Bigboler
Posts: 48
Joined: Fri Mar 23, 2012 11:02 pm
Location: Vancouver BC

Re: Discuss Tire Registration function of Battery App

Sun Nov 17, 2013 5:36 pm

I gave this a try on my 2012 Canadian model, and it appears that the car has stopped talking to the tire sensors. I tried the instructions on page one several times but the app doesn't pick up the tire pressures anymore and the low pressure warning light is on, on the dash even though I have reinflated the tires to 40 psi.

Does anybody have any ideas to how to get the air pressure units back online? If all else fails I am going to take it to the dealer and play dumb.

Paul

User avatar
mwalsh
Posts: 9753
Joined: Thu Apr 22, 2010 10:10 am
Delivery Date: 05 Jan 2011
Leaf Number: 0213
Location: Garden Grove, CA

Re: Discuss Tire Registration function of Battery App

Sun Nov 17, 2013 5:40 pm

Bigboler wrote:I gave this a try on my 2012 Canadian model, and it appears that the car has stopped talking to the tire sensors. I tried the instructions on page one several times but the app doesn't pick up the tire pressures anymore and the low pressure warning light is on, on the dash even though I have reinflated the tires to 40 psi.

Does anybody have any ideas to how to get the air pressure units back online? If all else fails I am going to take it to the dealer and play dumb.

Paul

Have you tried disconnecting the 12v battery for a few minutes? I'm not saying it will work, but we're able to clear quite a few error codes from memory this way, so it might.

If you have a charge timer set, you'll have to set it again when you reconnect the battery.
2011 Blue Ocean SL with 86,000 miles
2015 pack on 12/30/15
Tinted windows
Bosch AGM 12v
Ecopia 422+ tires
L1 EVSE upgrade
FIAMM horns
Superbright LED lighting
2013 sun visors
LED shifter
Heated seats
GT-R map lamp lenses
Altima illuminated door switches

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

Sun Nov 17, 2013 11:30 pm

Once you start a tire registration you must complete it.

You will need to adjust your tire pressures back to the four unique values (35, 32, 29, 26). Then drive over 25 MPH until the registration completes. Don't go too fast or you might heat up the tires and take the pressures out of the range. You just need to keep driving until the Leaf sees each tire again. If not then recheck the pressures and try again.

Until you have non-zero registration values for all four tires you will get the tire warning light. It will not go away until the Leaf sees the tires during the registration window. Disconnecting the battery is not likely to help unless Nissan has stored the previous tire registration numbers.

marccbr
Posts: 138
Joined: Thu May 05, 2011 7:46 pm
Delivery Date: 05 May 2011
Location: San Diego, Ca. East County

Re: Discuss Tire Registration function of Battery App

Mon Nov 18, 2013 9:00 am

Bigboler and Turbo, I am having the same issue. Were you able to solve the problem? One thing that I did do wrong at first was that I canceled the registration the first time I started it because the tires were not set to the right pressure. After the cancellation I set the tires correctly and followed the instructions. When I hit the button to register the lights on the dash blink and after a couple of minutes they stop flashing but remain on (they do not turn off and then turn back on due to the low pressure) and the app button goes to green but no pressure are listed.

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 Nov 18, 2013 11:02 am

The problem is mine. (Wrong, read later posts. No problem with app.)

I assume you both are using the latest v0.28.12 version which supports reading the SOH value. Reading SOH is interfering with the Tire Registration operation.

Reading SOH is done on a timer basis about once per minute. This should be disabled while Tire Registration is being done or it will terminate the operation leading to what you are both seeing.

I will make a quick release (0.28.13) where I disable reading SOH while on the Service menu and then later today retest Tire Registration on my Leaf to be sure it still works.

Jim
Last edited by Turbo3 on Tue Nov 19, 2013 1:12 am, edited 1 time in total.

marccbr
Posts: 138
Joined: Thu May 05, 2011 7:46 pm
Delivery Date: 05 May 2011
Location: San Diego, Ca. East County

Re: Discuss Tire Registration function of Battery App

Mon Nov 18, 2013 11:10 am

Cool, thanks for the quick response.

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 Nov 18, 2013 1:10 pm

Just took a second look at my code and what I thought was happening can't happen.

Although there is a timer to enable reading SOH there is also a scheduler that will not let it happen while any Service menu operation is going on.

So I suggest waiting to retry Tire Registration until I have verified it is working as designed. I will also add a message to the app to make it clear if the registration completed normally or failed.

I will try to get it retested tonight or tomorrow afternoon.

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 Nov 18, 2013 6:34 pm

Just completed testing Tire Registration function. Did it three times. Twice with 0.28.13 and then again taking out the quick fix to 0.28.13 (basically back to 0.28.12) that was not needed and did nothing. Below is a screenshot after a successful registration. The first number under the start button changes from "0" to "f0" when it is successful. If it stays zero it failed. The second number changes to "1" while the registration is in process and changes to "2" when it is successful. It will go to "4" if it fails.

The step numbers (to the right of the Connected message) should cycle between 92,93,94 while the registration is in process. If not then let me know as that should not happen. Those three steps request tire registration status (the two number below button), tire registration numbers and the tire pressures. It should stay in that loop until status indicates completion (good or bad).

So bottom line is I don't see any issue with either 0.28.12 or 0.28.13.

Before you started tire registration do you recall what tire pressures the app reported? Were they similar to what you see on the second screenshot (order is probably different or you would not be doing a tire registration)?

Note that after a successful registration the tire warning light will come back on because the rear left tire is too low. You will also get a message to check tire pressure.

Image

Image

marccbr
Posts: 138
Joined: Thu May 05, 2011 7:46 pm
Delivery Date: 05 May 2011
Location: San Diego, Ca. East County

Re: Discuss Tire Registration function of Battery App

Mon Nov 18, 2013 10:52 pm

Alright problem solved. I did two things differently, the first and the most probable cause was that the tire gauge that I used was incorrect by about 2-3 pounds I found out by using a second gauge. When I rechecked I noticed that they were not matching so I set the pressures up with the second gauge. The second thing I did was use a different phone to do the registration but I don't think this was the cause since the first phone was able to connect once I completed the registration. Everything is good to go, I even used the app to set my tire pressures to be more accurate. Sorry for the extra work, Turbo.

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 Nov 19, 2013 1:11 am

marccbr wrote:Alright problem solved. I did two things differently, the first and the most probable cause was that the tire gauge that I used was incorrect by about 2-3 pounds I found out by using a second gauge. When I rechecked I noticed that they were not matching so I set the pressures up with the second gauge. The second thing I did was use a different phone to do the registration but I don't think this was the cause since the first phone was able to connect once I completed the registration. Everything is good to go, I even used the app to set my tire pressures to be more accurate. Sorry for the extra work, Turbo.
No problem. Glade you got it working.

I needed to revisit the code anyway. I will be improving the status messages during and after tire registration. The two numbers under the button were just meant for debug so I could see what the values were during the operation.

The hard part is getting the tire pressures adjusted right. The actual code that triggers it is just a single command. I went off in the wrong direction this morning with the "quick fix" because it looked like two people were having the same problem and the SOH reading code was a major change to the command sending routine. Sometimes the code is smarter than I remember and what I thought was happening (reading SOH during registration) could not have happen.

The newly released code does include a fix for displaying EV/HEV DTC values from 2011 and I think 2012 Leafs. Nissan for some reason used a different command and response format for the EV(VCM) control unit than for any of other 14 control units in the Leaf.

Return to “LEAF CANBus”