Cannot Enter Light Load Setting

[Alan Reagan]

I got the EVIC message this morning that my tire pressure is low. Since I'm not towing, I have the rears at 55 PSI. For some reason, it won't take the light load setting. The button will flash 3 or 4 times and then I get the message "Cannot Enter Light Load Setting". Anyone seen this?

 

[DBrooks]

Been playing a little with this, it seems since they officially consider 45 PSI "light load" 55 is just a little too high. I know 50 will work.

 

[Alan Reagan]

Makes sense. So I have too much in their for light load?



This is the pressure I've been since my last rotation 4000 miles ago.



The only difference this morning was that I had the truck on my shop ramp overnight which would have been about a foot higher on the front end than the rear. The rear wheels weren't on the ramp. I thought after I posted that additional weight on the rear end from the incline may have made the computer "sense" that the truck was loaded.



If it doesn't clear by this afternoon when I get home, I will drop the rears to 50 and see if that fixes it.



Thanks for the response. Too much air for a low air warning never crossed my mind.

 

[AH64ID]

To enter light load you have to be at the light load pressures on the door placard.

 

[Alan Reagan]

It's strange that it just did it this morning. It must be the cooler weather or something. I will set the tires to the door ratio this afternoon. Thanks for the info guys.

 

[DHuffman]

To enter light load you have to be at the light load pressures on the door placard.

Mine works fine at other pressures... I set mine with 56 psi rears with no issue.

 

[Alan Reagan]

Dhuffman,



Mine didn't either till yesterday morning. I run the rears at 55 as well.



DBrooks, thanks for that info of 50 psi. Yesterday when I got home, I parked in the shade and late yesterday evening, I checked the pressures. Both rears were at 56 psi. I dropped the pressure to 50 psi. I noticed that the air in the tires was very hot. Probably because of the 100+ degree weather we have been having here in Georgia for the past month.



This morning, the TPMS reset itself as I was pulling out of the driveway. The pressure in both rears showed 45 psi. By the time I got to work, the pressure in both was up to 48. I credit the still hot pavement for the rise in pressure.



Anyway, all is well for now until the temps cool off. Then I will have to increase the pressure. Otherwise, I will be down to below 40 psi when the first cold snap hits.



Thanks for the help, guys. AH64ID's tip to check the door (which I had done) made me realize that the pressures have to be right for the system to work. It is unfortunate that the system doesn't realize when I tell it to go to Light Load, that I know what I'm doing.

 

[JHumphries]

... It is unfortunate that the system doesn't realize when I tell it to go to Light Load, that I know what I'm doing.

How could you possibly know what you are doing?
You just a consumer that drives his truck his way, and pays for his own tires.
How could you possibly know more than the engineer that picked that pressure after several days of number crunching, computer simulating, and head scratching? :-laf

 

[AH64ID]

My 07 Tacoma would let me set the baseline, as long as it wasn't below 23 psi.

 

[Alan Reagan]

I rotated the tires yesterday, reset my pressures again. Of course, that put the previously low pressure tires on the front and the high's on the rear. At least that's what the computer thought.



When I left home this morning, the front's were showing 45 and the rears 65 and I didn't get a low pressure warning and the switch was in the "light load".



After about 6 miles, it picked up the correct pressures in the correct positions and all is well.



JHumphries, you are right. How could I know what I'm doing. THE RULES ARE ALWAYS CHANGING. :-laf

 

[SearsK]

What exactly is " light load setting". What does it do?

 

[AH64ID]

It reprograms the min pressures for the TPMS to set a low pressure indication. It allows owners to run lower psi when not towing/hauling to improve the ride and tire wear.