

Does anyone know how I might "force" a relearn?

MrLeadFoot Enthusiast

MrLeadFoot

Posted
  • Author
Posted (edited)

Just thought of something. The manual doesn't say one way or another, but does the vehicle have to be turned on while it is sitting during the 20 minute wait? Because it's not been left on while sitting for 20 minutes since the wheel position swap.

Edited by MrLeadFoot
MrLeadFoot Enthusiast

MrLeadFoot

Posted
  • Author
Posted (edited)

Are you saying put it in relearn mode then drive it, while it's in relearn mode? Or, are you saying to do the manual relearn with the relearn tool? 

Edited by MrLeadFoot
MrLeadFoot Enthusiast

MrLeadFoot

Posted
  • Author
Posted

On the way to work this morning, I started the truck, warmed it up, then right before I started driving, put it in relearn mode. At first both passenger side tires read higher than the driver's side (when both fronts are actually higher than the rears). After about 10 miles, it looked like both fronts became higher. I can't be sure, but that may have done the trick. When I get home, I will let air out of one of them and see if it now reports the lower pressure on the correct tire.

onewheat Enthusiast

onewheat

Posted
Posted

How do you put it in 'relearn mode'?  I assume it;s in the manual, but I haven't made it that far in the 453 pages yet, I guess.

 

MrLeadFoot Enthusiast

MrLeadFoot

Posted
  • Author
Posted (edited)

It is NOT in the manual! I know, dumb, right? Scroll through the info on the DIC until you see tire pressure. Press in on the the scroll wheel, which also happens to be a button. Hold it down until you hear the horn beep twice. The screen should now say something like "Tire Relearn Activated". The exterior left front turn signal then becomes illuminated to let you know which tire to start with if you're going to proceed with the manual relearn process. In my case, and apparently silvetadosid's friend's case, I did not have to go any further, as after driving it for a bit, it autolearned. Apparently, the feature is not without bugs, and is not reliable, so I ordered the little relearn tool for $8 on Amazon to use next time. 

Edited by MrLeadFoot
  • Thanks 1
redwngr Senior Enthusiast

redwngr

Posted
Posted
On 4/3/2023 at 7:04 AM, silveradosid said:

did you put the system in relearn mode, a friend of mine has to put his 22 in relearn mode or it doesnt relearn

Is friends truck a 22.5 ( refreshed ) truck?

 

 

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Latest Articles

  • Posts

    • Chuck FB
      Gas Prices

      By Chuck FB · Posted

      I was checking out fuel prices at my farm fuel retailer at their pumps and yes the farm price is a bit lower than the non dyed fuel and was glad to see that the regular farm gas price has dropped a lot from what it had been but what blew me away was the price of diesel as the spread now compared to before the prices went up earlier in the year, diesel was actually slightly lower than gas which was a switch from the theme the last number of years. However that sure isn't the theme lately and definitely not right now. The prices I will post are not from that retailer but just looking at gasbuddy for the main city in this area and instead of posting the lowest price someone found I will list the higher price ( and that may not be the highest price, just whatever someone posted on gasbuddy ).   So regular gas and there are a lot of stations listing the same price for regular is 1.68 a liter, premium 2.00 a liter. Diesel 2.03 a liter for a top price I saw on diesel.   Figures out to 6.36 a us gallon Canadian funds for regular and 7.68 for diesel. With the US exchange rate it would be 4.58 us for regular and 5.53 for diesel.    Thought I would figure that out to get a picture of what it settles out like compared to various US prices and its about the same as the current price in Fairbanks AK as Anchorage tends to be lower. So yes, these would be the prices and higher along the way on the Alaska highway where they know they have a captured market !, for fuel prices for those beginning the long drive back to the lower 48   The problem is our Canadian dollar and going to the states that have the high prices, boy do we pay then !
    • wxman13
      OTA updates and radio still cuts out

      By wxman13 · Posted

      Just wanted to get a idea of how many of you still have problems with your radio cutting out during the first few minutes of driving, my 2024 GMC Sierra still does this after a little over 2 years of complaining to my dealer about it, and OTA updates no longer complete, the check for updates in settings is greyed out for the second time while trying to install a update, my dealer took about a week to play around with it the first time this happened, and somehow got the check for updates to work, even though it would always show system is up to date when I knew it wasn't, now again 1 month later its greyed out again when the OTA update N25-F163BU tried to install, which ironically is the update to help with reliability of future updates.
    • wxman13
      OTA updates and radio still cuts out

      By wxman13 · Posted

      Just wanted to get a idea of how many of you still have problems with your radio cutting out during the first few minutes of driving, my 2024 GMC Sierra still does this after a little over 2 years of complaining to my dealer about it, and OTA updates no longer complete, the check for updates in settings is greyed out for the second time while trying to install a update, my dealer took about a week to play around with it the first time this happened, and somehow got the check for updates to work, even though it would always show system is up to date when I knew it wasn't, now again 1 month later its greyed out again when the OTA update N25-F163BU tried to install, which ironically is the update to help with reliability of future updates.
    • richard wysong
      Gas Prices

      By richard wysong · Posted

      Prices on the hi-way are falling daily, $3.66- $3.71, Local has yet to drop, actually some are still going up, $3.87 and up
    • whenindoubtuseahammer
      My First Project and GMC has me stumped

      By whenindoubtuseahammer · Posted

      I finally got it to start. It was a mix of a few issues. The frame ground was in bad shape so I ran a new one and cleaned up the area to get a good connection then covered it in rust reformer then bed liner to keep it as clean as possible. The other ground I found that looked suspect was on the frame toward the back of the truck near the bed. I did the same. After pulling the fuse box out from the engine bay I found a couple of wires that looked like at some point mice may have got ahold of it. That was an easy fix. After that i was able to get control power and was able to trace down a few more connections going to the other fuse panels in the cab. After that it finally started up and runs. It sounds like an angry school bus which I can work with. No OBD2 codes, but I think since its set for a long time I should pull the turbo and get it rebuilt or swapped out, but for now im good to go. Thanks for all the advice. It got me on the right track. 

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...