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- Jan 3, 2016
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I had a puncture the other day so while waiting for the new tyre to arrive I took the flat out of the car and left it in the garage thinking that once the new tyre is fitted everything will be back to normal. This didn't happen.
The TPMS is looking for 5 sensors, if one goes away the whole thing falls apart and you will end up with a trip to your local Toyota dealer to reset it. How I noticed this was after I replaced the tyre the TPMS flashed for about a minute when turning on the car and then turns solid after, it started doing this as soon as I removed the flat from the car but didn't give it much notice as I knew I had a tyre missing. Even by pressing the reset button nothing will happen, the light either keeps flashing or stays solid. The only way to get this fixed is by going to Toyota so that they can remove the fault codes and reset the TPMS system.
Toyota will probably tell you that the sensor might be damaged even before looking which is fair, it might have been damaged when the new tyre was fitted but there is an easy enough way to check this if you have a Realtek RTL2832 based DVB dongle as the sensors are transmitting on 433MHz and there is a handy driver to make the SDR receive the signals from the TPMS here https://github.com/merbanan/rtl_433
When I ran the check I got 5 signals so I knew the sensors were working so the only thing left to do was to ask Toyota to reset the whole TPMS system and clear off the fault codes which they done.
I only wish I can get some more info out of the TPMS using the SDR, it would be handy to be able to check the current pressure and temperature but I've not come across it yet.
So a handy tip, if you have Toyota TPMS, don't remove the tyre from the car, it freaks out and you will have to go to Toyota to reset it.
Cheers
hamba
The TPMS is looking for 5 sensors, if one goes away the whole thing falls apart and you will end up with a trip to your local Toyota dealer to reset it. How I noticed this was after I replaced the tyre the TPMS flashed for about a minute when turning on the car and then turns solid after, it started doing this as soon as I removed the flat from the car but didn't give it much notice as I knew I had a tyre missing. Even by pressing the reset button nothing will happen, the light either keeps flashing or stays solid. The only way to get this fixed is by going to Toyota so that they can remove the fault codes and reset the TPMS system.
Toyota will probably tell you that the sensor might be damaged even before looking which is fair, it might have been damaged when the new tyre was fitted but there is an easy enough way to check this if you have a Realtek RTL2832 based DVB dongle as the sensors are transmitting on 433MHz and there is a handy driver to make the SDR receive the signals from the TPMS here https://github.com/merbanan/rtl_433
When I ran the check I got 5 signals so I knew the sensors were working so the only thing left to do was to ask Toyota to reset the whole TPMS system and clear off the fault codes which they done.
I only wish I can get some more info out of the TPMS using the SDR, it would be handy to be able to check the current pressure and temperature but I've not come across it yet.
So a handy tip, if you have Toyota TPMS, don't remove the tyre from the car, it freaks out and you will have to go to Toyota to reset it.
Cheers
hamba