Resetting TPMs - single chirp at start, expecting double chirp

[xlrlist01]

Hello all

I was planning on re-programming the (new) TPMs on my 2004 X but have gotten stuck.

I go into Accessory mode fine and press both buttons on the remote. After 3-4 seconds a get a single chirp, I'm expecting a double chirp. So far I haven't managed to get a new sensor recognized either.

The system was working fine with the old TPMs, displaying the correct pressures.

Any advice?

TIA

 

[cubby558]

What tpms tool are you using. Once you get the chirp, you start at the left front tire to set that tpms. You will get a chirp from the horn when it recognizes it, then move to the right front tire. After you get the chirp for that one move to the right rear and then to the left rear. After it recognizes the right rear, you will get two chirps and programming is done.

Hello all

I was planning on re-programming the (new) TPMs on my 2004 X but have gotten stuck.

I go into Accessory mode fine and press both buttons on the remote. After 3-4 seconds a get a single chirp, I'm expecting a double chirp. So far I haven't managed to get a new sensor recognized either.

The system was working fine with the old TPMs, displaying the correct pressures.

Any advice?

TIA

 

[IAN]

TPMS tool

xlrlist01

Here is the tool that cubby is referring and it is available at wallmart for less then $10.( no battery )

IAN

 

[nerkpowers]

I have also reprogrammed mine using a 3” donut magnet. It has to be large enough to fit around the stem and strong enough for the TPMs to see the magnetic field. This solution was posted on this site several years ago.

Sent from my iPad using Tapatalk

 

[xlrlist01]

Thank you all for your replies

According to the workshop manual and this thread here: Tire pressure re-set tool, the horn should chirp twice (not once) at the start of the reset.

What my memory says is that it starts with a single chirp, and that the double chirp is a mistake in the manual.

I'm trying to diagnose why the new sensors are not being recognized and the difference between the workshop manual and my memory (and your reply I suspect) eliminates the first problem, however I would like confirmation that it is the manual that is wrong.

To answer your second question, I'm using a magnet, same as I have always done. However, even with the magnet clinging to the sensor it isn't being recognized. Getting the 'official' tool is something I forgot to do when I bought the replacement sensors. However, if there is supposed to be a double-chirp at the start then I need to fix that problem first.

******************
As a reminder here is the reset procedure, as per the workshop manual, I have put what I think is the wrong text in bold:
Select the ACC position on the ignition switch.
Simultaneously press the keyless entry transmitter lock and unlock buttons until a double horn chirp sounds, indicating the TPM learn mode has been enabled.
NOTE
Important
If a horn chirp does not sound after 15 seconds using either tool, repeat step 1.
Starting with the left front tire, hold the antenna of the TPM tool against the tire sidewall close to the wheel rim at the valve stem location then press and release the Activate button and wait until a horn chirp sounds.
After the horn chirp sounds, proceed as in step 3 for the next 3 sensors in the following order:

Right front
Right rear
Left rear

After the left rear sensor is learned, a double horn chirp will sound indicating all sensor IDs have been learned.
Select the OFF position on the ignition switch to exit the TPM learn mode.

 

[xlrlist01]

I'm back where I started, with the same question anyone?:

Does the reset the TPMs process start with a single chirp or a double chirp? I get a single chirp, the workshop manual states I should get a double-chirp.

Using the EL-50448 reset tool (thanks Ian) has not worked, I don't get the horn chirp as I go round each wheel. My suspicion is that I have been sold four Delco 25758220 sensors with dead batteries. (GM use the same 25758220 part number.) Or, of course, they could be the wrong sensors. They were sold as correct for my 2004 XLR.

 

[IAN]

IPM problem

xlrist01

The TPM part number 25758220 is printed at the lower section of it, some time the old new stock have a poor or a dead battery.

The owner manual recommended to have your XLR repaired at the dealer.

The repair manual says…. it will chirp ounce to indicate that the system proceed its verification, and then you have to expected 2 chirps to confirm that the system reconnised the TPM #1 and so on for each other wheels as per the indications.

If it fails check the tool, or the car battery for a full charge level and re do it, if it fail again you will have to question yourself like you are doing presently for the proper TPM as its battery do not last for ever.

The after market tool EL-50448 is dedicated to the GM product and it says like the repair manual says, that is my understand of it.

IAN

 

[xlrlist01]

xlrist01

The TPM part number 25758220 is printed at the lower section of it, some time the old new stock have a poor or a dead battery.

The owner manual recommended to have your XLR repaired at the dealer.

The repair manual says…. it will chirp ounce to indicate that the system proceed its verification, and then you have to expected 2 chirps to confirm that the system reconnised the TPM #1 and so on for each other wheels as per the indications.

If it fails check the tool, or the car battery for a full charge level and re do it, if it fail again you will have to question yourself like you are doing presently for the proper TPM as its battery do not last for ever.

The after market tool EL-50448 is dedicated to the GM product and it says like the repair manual says, that is my understand of it.

IAN

Thank you for that Ian.

I remember that I will get one chirp per wheel (two at the last wheel), it is that first chirp before the first wheel that is unclear. So, the manual you have states one chirp at the start. If anyone wants to go and prove this in their X, it is a simple test. Provided you don't put a TPM activation tool near one of the wheels, the existing four are remembered, the existing set are only erased after the first wheel is recognized (re-programed).

I have been talking to the TPM specialist at the tire place. His advice is that you have to set the tire pressure to 50 psi to activate the sensor. I have never heard of this and a Google search does not have any hits. However, if their equipment can't find a signal, then I have nothing to lose.
The original (2004) TPMs are still working (if slowly), 17 years old. Setting the pressure to 50 psi does make some sense, if there is a 'fuse' that closes and enables the battery, that would prevent discharge before it is put into service, extending shelf life.
I read that the original TPMs have a 40 psi limit that should never be exceeded, a tire fitter did exceed that pressure once and one of the TPMs was stuck at some high pressure for the first half mile. Then a bump in the road and it has worked correctly ever since.

I have booked my X into the tire dealers next week.

 

[IAN]

TPMS

xlrlist01.

The owner manual indicate that the TPM are good for 10 years, after 17 years, yours could the problem.

Regarding the TPM tool, at the dealer repair shop it is done with a tech2 and for the after market tool it could indicated a different way.

Having one or tow beeps, my opinion is, as long that you get a confirmation that the TPM has been reconnised, is the main thing.

Hope, that you will not reinstalled the old ones.

Good luck

IAN

 

[hawkeye372]

The other day my dash said RF tire pressure to high. Then I pressed the display for the tires. It said 33 then a few min later went down to 32 then back up to 33. The other day I started the car (cold start) and it said 31 then went up to 33.
But when I went to the tire place and had them rotated. The guy could find out how to reset the tpm. So I took my car back to my dealership. And they reset it.


Sent from my iPhone using Tapatalk

 

[xlrlist01]

xlrlist01.

The owner manual indicate that the TPM are good for 10 years, after 17 years, yours could the problem.

Regarding the TPM tool, at the dealer repair shop it is done with a tech2 and for the after market tool it could indicated a different way.

Having one or tow beeps, my opinion is, as long that you get a confirmation that the TPM has been reconnised, is the main thing.

Hope, that you will not reinstalled the old ones.

Good luck

IAN

Thank you Ian.
As I put in my first post, I am fitting NEW TPM sensors. That is why they need to be re-programed.
My point about the old sensors is that even at 17 years old, the old (original) ones are still working, if slowly. Thus I take the view that new sensors supplied by GM are unlikely to have flat batteries, they are not going to be that old, they will not have been in stock on a shelf for 17 years.
Also, I can't find any mention in the full Cadillac workshop manual that TPMs are programed with a Tech2.

 

[xlrlist01]

Solved.

I followed this method to re-program the new TPM sensors.

I sourced the tool recommend here (post #3, thank you Ian)
I purchased four new sensors from GM: part number 25758220 (AC Delco use the same number).

I had the new sensors fitted, tire pressures set to 30 psi.

Next, roof down I drove about 10 miles at speeds of mostly 50-55mph.
I stopped my XLR and switched off.
I went into accessory mode (hold the bottom half of the start button for about two seconds), key fob in my pocket.
I opened the driver's door, stepped out and closed the door.
I ignored the warning chimes (the no fob ones).
Holding the fob and standing by the door next to the tonneau cover I pressed and held unlock and lock until I had a SINGLE chirp from the horn (about 4 seconds). I pressed unlock fractionally first, to stop the door locking. (The workshop manual is wrong at this point in stating that a double chirp is expected)
I left the key fob on the tonneau cover
I went to the front left wheel, located the valve stem and put the black pointy bit of the EL-50448 against the side wall, pointing at where the sensor is inside the tire. I pressed and held the button for about 4 seconds, until I got a single chirp from the horn. (4 seconds seems a very long time!)
I visited two of the the remaining wheels, Right Front, Right Rear and did the same, getting a single chirp from each.
On the fourth wheel (Left Rear) same 4 second button press on the EL-50448 and this time I got the expected double-chirp to confirm that all four sensors had now been successfully programed.

I climbed back into my XLR, switched off accessory mode and started normally. Scrolled through the Driver Info Center and success, the correct tire pressures were all being displayed.

Job done.

At no point has the tire pressure exceeded 40 psi, the tires seated at 38 psi. That suggestion regarding needing 50 psi (my post #8) is not applicable and might damage the TPMs, 40 psi is the recommended max (somewhere, I forget where).

Thank you all for your help.

Two extras:
The sequence matters, Left Front, Right Front, Right Rear, Left Rear is correct.
25758220 TPMs are supplied without the sleeve and nut that holds them on to the wheel, so you will need four of those too, if you are not using the ones from your old wheels.

 

[IAN]

TPM system

xlrlist01

Find enclosed a photo that shows the TPMs tools J-46079 that the GM dealers are using.

As you can appreciate the tool is quite different then the after market tool, as there is 3 buttons availables with a screen for communicating with the BCM or the scanner.(wire line ?)

What is writing in the GM repair manual is OK as the tools is different and also used differently.... however its applications should be the sames and the results also.

Ian