Keyless Entry remotes and key fobs (useful range / testing the battery)

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02-03-2015, 03:39 PM
alex16

Keyless Entry remotes and key fobs (useful range / testing the battery)

My fast key sometimes is not recognized if in my left pocket when I get into my Mirage so I figured the battery may be at fault.

Found this testing procedure and did it myself.

"Instructions
1
Turn the multimeter on, and set it to "DC Voltage" mode.

2
Touch the "red probe" on the side of the battery with a "+" sign and the "black probe" to the other side.

3
Read the voltage displayed on the multimeter

Tips & Warnings

The CR2032 is a 3-volt battery. If the measured voltage reads less than 10 percent of the rated voltage, then the battery needs to be replaced. For the CR2032, that voltage would be anything less than 2.7 volts."
-quoted from http://www.ehow.com/how_7287405_test...2-battery.html

They come with a Pannasonic lithium 2032 and mine was at 3.01V still good to go!

Here is some battery removal videos fast key and standard key fob

https://www.youtube.com/watch?v=dpVSKlVuRaI

https://www.youtube.com/watch?v=YBF07xO_lJk
02-03-2015, 04:15 PM
MetroMPG

Did your testing show that your battery was low?
02-03-2015, 05:18 PM
alex16

Well 3.01v is said to be ok but I do believe new 2032 batteries are at about 3.2 volts. I might try a new battery if I keep having this issue with my left coat pocket. The range seems to be great from in my apartment living room I can get a door lock horn chirp, just a bit fussy with the fast key in my left pocket vs the right?
10-09-2023, 02:21 AM
ken2400

I know this is a real old thread BUT I got the yellow key light to turn off after replacing a key fob battery (F.A.S.T) one that was at 2.9 V with one at 3.3 V and the yellow light went out. 2015 ES Mirage about 95 K miles
10-09-2023, 03:21 AM
inuvik

Quote:

Originally Posted by ken2400

I know this is a real old thread BUT I got the yellow key light to turn off after replacing a key fob battery (F.A.S.T) one that was at 2.9 V with one at 3.3 V and the yellow light went out. 2015 ES Mirage about 95 K miles

I just replaced my battery in my F.A.S.T. remote for the second time for my 2015. I'm averaging a little over 4 years before the yellow key light activates.