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post #1 of 28 (permalink) Old 06-16-2017, 04:45 PM Thread Starter
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TPMS on spare

Did anybody's spare come with TPMS or have you added TPMS?

I got my used TH rim to put on the spare so I can do 5-wheel rotation. The tire shop said that since the spare didn't come with a TPMS sensor, that it wouldn't be able to recognize it if it was added.

Anybody know the specific of if/how this will/won't work?

The wheel wasn't pristine, but it was in really good condition. I probably have some similar scuffing on the original wheels.

Now I need to find a center cap...

Thanks!
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post #2 of 28 (permalink) Old 06-16-2017, 04:57 PM Thread Starter
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According to this thread, it looks like I can just add a sensor and have it work once it's in an active position?
No TPMS on spare tire/wheel

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post #3 of 28 (permalink) Old 06-16-2017, 05:36 PM
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only question would be, will the car "see" the fifth sensor in the trunk and get confused, or possibly misrepresent the tire pressure. the sensors themselves are very inexpensive in these cars, less than $20 last i checked.

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post #4 of 28 (permalink) Old 06-16-2017, 05:42 PM Thread Starter
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Quote:
Originally Posted by IRSmart View Post
only question would be, will the car "see" the fifth sensor in the trunk and get confused, or possibly misrepresent the tire pressure. the sensors themselves are very inexpensive in these cars, less than $20 last i checked.
I thought the tire had to be rotating before the TPMS sensor itself would activate. Then it's the closest sensor/close-enough that gets read.
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post #5 of 28 (permalink) Old 06-16-2017, 06:22 PM
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Quote:
Originally Posted by Rojhan View Post
I thought the tire had to be rotating before the TPMS sensor itself would activate. Then it's the closest sensor/close-enough that gets read.
you mean the sensors inside the tires need to be rotating? no, or else the readings wouldn't change when you're stationary and airing back up.

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post #6 of 28 (permalink) Old 06-16-2017, 09:19 PM
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I thought it took a while for the new pressure to hit the EVIC for the exact reason that it had to run a bit?

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post #7 of 28 (permalink) Old 06-16-2017, 09:29 PM Thread Starter
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It looks like the TPMS sensors can be tickled awake by the car meaning they are probably asleep when the ignition is off.

Tomorrow is scheduled maintenance. I'll ask about it.

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post #8 of 28 (permalink) Old 06-16-2017, 09:52 PM
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Quote:
Originally Posted by Rojhan View Post
.... The tire shop said that since the spare didn't come with a TPMS sensor, that it wouldn't be able to recognize it if it was added. Anybody know the specific of if/how this will/won't work?
Thought I remembered reading this in the user's manual (This is for the 'Premium 'TPMS system):

Vehicles With Matching Full-Size Spare
1. The matching full size spare wheel and tire assembly
has a tire pressure monitoring sensor that can be
monitored by the TPMS.

2. If you install the full size spare in place of a road tire
that has a pressure below the low-pressure warning
limit, a chime will sound and the “TPMS Telltale
Light” will turn on upon the next ignition key cycle. In
addition, the EVIC/DID will display a Tire Low
message, an #Inflate to XX# message and a graphic
showing the low tire pressure value in a different
color.
3. After driving the vehicle for up to 20 minutes above
15.5 mph (25 km/h)
the “TPMS Telltale Light” will
turn OFF, as long as no tire pressure is below the
low-pressure warning limit in any of the four active
road tires.
4. The EVIC/DID will display a graphic showing the tire
pressure value in the same color as the other pressure
values in place of the different color low tire pressure
value. The EVIC/DID will also display a “SPARE
LOW PRESSURE” message to remind you to service
the flat tire
.

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post #9 of 28 (permalink) Old 06-16-2017, 11:56 PM
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That is incorrect, the spare has no TPMS sensor of any kind.
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post #10 of 28 (permalink) Old 06-17-2017, 04:42 AM
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i don't think it would read the 5th one in the trunk because when i got a flat and used my spare it did not read the tire with the TPMS sensor it just showed 3 and said the one was missing
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