Okay... I guess I misunderstood what that was for. I thought it let you reset the tire pressure to what you wanted. If you rotate the tires, I'm assuming you would have to readjust tire pressures because the front tires have different settings that the rear. Once you do that, the dash display telling you that your tires are low (in the rear because the front tires are now on there) would reset itself. Why would you then need to use the procedure I linked to? Someone please un-confuse me...

 

I haven't done it in a long time but the reset procedure requires you to go to each tire and let some air out starting with the driver front and proceeding around the front of the truck, passenger rear and driver rear. The truck honks the horn when enough air is let out on each tire. The system detects the change in pressure in each tire, it logs the sensor id in that position so it know which two are the front and which two are the back. Then it operates as any TPMS system alerting the driver if the pressure drops below a certain percentage of the recommended pressure. OEM pressure is 80 rear and 65 front and the tpms alerts at about 67ish and 55ish.

I'm going off years-old memory here but that's how the reset worked on my previous truck.

 

There are two TPMS reset methods, the one in the book, and one not in the book.

I thought the pressure level is set to 'position' of the tire, so front left reader expects X PSI, rear left reader expects Y PSI.

When you rotate the tires, you're just telling the truck which tire is now at which sensor. The PSI requirement for that specific location doesn't change. [ This is my understanding at least, and it uses whatever setting is programmed in the truck, which you can change via Forscan ]

The sensors can actually be read pretty far away, so the truck can't isolate very well. For instance, my platinum wheels are in my garage. When I startup my truck in the driveway (About 12 feet away from where the tires are stored), i read all 4 tires.. and the truck thinks my TPMS is working fine. About 10 minutes later, I'll get complete TPMS failure as it rescans and sees there are no tires present. haha.

The second TPMS reset procedure that isn't in the book, is required if you've completely changed your TPMS sensor, and they've never been register on the truck before. (It involves pumping brake, turning truck off, on, off, on, off, on.. pump brake, turning truck off, on, off, on, off, on.. you'll hear double horn honk, then you have to use a programming tool at each wheel to 'train' it. Specifically the Motorcaft TPMS19. Runs about $35 on Amazon),

 

This is great to know! I'll just lower mine without changing anything in the truck programming!

65 is the standard for the fronts right? Any suggestions on this?

 

I'm currently running 62 in the rears. Within a mile they have warmed up to 65 and no alarms.