G37S TPMS nightmare

[telcoman]

My two week nightmare with my Tire Pressure Monitor Sensors is finally over.

This issue began two weeks ago on the first morning driving to work in the pouring rain, sleet and snow with a I Phone 4S just being activated from my old 2G Blackberry. That was a Tuesday. Tire pressure was checked and all four wheels were above 32 lbs. Air was later added to all four tires to 35lbs and the warning light went on and off the rest of the week.
A trip to the dealer resulted in the replacement of two rear wheel sensors that were not communicating.
Driving home after about 15 miles the Tire Pressure Warning light came on again.

Drove back to the dealer and they replaced the antenna module located behind the glove box.

Began driving home and the warning light again came on at the exact same spot as I passed a cell tower.
Again turned around and returned to the Infiniti dealer where they gave me a loaner.

They updated some software into my vehicle but the tire pressue warning light issue continued with three different 2012 G37loaner vehicles including an EX35.

Infiniti tier 2 support thought it might be EZ Pass related so I requested a replacement EZ Pass and even drove one day without the EZ Pass thru the toll booths on both the Garden State Parkway and the New Jersey Turnpike.

The tire pressure warning light continued to come on with no EZ Pass and the I Phone turned off.
I finally sent an email and described my issue to to the President of AT&T Network Operations. The following day I received an email from Executive Escalations containing this link

http://www.crvownersclub.com/forums/14- ... -3g-2.html

When I got into my G37S yesterday to drive home from work before I started the vehicle I removed the I Phone charger from the 12v power socket.

The tire pressure warning light began flashing and then went out.

After driving a few miles I pushed the charger back in to the 12v power outlet.

At milepost 151 on the Garden State Parkway near the AT&T Cell Tower the tire pressure warning light began to flash. I immediately pulled it out and the warning light again stopped flashing and went out.
After a few more miles I pushed it back in and again near another cell tower it began to flash. Again I pulled it out and the warning light went out.
This repeated four times on my way home and each time by removing the charger from the power outlet the warning light goes out.

It appears the very first instance of the tire pressure warning light turning on prior to the purchase of the charger was vehicle related and Infiniti replaced the two rear wheel sensors and the antenna module under warranty.
The car charger emitting RF interference in the UHF range (315Mz) that is used by the wheel sensors to communicate to the ECU thru the antenna module just added to the difficulty of troubleshooting.
I hope this post helps anyone else having strange tire pressure monitor issues.

Telcoman

[joe603]

very weird...

[telcoman]

very weird...

Yes Joe it was very weird but the issue can also be caused by other chargers for portable navigation, radar detectors or other after market devices with power adapter chargers that cause RF interference in the UHF frequency range preventing the wheel sensors to communicate with the vehicle antenna module and ECU.
I found out this did not only affect Infiniti but other makes and models as well.

Telcoman

[audtatious]

Interesting. I have a el-cheapo charger and have had no issues in either G at this point.

Way to figure out a problem too....

[kmckis1029]

i'm not surprised. i've noted this in replacement laptop chargers also... they will cause the mouse pad to not funtion correctly while charging. It really doesnt have anything to do with being cheaply priced or not, just that some chargers obvioulsy are not following FCC rules. its reads something to the effect, "device must accept all interferance, but emit no interferance."

ive had "expensive" chargers cause interferance while the "cheap" one functions fine.