Tire Pressures not read 2017 LC

[shaytun]

I recently filled my tires with air while the car was off from 30psi to 33psi. Turn the car on to drive and the TPMS is not reading any of the tire pressures. The light is not on. I tried resetting the TPMS with the button underneath the driver's side and it still won't read it after multiple drives. Strange how this happened right after filling the tires. Any thoughts?

 

[2021 LC200]

Can you explain some more what you did?

Reason I say is that at initial start up I need to drive a bit for the pressure to show up so depending on what you did and in what sequence that can have an impact

With a running engine bleeding down seems to work “live”. Makes sense so you can get warned for a flat tire.

Going back up live may not work the same. Driving some maybe required.

Whatever logic the Toyota engineers applied, maybe to prevent a tire showing high pressure “suddenly” when depressed on a curb or undulating terrain?

 

[shaytun]

Can you explain some more what you did?

Reason I say is that at initial start up I need to drive a bit for the pressure to show up so depending on what you did and in what sequence that can have an impact

With a running engine bleeding down seems to work “live”. Makes sense so you can get warned for a flat tire.

Going back up live may not work the same. Driving some maybe required.

Whatever logic the Toyota engineers applied, maybe to prevent a tire showing high pressure “suddenly” when depressed on a curb or undulating terrain?

That's an interesting point. I used a compressor to inflate. Then went for a drive and noticed pressures weren't being read. I tried multiple times to reset the TPMS both with the engine running and with it off (Start/Stop pressed twice without foot on the brake).

I wonder if it would be better in the future, regardless of what happens this time, to inflate while the car is turned on.

 

[2021 LC200]

That's an interesting point. I used a compressor to inflate. Then went for a drive and noticed pressures weren't being read. I tried multiple times to reset the TPMS both with the engine running and with it off (Start/Stop pressed twice without foot on the brake).

I wonder if it would be better in the future, regardless of what happens this time, to inflate while the car is turned on.

You probably need to drive quite some time like 15 to 30 min

So I would give it some time to show up and not worry about it.

 

[shaytun]

Thanks. I'll try that and will let you know how it goes.

 

[Fisher23]

Thanks. I'll try that and will let you know how it goes.

You need to press the TPMS reset button under the dash.
It is under where the gas door & hood release is.

 

[shaytun]

You need to press the TPMS reset button under the dash.
It is under where the gas door & hood release is.

I did that multiple times until the light flashed. That's what I was referring to earlier.

 

[ToothDr]

If you reset the TPMS you will need to drive the truck at higher speeds for over 30 min I believe. Process and duration is in the owners manual. Mine took a little over 30 min. May take up to 1 hour to reset

 

[BigLexusMN]

@shaytun, did you ever figure this out? I have the same thing. No TPMS light but the pressures don’t show up on the dash screen

 

[pdosescu]

heres my experience with this. I’ve got a 2016 with 135K.

I’ve replaced 2 sensors that were completely dead (battery). Now I’ve got 2 sensors that are reading low battery so I have no tpms light but after about 1-1.5 hours of driving, they don’t ready anymore and then they readout goes to dashes where it usually shows the pressure. I’m replacing the remaining 3 sensors all at once because I suspect 10 year batteries are all dying one after another.

 

[BigLexusMN]

heres my experience with this. I’ve got a 2016 with 135K.

I’ve replaced 2 sensors that were completely dead (battery). Now I’ve got 2 sensors that are reading low battery so I have no tpms light but after about 1-1.5 hours of driving, they don’t ready anymore and then they readout goes to dashes where it usually shows the pressure. I’m replacing the remaining 3 sensors all at once because I suspect 10 year batteries are all dying one after another.

Yah, I have 4 new sensors in mine and no TPMS light. I even used my Autel TS508WF TPMS computer (I maintain a lot of tires & summer/snow swap) to scan all 5 sensors (all have excellent battery life) and re-programmed via OBD-II and still nothing. Even followed the vehicle's relearn procedure by properly inflating all 5 tires, driving it for 15-30 minutes, etc and nothing. Anyone else?

 

[bloc]

Yah, I have 4 new sensors in mine and no TPMS light. I even used my Autel TS508WF TPMS computer (I maintain a lot of tires & summer/snow swap) to scan all 5 sensors (all have excellent battery life) and re-programmed via OBD-II and still nothing. Even followed the vehicle's relearn procedure by properly inflating all 5 tires, driving it for 15-30 minutes, etc and nothing. Anyone else?

What kind of sensors?

The factory/denso/pacific industry sensors must be inflated, deflated back to zero, then reinflated to fully wake from shipping/sleep mode.

I can’t speak for other types.

 

[BigLexusMN]

What kind of sensors?

The factory/denso/pacific industry sensors must be inflated, deflated back to zero, then reinflated to fully wake from shipping/sleep mode.

I can’t speak for other types.

Yes, Pacific ones. So I need to deflate the four tires with the new senors to zero/flat, and then reinflate? Is this what they'd do at the dealership? I've always heard inflating them is what wakes them up?

 

[bloc]

Yes, Pacific ones. So I need to deflate the four tires with the new senors to zero/flat, and then reinflate? Is this what they'd do at the dealership? I've always heard inflating them is what wakes them up?

Yes, to your two questions. Right out of the box there is a red tag on each one that outlines the procedure.

 

[BigLexusMN]

Yes, to your two questions. Right out of the box there is a red tag on each one that outlines the procedure.

Crazy - is this specific to the Land Cruiser? Of all the TPMS sensors I've replaced over the years, I've never seen or heard of this procedure or had any tags in the TPMS boxes. The TPMS light is not on

 

[bloc]

Crazy - is this specific to the Land Cruiser? Of all the TPMS sensors I've replaced over the years, I've never seen or heard of this procedure or had any tags in the TPMS boxes. The TPMS light is not on

Pretty sure they aren’t the same sensors as in Tundras but I do think they are used by other Toyota models. I suspect it could have to do with the country the vehicle is built in.

This image shows the red tag

Edit: I did get a light when this wasn't done, but I'm in a 2013.

If you have access to Techstream you can use the live data function in the TPMS module to see whether the vehicle is getting any data from the sensors.

 

[BigLexusMN]

Pretty sure they aren’t the same sensors as in Tundras but I do think they are used by other Toyota models. I suspect it could have to do with the country the vehicle is built in.

This image shows the red tag

View attachment 4151809

Edit: I did get a light when this wasn't done, but I'm in a 2013.

If you have access to Techstream you can use the live data function in the TPMS module to see whether the vehicle is getting any data from the sensors.

Got it! Thank you, Bloc!

 

[open country]

Great tech in here. I have a 2016 and Discount Tire installed 4 new OEM sensors (I provided from dealer) with my last tire set. I've never had a TPMS light but the sensors show "--" instead of a pressure like OP. Has been over 6 months since, so I don't think it's strictly drive cycle related. I highly doubt they did the inflate/deflate/inflate procedure from the red tag.

Sounds like I need to: deflate to zero and back to desired pressure, hold TPMS button to reset, then drive highway for 30+ minutes?

 

[bloc]

Sounds like I need to: deflate to zero and back to desired pressure, hold TPMS button to reset, then drive highway for 30+ minutes?

Maybe. The outstanding question is whether discount programmed your vehicle for the new IDs.

They are accustomed to using sensors that clone the Tx ID of the original sensors. This means no programming of the vehicle itself. Conversely your new factory sensors have all new IDs that need to be programmed into the vehicle so it knows what to look for.

In my experience bringing in a different type than they are used to can scramble their brains a bit. I provided the IDs of the new sensors but they couldn’t find a way to input those with their programmer.. they could only use that programmer to read what my new sensors were transmitting to then program the car.. trouble was, they didn’t follow the procedure to wake them (and I didn’t know it yet) so they couldn’t read IDs at all.

So.. to your knowledge, did they program the vehicle? If not, and you don’t have the IDs noted anywhere, they may need to be woken up then scanned individually to get the ID for subsequent programming of the vehicle. Alternately they can open the tire and note the IDs from the sensor bodies, but obviously this is much more intrusive.

For the record I keep my sensor IDs in a dedicated page of my maintenance spreadsheet in case they are needed later.

 

[BigLexusMN]

I had Discount Tire install my sensors and new tires and they did program my new sensors into the TPMS computer, and I left with NO light on (I've left Discount Tire before with the TPMS light on and they said it'd go off...it never does). I have the "--" as well for each tire on my dash cluster screen.