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No TPMS Values (Not even blank values) Displayed

Aggmeister2010

Active Member
Dec 26, 2018
1,172
1,052
TX
Peculiar Issue.

Over the weekend, I swapped my brake pads and rotors. I also removed a broken dash cam and installed a new dash cam (front and rear camera).

When I got back into my car, my TPMS light was blinking, and I didn't get ANY TPMS values. I don't mean they showed the "- -" like it was waiting for values, the whole area was completely blank:

tpms.jpeg


I have no idea what could have caused this to be totally blank, not displaying even the "no value" lines, on all four wheels.

I don't recall unplugging anything on the interior when I installed the dash cam, just ran some wires from front to back over the passenger side roof line, and ran a power down the passenger A pillar, under the center console, and into the USB outlet.

I called Tesla 1-800 support and they had me reboot and change the wheel configuration, no change.

Did I blow a fuse somehow? Did I somehow impact this by replacing pads/rotors? Any other ideas??
 

Aggmeister2010

Active Member
Dec 26, 2018
1,172
1,052
TX
Have you tried unplugging the dashcam? I've heard of some of them interfering with wireless signals. (Especially if a cable was cut and spliced to make installation easier.)

It's not currently plugged in. I was going to run it off one of the two independent USB ports, but it seemed like it wasn't getting enough power from there....it would flicker and cut off. When I powered it through the cigarette lighter, it worked fine.
 

Aggmeister2010

Active Member
Dec 26, 2018
1,172
1,052
TX
Hi folks,

Got my car back from the Service Center and the TPMS values are coming in again, light is no longer flashing.

They stated that Fuse F219 (5A Micro2) controls power to the TPMS ECU (and the glove box light), and that it was blown.

IIRC, my glove box light was working, but perhaps something happened during my V11 update that just needed a hard reset to the TPMS system via Toolbox.

At any rate, if you're not getting any values at all (not even the '--'), it may be because your TPMS ECU is not getting 12V power.
 
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Reactions: brainhouston

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