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Can we reset TPMS system?


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53 replies to this topic

#21 OFFLINE   rbort

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Posted 03 January 2015 - 01:57 PM

Hazard light thing.

 

Power up the car without the brake (will not get the green GO car).

Push the hazard button 6 times.  Once it turns it on, once it turns it off, so like 3 on/off cycles.

 

The car will beep and say "Train left tire"

You drain the air until the car beeps and then move on to the next tire.

Fill all tires first to where you want them to be, then start the procedure.

After all 4 tires the car beeps twice.

Then you fill the tires back up to the original pressure.

 

You need to train them every time you chance the running pressure.  In other words if you increase the pressure for better mpg numbers, retrain all the tires to the new setting.

 

-=>Raja.









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#22 OFFLINE   drdiesel1

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Posted 03 January 2015 - 04:55 PM

Hazard light thing.

 

Power up the car without the brake (will not get the green GO car).

Push the hazard button 6 times.  Once it turns it on, once it turns it off, so like 3 on/off cycles.

 

The car will beep and say "Train left tire"

You drain the air until the car beeps and then move on to the next tire.

Fill all tires first to where you want them to be, then start the procedure.

After all 4 tires the car beeps twice.

Then you fill the tires back up to the original pressure.

 

You need to train them every time you chance the running pressure.  In other words if you increase the pressure for better mpg numbers, retrain all the tires to the new setting.

 

-=>Raja.

 

I don't know where you found this GEM of misinformation, but it's total BS..........No, you don't need to retrain the tires to adjust air pressure.

It's a preset threshold and it's not affected by adjusting tire pressures :drop:



#23 OFFLINE   rbort

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Posted 03 January 2015 - 05:07 PM

Well, here is the logic.  If the tires are factory set to 38psi and the low tire pressure triggers at 28psi, if you raise the pressure in your tires to 51psi then you would want to retrain the car so that it will let you know when the PSI of the tires drops to around 41 or so.  If you don't retrain them then it won't trigger until you go down to 28 psi.  Still OK but I'd rather know sooner.

 

-=>Raja.



#24 OFFLINE   drdiesel1

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Posted 03 January 2015 - 05:32 PM

Well, here is the logic.  If the tires are factory set to 38psi and the low tire pressure triggers at 28psi, if you raise the pressure in your tires to 51psi then you would want to retrain the car so that it will let you know when the PSI of the tires drops to around 41 or so.  If you don't retrain them then it won't trigger until you go down to 28 psi.  Still OK but I'd rather know sooner.

 

-=>Raja.

Too bad logic has nothing to do with the systems PRESET threshold of 24 psi to trigger the TPMS light.

 

Do you have any info/proof to substantiate your theory ? I've never heard of this and it makes no sense that

location training will change the preset trigger threshold.


Edited by drdiesel1, 03 January 2015 - 05:34 PM.


#25 OFFLINE   rbort

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Posted 03 January 2015 - 05:37 PM

Let me go test it for you and I'll let you know for sure - I already retrained it so let's see if it triggers higher than 24psi.

 

If logic says it always triggers at 24psi, then why the training?

 

-=>Raja.



#26 OFFLINE   drdiesel1

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Posted 03 January 2015 - 05:46 PM

Let me go test it for you and I'll let you know for sure - I already retrained it so let's see if it triggers higher than 24psi.

 

If logic says it always triggers at 24psi, then why the training?

 

-=>Raja.

This has been my question all along. The system itself will know where the tire is, but the output signal

has no data available to tell the driver tire location. I can look at the systems data in the TPMS control

module and know what each tire has for pressure, temperature and sensor ID, but the cars system only

triggers the warning lamp. I've heard it's a preset of 24PSI, but never tested it. I had plans to see if it

was possible to adjust the threshold preset with the IDS, but haven't had the time to check into it.

 

The retraining will only change location and nothing else. It's a great theory, but not a plausible one :wink:


Edited by drdiesel1, 03 January 2015 - 05:47 PM.


#27 OFFLINE   rbort

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Posted 03 January 2015 - 06:31 PM

OK, did some inflate/deflate trials in the garage.  First of all, you're right, I was wrong but here is what I found out.

 

First I checked all tires, they were down to 43 psi due to the cold.  Good exercise to do I found this so at the end of the testing I inflated them back up to 51 psi which I had done in the summer.  Note to self, drain them back down as the weather warms up.

 

So I drained the left front tire until the car dinged low tire pressure.  That trigger point is actually 26psi on my car.  I inflated the tire back up to about 52 psi and then did the training to see what I saw before.  The car beeped the horn when I reached 48psi.  This is what threw me off in the past, it triggered when the psi dropped by about 4 lbs I thought that's the new set point.

 

To verify this, I filled the tire back up to 51 psi and drained the tire again down slowly until it triggered LOW tire pressure in the car (car was ON in ready mode), and it was again 26psi.

 

So the training triggers or learns at about a 4psi drop from the setting, but the LOW tire pressure is fixed at 26psi.

 

I can't always be right, you learn something new every day, but that's a good thing.  By the way, no need for the car to tell you which tire is low, by the time you reach 26psi, the tire visually looks low and is easy to spot.   :smile2:

 

-=>Raja.


Edited by rbort, 03 January 2015 - 06:33 PM.


#28 OFFLINE   drdiesel1

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Posted 03 January 2015 - 08:34 PM

OK, did some inflate/deflate trials in the garage.  First of all, you're right, I was wrong but here is what I found out.

 

First I checked all tires, they were down to 43 psi due to the cold.  Good exercise to do I found this so at the end of the testing I inflated them back up to 51 psi which I had done in the summer.  Note to self, drain them back down as the weather warms up.

 

So I drained the left front tire until the car dinged low tire pressure.  That trigger point is actually 26psi on my car.  I inflated the tire back up to about 52 psi and then did the training to see what I saw before.  The car beeped the horn when I reached 48psi.  This is what threw me off in the past, it triggered when the psi dropped by about 4 lbs I thought that's the new set point.

 

To verify this, I filled the tire back up to 51 psi and drained the tire again down slowly until it triggered LOW tire pressure in the car (car was ON in ready mode), and it was again 26psi.

 

So the training triggers or learns at about a 4psi drop from the setting, but the LOW tire pressure is fixed at 26psi.

 

I can't always be right, you learn something new every day, but that's a good thing.  By the way, no need for the car to tell you which tire is low, by the time you reach 26psi, the tire visually looks low and is easy to spot.   :smile2:

 

-=>Raja.

I like to check my tire pressure data by looking at the EVIC in my truck. It's quick and easy and I know if I need to add pressure without going to each tire and dragging out the compressor every month. It simplifies the process and allows me to keep better track of a critical setting. This is why you had low tires for the last few months. If you're system isn't giving you the pressure data on the dash, you'll need to check them manually every month winter and summer to keep them properly inflated.

 

Attached File  EVIC.jpg   39.13KB   1 downloads



#29 OFFLINE   rbort

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Posted 03 January 2015 - 08:57 PM

I agree it would be nice to see.   The Cmax has many omitted features from it compared to the Fusion.  They could have put in more info/stuff in the screens.  Even simple stuff like roll up all the windows with the remote.

 

-=>Raja.


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#30 OFFLINE   drdiesel1

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Posted 03 January 2015 - 09:26 PM

I agree it would be nice to see.   The Cmax has many omitted features from it compared to the Fusion.  They could have put in more info/stuff in the screens.  Even simple stuff like roll up all the windows with the remote.

 

-=>Raja.

Yep! The system has the data. It's just not in the DIC :banghead:



#31 OFFLINE   Jonathan Ezor

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Posted 29 March 2016 - 08:17 AM

On a different point, it seems that my rear right TPMS sensor is no longer registering properly since my tires were swapped back to all-weathers a few weeks ago. Before I bring it back to the shop, is there a way of resetting the TPMS sensor (or is the above method the way) to get the right rear one to actually show the correct pressure? Thanks. {J}



#32 OFFLINE   RubyMax

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Posted 29 March 2016 - 11:48 AM

On a different point, it seems that my rear right TPMS sensor is no longer registering properly since my tires were swapped back to all-weathers a few weeks ago. Before I bring it back to the shop, is there a way of resetting the TPMS sensor (or is the above method the way) to get the right rear one to actually show the correct pressure? Thanks. {J}

From earlier in this thread.  Did you try this?

 

http://fordcmaxenerg...system/?p=26099



#33 OFFLINE   Jonathan Ezor

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Posted 29 March 2016 - 01:45 PM

From earlier in this thread.  Did you try this?

 

http://fordcmaxenerg...system/?p=26099

 

I meant without the tool. Thanks, though!



#34 OFFLINE   drdiesel1

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Posted 31 March 2016 - 01:35 AM

On a different point, it seems that my rear right TPMS sensor is no longer registering properly since my tires were swapped back to all-weathers a few weeks ago. Before I bring it back to the shop, is there a way of resetting the TPMS sensor (or is the above method the way) to get the right rear one to actually show the correct pressure? Thanks. {J}

They may have damaged the sensor. You will need a capable scan tool to look at the TPMS data.


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#35 OFFLINE   Jonathan Ezor

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Posted 31 March 2016 - 05:41 AM

They may have damaged the sensor. You will need a capable scan tool to look at the TPMS data.

Thanks. I've ordered a standard reset tool from eBay. Will try it, see if whatever issue is there is resolved and, if not, go back to my local mechanic. {Jonathan}


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#36 OFFLINE   stevedebi

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Posted 31 March 2016 - 10:08 AM

On the wish list, I wish that we could set our own PSI on the sensors, to trigger wherever we want. That way I'd know if mine dropped below 50.



#37 OFFLINE   rbort

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Posted 31 March 2016 - 07:20 PM

I agree Steve, I blew mine up from 38 to 50 and I tried to retrain the tires and even though I went through the motions the TPMS sensor seems to only trigger at 26psi.  I would have liked to know when it hit 46 instead, but can't win them all...

 

-=>Raja.


Edited by rbort, 31 March 2016 - 07:21 PM.


#38 OFFLINE   drdiesel1

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Posted 31 March 2016 - 08:13 PM

I bet if I did an as build setup, I could change my TPMS sensor trigger threshold

to a higher pressure. Getting time to try it is the holdup :doh:

It wouldn't help anyone that wasn't willing to pay the dealer to reset it anyways.


Edited by drdiesel1, 31 March 2016 - 08:14 PM.


#39 OFFLINE   rbort

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Posted 31 March 2016 - 09:10 PM

I would expect so, I mean if it can be set at 26psi then it should conceivable be set at any number, just not user configurable it seems unless someone finds a way...

 

-=>Raja.



#40 OFFLINE   drdiesel1

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Posted 01 April 2016 - 05:04 PM

I would expect so, I mean if it can be set at 26psi then it should conceivable be set at any number, just not user configurable it seems unless someone finds a way...

 

-=>Raja.

User, no. IDS, yes ???  I've done it on trucks, but never tried it on the Max.  Eventually, I will get time to try it.










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