TPMS Sensors

[civicdrivr]

TPMS sensors are replaceable, but the big question is what frequencies are the sensors on that allows them to talk with the ECU.

And of course, will we be unable to disable TCS/VSA with the TPMS sensors removed.

[MTeator]

Originally Posted by civicdrivr

And of course, will we be unable to disable TCS/VSA with the TPMS sensors removed.

if my wheels arrive Friday I'll be able to answer that then.

[dsgerbc]

Originally Posted by civicdrivr

And of course, will we be unable to disable TCS/VSA with the TPMS sensors removed.

Looking through Scion VSC description on TIS right now. I see no references to TPMS.

[dsgerbc]

Originally Posted by Primo86

I am unsure if this is the case with other German cars let alone Japanese, but I can't imagine it would be that different.

It seems that new sensors will have to be registered with the ECU first.

[neutron256]

Originally Posted by civicdrivr

TPMS sensors are replaceable, but the big question is what frequencies are the sensors on that allows them to talk with the ECU.

And of course, will we be unable to disable TCS/VSA with the TPMS sensors removed.

Frequencies are important but there are only a few different ones that are used. Most common in the US is 315Mhz. Just as important is the protical used which is different for pretty much every manufacturer.

[neutron256]

Okay now that I have my BRZ I've been playing around with TPMS a little this morning and made a few discoveries.

1. The sensors are 315Mhz
2. They are compatable with Toyota TPMS protocals
3. The ECU does not appear to be programmable with the ATEQ quickset tool (latest firmware QD1-44)

I have a ATEQ VT-55 which lets me read the sensors, but not the OBDII attachement that lets you program ECU so I can't say if it would work or not but I doubt it.

I'll be playing around with this a little more later today. I haven't tried every possible Toyota/Scion/Subaru Make/model combination for the Quickset yet. I'm also going to contact ATEQ and ask them about firmware updates to support the BRZ/FR-S.


Edit:

Here are the sensor readings from I was able to get with the VT-55

---- LEFT FRONT ----
Sensor ID : ID: 1295AE
Pressure : 35.4 PSI
Temperature : 60 F
Sensor state: WAKE
---- RIGHT FRONT ----
Sensor ID : ID: 12952D
Pressure : 35.4 PSI
Temperature : 62 F
Sensor state: WAKE
---- RIGHT REAR ----
Sensor ID : ID: 12952C
Pressure : 34.4 PSI
Temperature : 57 F
Sensor state: WAKE
---- LEFT REAR ----
Sensor ID : ID: 129524
Pressure : 33.9 PSI
Temperature : 60 F
Sensor state: WAKE

[Dave-ROR]

Originally Posted by civicdrivr

TPMS sensors are replaceable, but the big question is what frequencies are the sensors on that allows them to talk with the ECU.

And of course, will we be unable to disable TCS/VSA with the TPMS sensors removed.

315Mhz according to Tire Rack.

Are you sure we are unable to disable TCS/VSC? Not all cars do that but I do fear the BRZ might.

[dsgerbc]

Originally Posted by neutron256

Okay now that I have my BRZ I've been playing around with TPMS a little this morning and made a few discoveries.

Thanks. Nice to know that at least the $400+ tool can read those. My outdated and abandoned by manufacturer $150-dollar tool couldn't
Let's hope that ATEQ is quick to update their quickset tool to work with BRZ/FR-S
Do you know what manufacturer protocol those use? Toyota usually uses Pacific and TSW, iirc.

[dsgerbc]

Originally Posted by Dave-ROR

Are you sure we are unable to disable TCS/VSC? Not all cars do that but I do fear the BRZ might.

I pretty much doubt that. I looked though Scion VSC description/repair/diagnostics in TIS and there are zero references to TPMS. I'm probably gonna try a few wheels I have over the week end so I'll know for sure.

[Dave-ROR]

Originally Posted by dsgerbc

I pretty much doubt that. I looked though Scion VSC description/repair/diagnostics in TIS and there are zero references to TPMS. I'm probably gonna try a few wheels I have over the week end so I'll know for sure.

Cool. I wish I had a 5x100 wheel/tire to test with.. sadly no such luck here

[dsgerbc]

Originally Posted by Dave-ROR

Cool. I wish I had a 5x100 wheel/tire to test with.. sadly no such luck here

I also have Legacy GT rear pads laying around, and I plan to see if they fit

P.S. You might be able to test it with wheels off and car on jackstands....

[neutron256]

Originally Posted by dsgerbc

Thanks. Nice to know that at least the $400+ tool can read those. My outdated and abandoned by manufacturer $150-dollar tool couldn't
Let's hope that ATEQ is quick to update their quickset tool to work with BRZ/FR-S
Do you know what manufacturer protocol those use? Toyota usually uses Pacific and TSW, iirc.

No unfourtanatly the with the VT-55 you just select the Manufacturer and it gives you ID, temp, pressure and battery status. It doesn't tell you which protical it received.

I've always wanted the OBDII module but I can't complain for something I got for $200 off eBay. The Quickset is a nice way to bridge the gap, or at least it was in my other cars.

[Dave-ROR]

Originally Posted by dsgerbc

I also have Legacy GT rear pads laying around, and I plan to see if they fit

P.S. You might be able to test it with wheels off and car on jackstands....

Test those pads ASAP please!!

After posting that I realized the spare likely doesn't have a TPMS sensor so I can just install that on the front and find out :P

[dsgerbc]

So I put my Subaru wheels on. Went for a drive. A loooong one, the TPMS light did not come on. Drove some more - light didn't come on. Then I stopped and read the manual. Light does not come on if the system does not sense any sensors.

Naturally, the "vsc-off" button works as normal.

Originally Posted by Dave-ROR

Test those pads ASAP please!!

Seems like the answer is no.
I'll post a pic in a few in some thread that might be relevant.

After posting that I realized the spare likely doesn't have a TPMS sensor so I can just install that on the front and find out :P

That might be the only way to test the-now-irrelevant question