Quote:
Originally posted by Av1ator:
If you rotate the tires yourself isn't there an issue with the TPS system?
The dealer told me that only THEY could rotate the tires as you had to have a special tool to reset the TPS system..or is that just more BS???
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Maybe...
I thought there was an issue of relearning the sensors to the BCM. However, I just rotated my tires, and there is no TPM warning. Now, until I can confirm on Monday with the engineer in charge of this system, I will assume the following.
Since these sensors are not corner specific (like on the system used on Vettes that signals air pressure in each specific tire), the BCM has no idea what corner they are in, and as long as it receives a signal from all four, it is a happy BCM. Now, I did a four wheel rotation, not a five wheel.
If you do a five wheel rotation, the spare, which has a sensor that has not been learned, will send a signal to the BCM it does not recognize, and the tire that became a spare will not be picked up by the BCM. So, if appears if you do a five wheel rotation, you have to learn the sensors to the BCM.
As for learning the sensors, there is a procedure in the owner's manual, where after rotation, you signal the BCM to go into learn mode, and then lower by at least 10 psi (or raise by 10 psi) the pressure in the tires. I believe it says to start with the front left, then rotate around the car. The horn honks twice when the sensor is learned, and then you go to the next tire/sensor.
The dealer does have a reed tool that when they go into the learn mode, all the do is put the tool next to the stem, and push a button, and then the system learns that sensor.
So, yes the dealer has a tool that is easier to use, but yes, you can do it yourself.