2017 Tacoma - ECM failure??

[jwheelz]

All - 2017 Tacoma Off-Road - My dash started showing a flashing tire pressure dialogue with each tire good but one shows 0 PSI. Tire is not flat. In to Toyota I go - they think the ECM is bad but that since I have a REDARC battery charger installed, I may have invalidated the warranty. There is a dual-battery system I have installed, very professional, great engineering and nothing ties into the wire harness, just power from Starting battery.
Truck starts fine, no other issues.
Toyota has spent the day documenting the current install and do not think they will pay for ECM. Any thoughts on this? No other symptoms to speak of.

jwheelz @ San Diego

 

[whippersnapper02]

Probably just a bad tire sensor. Mods don't void warranty anyway.

 

[Bojangles]

Probably just a bad tire sensor. Mods don't void warranty anyway.

Agreed on both counts

 

[OR17TRD]

Probably just a bad tire sensor. Mods don't void warranty anyway.

The dealer will say they do like this case and then what? PITA to fight them on it. I’d have them replace the tire sensor under warranty and see if it fixes the issue. Sounds like you need a new dealer.

 

[jwheelz]

Update - On the first day, they discovered they were unable to communicate with the ECM, it was not a sensor. Eventually they determined a loose connector at the tire pressure module on the floor, near the pedals?? No failed ECM after all. They did charge me $135 for the inspection/diagnostics - not covered by warranty. I was told that my installed REDARC and dual battery setup voided the warranty.

 

[whippersnapper02]

I was told that my installed REDARC and dual battery setup voided the warranty.

BS. I'd go to corporate on that.

 

[OR17TRD]

That’s what they do... find any reasons to not pay for it. Stick you with the bill. Some are better at it than others. Good luck at corporate. That’s another S-show.