Just got new rims and two of my sensors are not picking up ? are they in wrong? how do they know LF,RF,RR,LR?

Thanks guyz

 

They should automatically pick up the sensor from each corner. If you have two not reading, most likely defective sensors. At only $31 each I just bought new ones to avoid this type of issue.

 

They should all start reading within 10 or so minutes. Give it a couple more miles, since they were working in your stock wheels.

 

Drive the car for a couple of miles and it should pick up each of the four sensors, and then start zeroing in on the air pressure in each tire. If not, then something is either wrong with the TPMS units, or maybe your installer messed up.

There is a July 2008 Acura Service News addressing one part of the installation, although it does not say why it is important to use a torque screwdriver, but there is a reference to the Feb 04 Service News...

Here is an excerpt from the July 08 Service News:

Use Torque Screwdriver to Tighten TPMS Valve Stem
Nuts to Spec
Currently Applies To: ’04–09 MDX, ’07–09 RDX,
’05–09 RL, ’06–09 TL, and ’07–09 TSX

EDITOR’S NOTE: This article replaces “Use Torque
Screwdriver to Tighten Valve Stem Nut” in the
February ’04 issue of ServiceNews.

To properly install a TPMS valve stem, you’ve got to
tighten its mounting nut to spec. And to do that, you
need a precision torque screwdriver that can be set
to 36 lb-in (that’s the torque spec).
If your shop doesn’t already have such a tool, CDI
Torque Products makes one that’s just the ticket. It’s
the Torque Screwdriver (Model No. CDI401SM). This
tool has a unique positive locking adjustment knob
that you can set from 5 to 40 lb-in. To set the torque,
just pull out the adjusting knob to unlock it, turn it to
the setting you want using the easy-to-read window
scale, then push the knob back in until it clicks. The
trilobular grip fits nicely in your hand, and it’s molded
in cool metallic blue. Snap on a 1/4-inch drive
adapter and an 11 mm deep socket (both
commercially available) and you’re good to go.



Going back to the Feb 04 article, it says:
On a ’04 MDX, you must replace the valve stem
nut any time it’s loosened. To do the job right, you
need a precision torque screwdriver that can read
36 lb-in (that’s the torque spec).

So maybe you only have to tighten the nut properly rather than replace it altogether?

 

I just mounted new A-spec rims with 4 brand new sensors. One of them seems to read 4 lbs too low. I carefully checked each tire and inflated them with a digital guage. The other 3 read on, or within a pound of my digital guage. I had these tires road-force balanced so I'm not happy to have to order a new sensor and replace it. That's probably what I'm looking at though.