tire pressure light question??

just lifted my 06 tacoma with 6" suspesion and 3" body lift and put 35 mickeys thompson baja claws on it. now my tire pressure light goes on for a little while and then turns off and does it over and ever again. is there any way to prevent it from going on again???

 

How does the tire pressure monitoring system work?? (technical)

 

In short each tire including the spare has a pressure sensor that sends a radio signal to the truck. When any of the sensors send a result lower than a few PSI below what the truck is expecting it sets off the warning light. (low technical)

 

Are they battery powered, or RF activated?

 

I can't remember where I read it but I think it is battery powered with an expected 10 year life.... But I've been wrong before.

 

I know the TP system is different than on some other Toyota vehicles but I don't think it actually senses the real pressure in the tire but more the rotation speed. I could be wrong. HOWEVER you should have a button that allows you to reset the TP monitor which basically tells the truck that what it's currently got is the baseline and it monitors from there.

 

I know that on at least the 06 and up it measures actual pressure. The spare is the most likely tire to read low because no one remembers get under there to add air to it. I know it scared the heck out of me when the low pressure light came on while I was on the highway heading to work.

 

jhodge83 how do i reset the sensor? do i have to get the ecu tuned for that?

 

thanks 4 da info everybody....

 

you may actually have to have the dealer reset it for you. pushing the button under the dash usually works, but with the way your light comes/goes, im not really sure.

 

I had the same problem with mine. The TPMS seems like a good idea for the person that rarely checks or cannot properly check their own tire pressure. I disconnected mine after the tires and lift. The TPMS ecu is behind the dash and requires a lot of work to get to it. You can just unplug it, but then you still have to override the indicator lamp. Nothing too hard and no special tools required.

 

new rims?

 

There are instructions on how to set it in the owners manual. I don't remember the exact steps and don't want to steer you wrong by guessing.... I also don't want to walk out to my truck to look it up.

 

you have to set the tire pressures to what ever the door sticker says any thing else will cause the light to come on.

to reset the light it usually involves using a special tool that the dealer will have. certain type of sensors are mounted inside the tire called rim mounted these take a special tool to train, others are valve stem type these take a round magnet to train

trust me on this guy im a professional

 

OK Here it is from the 2006 tacoma owners manual.

To initialize the system perform the following:

1. Park the vehicle at a safe place and apply the parking brake. Stop the engine.

2. Adjust the pressure of all the installed tires (including the spare) to the specified level.

3. Turn the ignition key to "ON".

4. Push and hold the reset switch until the low tire pressure warning light blinks three times.


There is a notice as follows:

Do not push the reset switch without adjusting the tire inflation to the specified level. Otherwise, the low pressure warning light may not come on even if the tire pressure is low, or it may come on when the tire inflation pressure is actually normal.

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Quotes over

The TPWS sets whatever pressure the five individual sensors are reading when you reset the system as correct. If you reset the system and you only have 20 PSI in one of your tires the truck will consider that to be correct and not display a low pressure warning until the tire would be almost flat. Also if you have a pressure of 45 PSI in a tire the system would end up displaying a low pressure warning when that tire would get down to about 35ish PSI. Yes I'm using extremes for my examples.

 

then your light is probably on i think its +/- 3psi

 

There is a thread on either TN or Custom Tacos to disable / bypass the whole system. I tried to pull up TN, but the site is down right now. Access to bypass it is done by removing the glove box to get to the harness. The guy who did the mod also made it so it can be reversed if needed. I haven't had any issues with mine yet, but if I do I'm going to disable it.