LenniePaz

My daughter has an '09 tC and the tire pressure light is on. I checked the tire pressure and they were all at 34 psi. I took it to my buddy's shop and he hooked it up to his computer. All the sensors registered so he reset them. The light went out, but now 4 days later, it's back on. I tried pressing the button in the glovebox and holding it down, but absolutely nothing happens. Anyone know what the problem could be?

RyanstC

iTrader: (12)

Could be a sensor going bad or not sending a signal to the computer, try releasing the air down below 20 psi as quickly as possible in each tire then after you are done with that air them back up to the recommended setting with the key in the on position then try to press the reset button again. The releasing of the air will activate the sensors if they aren't responding well and usually that will fix it. If that doesnt solve it then one of the sensors has to be going bad

RyanstC

iTrader: (12)

Forgot to ask, has she had any of the tire pressure sensors replaced?

LenniePaz

We bought the car from a Nissan dealer where I work. They put on 4 new tires, and told me I needed to take it to a Toyota dealer to get the light reset. I know the sensors are in there because they all registered when my buddy hooked it up to the Snap On scanner.

When you say let the air out of the tires down to 20 psi, do you mean one at a time, or should I let the pressure out on all four down to 20 psi and then fill them all up? The key needs to be in the on position while I'm filling them?

RyanstC

iTrader: (12)

When you say registered do you actually mean that they are reading the same pressures or are the id numbers for the pressure sensors being displayed?

LenniePaz

I looked at the screen real quick after my buddy said they were registering, so I only saw the id numbers. I'm not sure if the actual pressure was showing up on the screen. I'm assuming the actual pressure should be on the screen along with the id numbers?

RyanstC

iTrader: (12)

They should be but if one has been replaced it might still have the old id number in the system if thats the case. But i dont know what the Snap-On scanners show since we use a Toyota scantool at the dealer

LenniePaz

Should I try your suggestion of letting the pressure out to 20 psi?

RyanstC

iTrader: (12)

It wouldn't hurt to try it, sometimes its possible that a sensor will go into a sleep mode and letting the air out quickly will usually "wake" the sensor up. If that doesn't work then its possible that a sensor could of been damaged or cracked during the installation of the new tires. Its hard to tell because i dont know all what the snap on scantools show

LenniePaz

Okay, thanks for all the help. I will try your suggestion, if that doesn't work, I'll take it back to my buddy's shop and hook it up to the scanner. I'll pay more attention to the screen and let you know what it reports.

RyanstC

iTrader: (12)

Sounds good, let me know thanks

MikeC

iTrader: (1)

Check to see if the spare has a sensor too ;)

Lil_Deuce_tCoupe

iTrader: (9)

You have to hold the reset button until the light blinks 3 times - if you don't, and just hold it until the light goes out, it will come on again after driving a few miles.
Initialization procedure here:
https://www.scionlife.com/tech/manual/?manual=tc05_0572

LenniePaz

I know that. Didn't you read the part where I said I pushed it in, and held it in, and it did nothing?

Jon

Biting the hand that feeds you is never a good idea. He was just trying to help, something no one is obligated to do.

LenniePaz

Biting the hand that feeds me? I simply asked him if he read that I already tried that.

Jon

The way it's written just seems a little rude. As if to say, "Can't you read?"

LenniePaz

My bad. I didn't mean it to sound like that.