bigrob90
Posts: 182
Joined: Fri Oct 31, 2014 3:41 pm
Delivery Date: 31 Oct 2014
Leaf Number: 316941
Location: Atlanta, GA
Contact: Website

Re: Discuss Tire Registration function of Battery App

Fri Dec 26, 2014 4:31 pm

bryand wrote:Build date was 23rd October 2014, so that probably makes it a "2015" model, yes.
Interesting. The owner's manual makes no mention of this feature.
Cayenne Red 2015 Leaf S w/QC
2 year, 15k lease

muus
Posts: 186
Joined: Mon Jun 28, 2010 9:48 am
Delivery Date: 16 Jun 2014
Location: Ottawa, ON, Canada

Re: Discuss Tire Registration function of Battery App

Mon Jan 05, 2015 3:05 pm

Just a quick note to say that I was able to register the TPMS modules in my winter wheels. I'll be doing this twice every year. Thanks for the great app Turbo!
2014 Leaf SL (Gun Metal Grey)
Upgraded Panasonic EVSE (20A)
JuiceBox bought from Kickstarter
23 months 50,000 KMs
Leaf Spy Pro: 62Ahr (up from a low of 50Ahr)

Turbo3
Gold Member
Posts: 2011
Joined: Mon Jul 19, 2010 8:34 pm
Delivery Date: 12 May 2011
Leaf Number: 002191
Location: San Jose, CA

Re: Discuss Tire Registration function of Battery App

Tue May 12, 2015 6:10 pm

There is a bug in Tire Registration if you try to start Registration while in Park.

Until I release the next version of LeafSpy Pro with the fix please take the Leaf out of Park and wait 30-60 seconds before pressing the Start Tire Registration process.

To be clear, you don't start the Tire Registration process until the Leaf has been driven at least 300 feet to be sure the TPMS units in each wheel are awake and transmitting their IDs. If the TPMS units are not awake and transmitting their IDs there is no point in starting the Tire Registration process. I will try to enforce this in the next release by not enabling the START button until LeafSpy detects the Leaf is in motion.

Turbo3
Gold Member
Posts: 2011
Joined: Mon Jul 19, 2010 8:34 pm
Delivery Date: 12 May 2011
Leaf Number: 002191
Location: San Jose, CA

Re: Discuss Tire Registration function of Battery App

Mon Aug 10, 2015 10:13 am

bryand wrote:I'm using LeafSpy Pro v0.35.39 with a Nexus 7 tablet on my 2014 UK-built Leaf.
Most of LeafSpy works fine, but the tyre registration is completely dead - the setup page just shows a string of zeros for every wheel and the calibration is never flagged as complete. This suggests that the tablet isn't receiving anything from the sensors.
However, when I adjust the tyre pressures for LeafSpy's calibration procedure, the Leaf picks up the low pressures on the rear wheels and flags a problem, so the wheels seem to be doing their thing OK.
Also, when I use Leaf Stat on an iPad Air using a WiFi dongle, I get a numeric value for each tyre pressure. So it seems the iPad can receive the wheel's transmissions, but the Android devices can't, whether using a Bluetooth or a WiFi dongle (I have tried 2 other Android devices - same result).
I think European TPMS sensors work on a different frequency to US ones - is that the problem?.
Is there a workround for the problem?
For new UK Leafs Nissan has changed tire registration to make it controllable from the dash and they now display which tire is low on the dash car graphic.

When they did this Nissan dropped support for the way LeafSpy does tire registration since it is no longer needed. They also dropped support for the way LeafSpy reads the tire pressures.

Those with new UK Leafs will need to go to the Settings/Tire Pressure panel and select "Use alternate method to read tires" to get tire pressures readings to be displayed by LeafSpy. You still need to be driving the Leaf to wake up the TPMS units for the pressures to be sent and displayed.

garsh
Posts: 1173
Joined: Sat Feb 12, 2011 5:27 am
Delivery Date: 05 Apr 2012
Location: Pittsburgh PA

Feature Request

Thu Dec 17, 2015 9:01 am

Ideally, measurements of tire pressure would be both precise and accurate.
Image
In reality, I get the impression that TPMS sensors are fairly precise, but not very accurate. Furthermore, different TPMS sensors appear to be differently inaccurate. I can carefully fill each tire, check the pressure of each tire with the same tire gauge, confirm that it shows them all as exactly the same, but when I start Leaf Spy each tire will show different pressures, with differences approaching 2psi.

The OCD in me loves trying to keep all of my tires at the same pressure. But the inaccurate TPMS sensors make this difficult.

What do you think about adding a button to Leaf Spy that can be used to calculate a scaling factor to be applied to each TPMS sensor reading so that they all report the same value? The scaling factor would be stored & used from then on until removed or reset.
2012 Black SV, bought 2012-04-04, sold 2019-05-10. 7 bars, 101,850 miles.
Current rides: 2018 Tesla Model 3 Performance, 2018 Chevrolet Volt LT

TimLee
Posts: 2811
Joined: Thu Jan 20, 2011 9:40 am
Delivery Date: 17 May 2011
Leaf Number: 2026
Location: Chattanooga, TN

Re: Feature Request

Fri Dec 18, 2015 10:45 am

garsh wrote:... I can carefully fill each tire, check the pressure of each tire with the same tire gauge, confirm that it shows them all as exactly the same, but when I start Leaf Spy each tire will show different pressures, with differences approaching 2psi.
...
I had some difficulty the one time I used LSP tire registration process.
My gauge readings weren't quite close enough to the required values based on what TPMS was reading.

But they were not 2 psi off.

When I had Costco add nitrogen to 44 psi the other day, the TPMS readings are within 3/4 psi.

Close enough.

Tim Lee
Chattanooga, TN

Man. Date: 03/10/11, VIN # 2026
Delivered 05-17-2011
Blue Ocean, 2011 SL-eTec

Turbo3
Gold Member
Posts: 2011
Joined: Mon Jul 19, 2010 8:34 pm
Delivery Date: 12 May 2011
Leaf Number: 002191
Location: San Jose, CA

Re: Feature Request

Fri Dec 18, 2015 11:41 am

TimLee wrote:
garsh wrote:... I can carefully fill each tire, check the pressure of each tire with the same tire gauge, confirm that it shows them all as exactly the same, but when I start Leaf Spy each tire will show different pressures, with differences approaching 2psi.
...
I had some difficulty the one time I used LSP tire registration process.
My gauge readings weren't quite close enough to the required values based on what TPMS was reading.

But they were not 2 psi off.

When I had Costco add nitrogen to 44 psi the other day, the TPMS readings are within 3/4 psi.

Close enough.
For tire registration, if your gauge is not close enough then just increase the PSI separation to 3.5 PSI. They don't have to be those exact values. Leaf is just looking for a delta difference between them. Keep the lowest value at 26 PSI and add a 3.5 PSI delta as you go around from back to front.

Something is wrong/out of spec if you have a 2 PSI difference from the TPMS reading. If it is just one tire I would say the TPMS is out of spec. If all tires are off then the gauge is the most likely source assuming the readings are right after you start driving and not 20-30 minutes later when the tires have heated up. If you have switched to a different wheel with non-factory TPMS then that might be the problem.

garsh
Posts: 1173
Joined: Sat Feb 12, 2011 5:27 am
Delivery Date: 05 Apr 2012
Location: Pittsburgh PA

Re: Feature Request

Sun Dec 20, 2015 3:41 am

Turbo3 wrote:Something is wrong/out of spec if you have a 2 PSI difference from the TPMS reading. If it is just one tire I would say the TPMS is out of spec. If all tires are off then the gauge is the most likely source assuming the readings are right after you start driving and not 20-30 minutes later when the tires have heated up.
Yep, before heating the tires up.

Given that the gauge is used to measure all four tires, and that it consistently shows the same reading for each tire even when I make multiple reading attempts on each tire, I don't think we can say that the gauge is at fault.

TPMS sensors simply aren't made to be that precise. Here's an example spec page which says that the accuracy is ±1PSI.
If you have switched to a different wheel with non-factory TPMS then that might be the problem.
Nope, happens with both my OEM wheels & sensors as well as the other non-OEM set I use in the summer.
2012 Black SV, bought 2012-04-04, sold 2019-05-10. 7 bars, 101,850 miles.
Current rides: 2018 Tesla Model 3 Performance, 2018 Chevrolet Volt LT

NoMoreTDI
Posts: 2
Joined: Tue Dec 13, 2016 5:03 pm
Delivery Date: 14 Dec 2016

Re: Discuss Tire Registration function of Battery App

Mon Dec 23, 2019 9:09 pm

I'm intentionally resurrecting a Zombie Thread to say thanks to Turbo3! I couldn't be happier to report how easy it was to register a second set of wheels/TPMS for my new / used winter set. I bought LeafSpy Pro the week I bought the Leaf for battery monitoring, and the hope of tire rotation, but this was definitely worth the $. Thanks again!

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