write TPMS sensor ID to ECU with xtool TP150 (solved)

[Gx460 2013]

I originally posted this as a question, but since I've figured it out, I'm editing it with instructions.

Problem:
I wanted to load a new marsflex TPMS Sensor ID into my 2013 GX460 ECU (before installing the TPMS transmitter into the tire).

I had trouble figuring this out because all the 'programming' options in the xtool TP150 are for programming sensors, not the ECU.

Solution for 2013 GX460 (pretty simple):

• Find Bad Sensors
  • xtool TP150 -> TPMS -> Asia -> Lexus -> GX Series -> 2003.08-2017.08 (315 MHz) -> Check
    • Measure each tire pressure by clicking the wireless button and waiting at least 1 minute, holding the xtool next to the stem.
    • Wait at least 1 minute for each tire.
    • Tires with dying batteries may take around 1 minute to update.
    • This identifies sensors that need to be replaced.
• Add Replacement Sensor to ECU before installing in Tire
  • xtool TP150 -> TPMS -> Asia -> Lexus -> GX Series -> 2003.08-2017.08 (315 MHz) -> Check
    • Measure each 'good' tire's pressure at the stem.
    • For bad tires, move away from the car and measure each replacement sensor's pressure (to record its Sensor ID in the xtool TP150)
    • 
    • At the end of this, the xtool will have the Sensor ID's of everything you want to write to the ECU
  • Connect xtool to ODB port with cable. Energize car.
  • xtool TP150 -> TPMS -> Asia -> Lexus -> GX Series -> 2003.08-2017.08 (315 MHz) -> Relearn
    • This writes everything you ust measured with the xtool (including the new sensor ID's) to the ECU.
• Check that it worked (by reading from the ECU)
  • xtool TP150 -> TPMS -> Asia -> Lexus -> GX Series -> 2003.08-2017.08 (315 MHz) -> Diagnostics
  • 
    

 

[blackthecrowes]

I'm currently in TPMS hell also - I had one bad sensor but I'm predicting more (hence justifying to myself the cost of the diagnoistic tool)
I simply coded the new sensor to the dead one's ID. Next step is finding a dry day to install into the tyre!

 

[r2m]

I'm currently in TPMS hell also - I had one bad sensor but I'm predicting more (hence justifying to myself the cost of the diagnoistic tool)
I simply coded the new sensor to the dead one's ID. Next step is finding a dry day to install into the tyre!

How old is your rig? I have a 2013 GX luxury trim and my TPMS started to go out a couple years ago, or about at about 10 years mark.
So if your TPMS have been in your rig 10+ years, I suggest to just bite the bullet and swap them all out.