New Rims/ TPMS sensors?

[BigWillie]

Well that sucks ass! I still think this system is useless. Just another dealer only service that you can get hosed for! I really miss my '03 Tundra...WHY...WHY....WHY did I trade!?!?!?!? *cocking hammer back on the revolver*

[Import Tire]

Originally Posted by wilfredcruz

When you reset it, as th emanual says. all you are doing is reseting the threshold pressure. The sensors will detect the difference in pressure, not the actual pressure at a given time, for example if you reset your set and your pressure was a 32 the light will come on once the pressure drops to 6lb (??) under the set value of 32psi. .If you reset it at 25 psi then the light will come up once the pressure drop 6lb under 25!. Read the manual. The sensor doesn't know the actual pressure on tire, it will only "see" the difference in pressure.

If you change your sensors you need to input the sensors ID in the Toyota ECM, to do that you need to have a Toyota programmer for the ECM (cost a lot of cheeseburgers). There are other vehicles that you just reset it and thats it, NOT with the Camry you need the ID in the ECM to have communication.

This is not quite true. The reset button under the dash does not reset the threshold pressure. The reset button under the dash allows you to rotate the tires and have the system detect the new locations for the transmitters.

However, if you replace a transmitter on the Camry, then yes you will need to have the sensor id entered into the ECM. Toyota is the only manufacturer that this reprogramming is required afaik...all the others you just press the reset button, it finds the new sensor and you are good to go. As an independant tire dealer, the introduction of the TPMS systems has led to a lot of confusion and misinformation, as well as added time and cost. The owner's manuals don't always indicate the correct procedure (as is the case on the Camry). Most dealers I've spoken with hate the TPMS systems as well because of the amount of time required.

Oh yeah, and something to think about...the valve stems which are part of the sensor are exposed to the elements all the time. For those of us in the areas where salt is used on the roads, the sensors are going to start to corrode sooner rather than later. Sensors for most GM's run about $50 each. Sensors for most Hyundais run about $10 each. Sensors for most Toyotas run $100 to $200 each! And they're all similar technology.

Robert
Import Tire Co.

[BigWillie]

Originally Posted by Import Tire

This is not quite true. The reset button under the dash does not reset the threshold pressure. The reset button under the dash allows you to rotate the tires and have the system detect the new locations for the transmitters.

However, if you replace a transmitter on the Camry, then yes you will need to have the sensor id entered into the ECM. Toyota is the only manufacturer that this reprogramming is required afaik...all the others you just press the reset button, it finds the new sensor and you are good to go. As an independant tire dealer, the introduction of the TPMS systems has led to a lot of confusion and misinformation, as well as added time and cost. The owner's manuals don't always indicate the correct procedure (as is the case on the Camry). Most dealers I've spoken with hate the TPMS systems as well because of the amount of time required.

Oh yeah, and something to think about...the valve stems which are part of the sensor are exposed to the elements all the time. For those of us in the areas where salt is used on the roads, the sensors are going to start to corrode sooner rather than later. Sensors for most GM's run about $50 each. Sensors for most Hyundais run about $10 each. Sensors for most Toyotas run $100 to $200 each! And they're all similar technology.

Robert
Import Tire Co.

So I was right about using the button to reset the system, but it seems I have cold weather issue 'below freezing', any ideas? I checked my air pressure one morning when at the freezing temps and it was 30 PSI and isn't the system set to go off at 25 or 26 PSI?

I'm sorry, am I getting off topic!?

[Import Tire]

Originally Posted by BigWillie

So I was right about using the button to reset the system, but it seems I have cold weather issue 'below freezing', any ideas? I checked my air pressure one morning when at the freezing temps and it was 30 PSI and isn't the system set to go off at 25 or 26 PSI?

I'm sorry, am I getting off topic!?

Sounds like there's some water in the system somewhere. I don't buy into the Nitrogen hype, but you may want to replace the air in the tires with Nitrogen to see if the air that was used to inflate them when you last had them changed had a little too much water in it. That could be condensing and freezing on/in the sensor and causing the problem. If you can't find a place that has nitrogen, replace it with 'new' air, hopefully from a dryer source. Also, the next time you have the problem, you could bring the car to a tire dealer and have them use a TPMS diagnostic tool to determine which sensor has the problem.

Also, don't forget to check the spare tire pressure...it has a sensor as well.

As far as what pressure the system will signal a problem at, I think it may be as little as 2 to 3 psi below the recommended pressure, which is indicated on the sticker on the door.

Good luck, and let me know what you find out.

[repocop]

mine don't even work anymore, i took my car in to get the oil changed, asked that they fill the tires to my usual pressure because they felt very low (36psi, comfort be damned) and he told me they were all 4 at 19PSI
... no light.


*shrug*