Key Fob Battery

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Old 07 Sep 2010, 11:11 am   #1 (permalink)
JJG
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Default Key Fob Battery

We have had our 2009 Prius for almost 2 years now and I wonder about the
battery in the key fob. Will I get any 'low battery' warning as it goes
dead?

I know I can unlock the car using the little hidden key but I wonder if I
will be able to start it with a dead fob battery.

What experience is there on this?

Thank you.

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Old 07 Sep 2010, 11:16 am   #2 (permalink)
Michelle Steiner
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Default Re: Key Fob Battery

In article <9PqdnSQ1Drmi-RvRnZ2dnUVZ_judnZ2d@posted.widowmaker>,
"JJG" <XXXXXXXX@widomaker.com> wrote:

> We have had our 2009 Prius for almost 2 years now and I wonder about the
> battery in the key fob. Will I get any 'low battery' warning as it goes
> dead?


Only flakey operations.

> I know I can unlock the car using the little hidden key but I wonder if I
> will be able to start it with a dead fob battery.


Yup, just stick the fob in the slot on the dash.

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Check out the Hot Cocoa Party
<http://www.hotcocoaparty.info>
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Old 07 Sep 2010, 01:19 pm   #3 (permalink)
Michael N. LeVine
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Default Re: Key Fob Battery

In article <9PqdnSQ1Drmi-RvRnZ2dnUVZ_judnZ2d@posted.widowmaker>,
"JJG" <XXXXXXXX@widomaker.com> wrote:

> We have had our 2009 Prius for almost 2 years now and I wonder about the
> battery in the key fob. Will I get any 'low battery' warning as it goes
> dead?
>
> I know I can unlock the car using the little hidden key but I wonder if I
> will be able to start it with a dead fob battery.
>
> What experience is there on this?
>
> Thank you.


I have had my 03 Prius since December of 02 and only had
to replace the battery three months ago. But YMMV.
--
Michael LeVine - mlevine@redshift.com
"Thirty days hath September, April, June and November.
All the rest have thirty one except for Gypsy Rose Lee
and every one knew what she had" - Mel Blanc
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Old 07 Sep 2010, 01:32 pm   #4 (permalink)
Thibaud Taudin Chabot
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Default Re: Key Fob Battery

Op 7-9-2010 18:11, JJG schreef:
> We have had our 2009 Prius for almost 2 years now and I wonder about the
> battery in the key fob. Will I get any 'low battery' warning as it goes
> dead?
>
> I know I can unlock the car using the little hidden key but I wonder if
> I will be able to start it with a dead fob battery.
>
> What experience is there on this?
>
> Thank you.

As far as I know the battery is only for the remote transmitter. The
function to start the engine is a passive device.
Thibaud
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Old 07 Sep 2010, 01:39 pm   #5 (permalink)
Thibaud Taudin Chabot
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Default Re: Key Fob Battery

Op 7-9-2010 20:32, Thibaud Taudin Chabot schreef:
> Op 7-9-2010 18:11, JJG schreef:
>> We have had our 2009 Prius for almost 2 years now and I wonder about the
>> battery in the key fob. Will I get any 'low battery' warning as it goes
>> dead?
>>
>> I know I can unlock the car using the little hidden key but I wonder if
>> I will be able to start it with a dead fob battery.
>>
>> What experience is there on this?
>>
>> Thank you.

> As far as I know the battery is only for the remote transmitter. The
> function to start the engine is a passive device.
> Thibaud

Forgot the little test: remove the battery and try to start the engine.
Thibaud
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Old 07 Sep 2010, 03:26 pm   #6 (permalink)
JJG
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Default Re: Key Fob Battery



"Thibaud Taudin Chabot" <tchabot@dds.nl> wrote in message
news:4c8686d3$0$22938$e4fe514c@news.xs4all.nl...
> Op 7-9-2010 20:32, Thibaud Taudin Chabot schreef:
>> Op 7-9-2010 18:11, JJG schreef:
>>> We have had our 2009 Prius for almost 2 years now and I wonder about the
>>> battery in the key fob. Will I get any 'low battery' warning as it goes
>>> dead?
>>>
>>> I know I can unlock the car using the little hidden key but I wonder if
>>> I will be able to start it with a dead fob battery.
>>>
>>> What experience is there on this?
>>>
>>> Thank you.

>> As far as I know the battery is only for the remote transmitter. The
>> function to start the engine is a passive device.
>> Thibaud

> Forgot the little test: remove the battery and try to start the engine.
> Thibaud


Thanks, Thibaud. Will do that one day when I get my courage up

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Old 07 Sep 2010, 10:11 pm   #7 (permalink)
Daniel who wants to know
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Default Re: Key Fob Battery

"Thibaud Taudin Chabot" <tchabot@dds.nl> wrote in message
news:4c8686d3$0$22938$e4fe514c@news.xs4all.nl...
>> As far as I know the battery is only for the remote transmitter. The
>> function to start the engine is a passive device.
>> Thibaud

> Forgot the little test: remove the battery and try to start the engine.
> Thibaud


For the NHW20 (04-09) the RFID is only passive when the fob is in the slot
in the dash. For smart key equipped cars the RFID is active the rest of the
time. There are at least 4 RFID transmitters on the car. 1 by each front
door, 1 by the hatch (in the rear bumper IIRC) and 1 inside. Each sends a
coded signal to the fob and the fob transmits back which one it "hears" the
strongest to the car (along with its serial number and the rolling code) via
the standard RKE frequency of 312 or 315 MHz (not sure which). The car will
then only allow the proper operation to occur IE if you are standing behind
the car it won't allow either front door to unlock via the touch sensor in
the handle nor will it allow the car to power on, however it will let you
pop the hatch.

For the ZVW30 2010 they got rid of the slot and you "merely" have to hold
the fob up next to the power button to power on the car if the battery is
dead.


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Old 08 Sep 2010, 05:08 am   #8 (permalink)
Elmo P. Shagnasty
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Default Re: Key Fob Battery

In article <9PqdnSQ1Drmi-RvRnZ2dnUVZ_judnZ2d@posted.widowmaker>,
"JJG" <XXXXXXXX@widomaker.com> wrote:

> We have had our 2009 Prius for almost 2 years now and I wonder about the
> battery in the key fob. Will I get any 'low battery' warning as it goes
> dead?
>
> I know I can unlock the car using the little hidden key but I wonder if I
> will be able to start it with a dead fob battery.
>
> What experience is there on this?
>
> Thank you.


Have you read your owner's manual of your shiny $25,000 toy?
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Old 08 Sep 2010, 05:53 am   #9 (permalink)
greenpjs@neo.rr.com
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Default Re: Key Fob Battery

On Wed, 08 Sep 2010 06:08:12 -0400, "Elmo P. Shagnasty"
<elmop@nastydesigns.com> wrote:

>In article <9PqdnSQ1Drmi-RvRnZ2dnUVZ_judnZ2d@posted.widowmaker>,
> "JJG" <XXXXXXXX@widomaker.com> wrote:
>
>> We have had our 2009 Prius for almost 2 years now and I wonder about the
>> battery in the key fob. Will I get any 'low battery' warning as it goes
>> dead?
>>
>> I know I can unlock the car using the little hidden key but I wonder if I
>> will be able to start it with a dead fob battery.
>>
>> What experience is there on this?
>>
>> Thank you.

>
>Have you read your owner's manual of your shiny $25,000 toy?

Give him a break. Afterall, he asked a real Prius question and
received reasonable replies. That doesn't much around here anymore.
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Old 08 Sep 2010, 07:50 am   #10 (permalink)
Elmo P. Shagnasty
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Default Re: Key Fob Battery

In article <8nqe865kbsr6ln1kshecgomj42divs4sbu@4ax.com>,
greenpjs@neo.rr.com wrote:

> >> I know I can unlock the car using the little hidden key but I wonder if I
> >> will be able to start it with a dead fob battery.
> >>
> >> What experience is there on this?
> >>
> >> Thank you.

> >
> >Have you read your owner's manual of your shiny $25,000 toy?

> Give him a break. Afterall, he asked a real Prius question


but an unreasonable question.

"Can someone please read the owner's manual to me while you tuck me in?"
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