TPMS mystery question

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callipygian

callipygian

Joined
May 22, 2019
Threads
2
Messages
4
Location
North East NC
A few weeks ago, the TPMS light came on in my 2014 LX570 (original sensors, ~10+ years old). Figured it was dead batteries.Took it to Discount Tire and had them replace all 5 sensors, they decided on Alligator 591134 sensors. They couldn’t get the light to go off—tried twice, then sent me to a local indie shop (said they’d cover the cost). Indie shop also failed and told me to go to the dealer (1.5 hrs away).

So I grabbed a mini VCI OBD2 cable, installed Techstream on my Mac, and dug in.
Techstream findings:
  • All 5 new sensor IDs are correctly registered
  • Signal Check: "Transmitter ID not received" for all 5
  • Trouble Codes: Points to Transmitter ID 5 as the issue
  • Data List: N/A pressure/-40 temperature data for all sensors
  • Tried initialization button, rapid deflation to wake sensors, driving cycles — nothing
Questions:
  1. Are the Alligator 591134 sensors actually compatible with the 2014 LX570?
  2. Could a faulty #5 sensor be preventing the others from communicating?
  3. Any Techstream tricks I’m missing to force relearn or test individual sensors?
Appreciate any insight before I drive 3 hrs round-trip to the dealer. Thanks!

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Did you check the frequency with a handheld tool such as ATEQ? Your vehicle is probably set to read at 315 Mhz but it could be 433 Mhz. Your new sensors are dual band according to google (both 315/433) so it should work but sometimes they are faulty.
 
When the ID is receiving correctly, even if there is a dead battery on one sensor, you’ll get the pressures of the other sensors in Techstream.

So we can deduce none of these sensors are communicating.
 
My tire guy installed Shrader TPMS sensors in place of my expired Toyota OEM sensors, if I remember right, they were dual frequency. Adapting them to the vehicle wasn't so much of an issue , rather accuracy of PSI was off on Shrader sensors.
So as Grouchy Tech above post, stick to Toyota , Denso.... Not worth the headache .
 
Schrader supplies a lot of the OEM components for the TRW TPMS (Later ZF) which also supplied Toyota. Like a tier 3 or 4 supplier if you wish to call it that.
 
callipygian said:
I went back to Discount Tire yesterday evening, manager said he will order the OEM sensors and call me in a few days.
Click to expand...
Some discount tire locations really struggle with these, as the waking procedure isn't what they are used to. There will be a red tag on each one that explains the process, but many techs just toss it.

First, they will not be programmable like Discount's usual parts. Each has an alphanumeric ID on the sensor body that they must program into the vehicle.. this part they'll probably be comfortable with. My advice to you is to note the ID's and keep them written down somewhere.. having them can be useful for diagnostics in the future.

Second, they can't be woken remotely with their all-in-one TPMS programmer. The procedure is to apply pressure to seat the tire bead, then lower pressure back down to zero, then reinflate to your road pressure. After this they should be detectable by their programmer and the vehicle.
 
Not all aftermarket sensors are created equal. I've been using Autel double band for a long time including on my truck.
The programing has to be done via their tool, not TechStream. They can mimic a lot of OEM sensors from all over the world, some I never heard off. I never had to change the truck original sensors ID or mess with the truck programming. I just reprogram the sensors using same ID's. Precision is within 0.5psi compared to quality handheld pressure tester.
The tool can program the truck or diagnose issues reporting codes and erasing them, if I need/want to, can diagnose the sensors directly and through the truck computer.

For your truck, it looks like the sensors are not correctly programmed or they don't function correctly.

Anyway, that is water under the bridge, you'll get OEM sensors. Sorry for your wasted time.
 
With my other vehicle (also a Toyota) I was getting the continuous light though the pressure was fine. I knew one sensor had been replaced 4 years back, 1 was new as a 5th wheel in the new tire rotation. So at least one of the other three was dead. The other two I figured were close. So when there was a Toyota sale I bought three OEM sensors. Visited my local Big-O (which I like). Via their spiffy tester figured out which three were dead/near dead and replaced them within 30 minutes.

I have added new wheels and/or additional wheels on three different vehicles with TPMS and for all three I have bought OEM with a discount. I swap winter/summer shoes and don't want to screw around. I do the swap, check the pressure, drive, push the reset button and done. At this point in my life dealing with thirdparty vs the cost saving is a debit.

For the OP, I would kindly suggest asking for a discount on the OEM sensors for the inconvenience. Such a minor discount pays off in loyalty.
 
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