02 Q45, tire pressure monitor

[ahmed_wasim]

The display shows four tires from top to bottom. Anyone knows how to map them.

It would have been nice if the display showed the location of the tire like FR, FL, RR and RL.

[mcrews]

I dont believe it does.

The display shows four tires from top to bottom. Anyone knows how to map them.

It would have been nice if the display showed the location of the tire like FR, FL, RR and RL.

The sensors are probably numbered in order 1 2 3 4, but when you rotate the order would change.

you just need to figure it out by using a hand gauge then matching that reading to the display.

[qship96]

One of the dumbest, under-engineered systems of the 02-06Q. Hey, you got a warning for tire #3 low on air......up to you to figure out WHICH tire is considered #3, and its position changes at every tire rotation......just silly

[StarPD]

The display shows four tires from top to bottom. Anyone knows how to map them.

It would have been nice if the display showed the location of the tire like FR, FL, RR and RL.

Sensors are inside the tires, not at fixed wheel locations, so there is no way to automatically determine which reading is for which wheel. Best way to learn which location is in which position on your display is to lower or raise one tire by about 4 lbs and drive slowly for a block or two until the system activates and note which item on the display reads low or high, depending on whether you've set it low or high. Make a note of it, and repeat for each wheel. That will tell you which item on the display is for which wheel. If you rotate tires, you'll have to remember which wheels you relocated or perform the testing again.

Actually, the TPS should not replace regular checking of air pressure (dead cold first thing in the morning). It only serves to let you know that a tire is low so you know to check them in the event of a leak or puncture.

Also note that the readings can be misleading. Let your car sit in the sun for a while, and the tires on the side facing the sun will read higher than the ones opposite due to the expansion of air from the sun load. That's another reason to always check your tire pressures cold in the morning before the sun has had a chance to warm up one side or the other.

This expansion from sun load can occure even when driving, which will explain why even though you've carefully checked pressures cold, the readings on the display will vary from trip to trip, or even from time to time on the same trip.

Also, the higher you keep your tire pressures cold (within Mfrs recommendation of course), the less variation you'll get from cold to hot, as the tires flex less under higher pressures, resulting in less self-generated heat in the air in the tires.

My '05 Q45 has the same system yours does, and I do use it to monitor tire pressures. My wife's '08 Civic EX-L coupe has a TPS too, but doesn't display pressures, only warns if one or more tires are low with a warning light on the dash. I know it works, because the dealer service department inadvertently set one tire too low, and the light came on. I checked them, and found the low one, and had them add more nitrogen to all of them about 6 lbs over what I wanted, then bled them down to my preferred pressures next morning when cold. No light after that.