TPMS and larger spare tires (1 Viewer)

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May 29, 2018
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Location
Austin, TX
I was wondering for those that have removed the spare tire from under the rear area, do you have the TPMS light on with the larger spare hanging on the back? Also wondering where the receiver for that sensor is.
 
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I have had my spare removed for 4 days now and no light yet. It is registered as the 5th tire on techstream. I imagine it will pop up at some point.
 
no TPMS lamp on.....

tire shop programmed it in that position..rear carrier

make sense ?
Actually I programmed them using techstream. I think it should give you a warning to let you know your spare tire is flat leaving it useless in that respect.
 
I use my spare tire (on my rear bumper) to pressurize my 5 gal water jerry can.
When the spare gets low on air, my TPMS does come on.
First time it happened, I checked all my tires air pressure and they were all spot on. Couldn't figure out why the light was on. Thought is was a bad sensor.
Then it hit me that my spare was low because we've been recently camping and using the spare tire to pressurize the water jerry can.
Brought the air pressure up in the spare with my handy-dandy ARB compressor and no more TPMS light!
 
I thought I remember some saying they could read PSI with Scangauge.

PSI, Temp can be seen with OBD Fusion/Link. I've had good luck with OBD Link. Quick way to check tire pressure on everything. You can also do a decimal to hex conversion to determine your TPMS IDs.

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I have an old OBDII blue tooth dongle that I used Torque (Torque Android app lets you tap into the brains of your car ) on my old 100 series Landcruiser and was pretty happy with it! Especially when I had an issue with over heating in the middle of know where! I was able to get accurate engine temps to monitor when to stop. Also on the rare occasion when it would throw a code, like when I forgot to put the gas cap on.

So, a couple of questions:
  1. Will one of the above apps will still work with my 10 year old OBDII dongle?
  2. Can I use my stereo Bluetooth for my stereo AND the OBDII at the same time??
The first question I'll probably have to just load the app and find out.
Second question, does anybody know?
 
You are going to need a new OBD dongle with software to read any of the extended Toyota/Lexus codes beyond basic OBD2. Only thing I have found this setup doesn't read is the KDSS ECU.

I can't verify others that work but this one will - OBDLink® MX+ | OBDLink® | OBD Solutions

It may seem spendy up front but they give you all the vehicle add-ons that are $5-10/a piece with the adapter. I won't mention all the other automakers (included) but extended codes on 1996-2020 Lexus/Toyota vehicles are included. Portable Techstream... it doesn't do TS programming though.

Yes on multiple BT. On my iPhone for example... BT to Pedal Commander, 460 stereo, my Apple Watch, as well as the OBDLink MX+ at the same time. Wife tethering via Wifi from Phone as well to her iPad.

You can also save off backups and driving data to a free Dropbox account as well.
 
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Thanks Wiki Man!
 
I keep my spare 20' or so inside my garage and park just outside my garage. My TPMS light only comes on when I turn off the truck and restart it for the 3rd or more time while away from the spare. When I start it every morning, the 25' or so of separation isn't far enough that it can't register the spare for the daily commute, so I can't imagine a well functioning system would have a problem with it on a rear bumper/hatch.
 
I keep my spare 20' or so inside my garage and park just outside my garage. My TPMS light only comes on when I turn off the truck and restart it for the 3rd or more time while away from the spare. When I start it every morning, the 25' or so of separation isn't far enough that it can't register the spare for the daily commute, so I can't imagine a well functioning system would have a problem with it on a rear bumper/hatch.

Is the logic behind driving without a spare that 1) you can perform minor repairs or 2) you'll have to replace the tire anyways for catastrophic failures?
 
Is the logic behind driving without a spare that 1) you can perform minor repairs or 2) you'll have to replace the tire anyways for catastrophic failures?

Currently, I don’t have a way to easily carry my spare. It’s oversized and won’t fit underneath and I use the cargo space too much to store it in there right now.

The thinking is for daily use and around town, I could always repair or find a way to get home if needed. When traveling long distance or off-road, I throw the spare in the back.

Once I find a carrying solution, I plan to carry it all the time.
 

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