Can car alarm be set off by cell phone?

[DanK]

We have a 2004 Toyota with a factory installed car alarm. The alarm
goes off randomly. Sometimes a few times a day, some days not at all.
No physical disturbance is setting it off (it does it even sitting in
our closed garage). However, we noticed that it seems to happen when
my daughter's cell phone is in the car. I am still trying to confirm
this relationship (by having the phone in there, or not having it in
there, and seeing when the alarm goes off).

Could the cell phone be setting off the alarm? It's nothing obvious,
like the phone being on "vibrate" mode, and receiving a call. Could
the phone be sending a radio signal that is at a frequency that sets
off the alarm (like the frequency of the emergency button on the key
pad)?

We had it at the Toyota dealer, but they didn't find anything (this was
before I made the cellphone connection).

Thanks for any help!

DanK

 

[alarman]

We have a 2004 Toyota with a factory installed car alarm. The alarm
goes off randomly. Sometimes a few times a day, some days not at all.
No physical disturbance is setting it off (it does it even sitting in
our closed garage). However, we noticed that it seems to happen when
my daughter's cell phone is in the car. I am still trying to confirm
this relationship (by having the phone in there, or not having it in
there, and seeing when the alarm goes off).

Could the cell phone be setting off the alarm? It's nothing obvious,
like the phone being on "vibrate" mode, and receiving a call. Could
the phone be sending a radio signal that is at a frequency that sets
off the alarm (like the frequency of the emergency button on the key
pad)?

We had it at the Toyota dealer, but they didn't find anything (this was
before I made the cellphone connection).

Thanks for any help!

When I had a Nextel phone, I remember that it would cause noise on other
devices like computers, radios, etc. This would occur whenever the phone was
in proximity with these devices, and not just when placing or receiving
calls.
js

 

[Crash Gordon]

Anything's possible...especially if the alarm has some kind of sonic device.
Put the cell phone in the car windows up in a garage and call the
cellphone...try different ring tones & volume settings see what happens.

| We have a 2004 Toyota with a factory installed car alarm. The alarm
| goes off randomly. Sometimes a few times a day, some days not at all.
| No physical disturbance is setting it off (it does it even sitting in
| our closed garage). However, we noticed that it seems to happen when
| my daughter's cell phone is in the car. I am still trying to confirm
| this relationship (by having the phone in there, or not having it in
| there, and seeing when the alarm goes off).
|
| Could the cell phone be setting off the alarm? It's nothing obvious,
| like the phone being on "vibrate" mode, and receiving a call. Could
| the phone be sending a radio signal that is at a frequency that sets
| off the alarm (like the frequency of the emergency button on the key
| pad)?
|
| We had it at the Toyota dealer, but they didn't find anything (this was
| before I made the cellphone connection).
|
| Thanks for any help!
|
| DanK
|
|

 

[Tommy]

My current motorola phone also does this when in close proximity to a
radio or computer speaker. My cell holder in the truck is close to the
radio and i always know before i recieve a call even when on vibrate.

 

[PizzaHEMI]

Yest it can......I had an older cell phone that set my alarm off all of the
time....not sure why, but I confirmed it was the problem.

 

[Jim]

We have a 2004 Toyota with a factory installed car alarm. The alarm
goes off randomly. Sometimes a few times a day, some days not at all.
No physical disturbance is setting it off (it does it even sitting in
our closed garage). However, we noticed that it seems to happen when
my daughter's cell phone is in the car. I am still trying to confirm
this relationship (by having the phone in there, or not having it in
there, and seeing when the alarm goes off).

Could the cell phone be setting off the alarm? It's nothing obvious,
like the phone being on "vibrate" mode, and receiving a call. Could
the phone be sending a radio signal that is at a frequency that sets
off the alarm (like the frequency of the emergency button on the key
pad)?

We had it at the Toyota dealer, but they didn't find anything (this was
before I made the cellphone connection).

Thanks for any help!

DanK

Four or five years ago, I had to move a smoke detector out of a
business conference room. Every time someone would use a cell phone in
the room, it would set off the fire alarm.

At my office. When I'm using the office phone (land line) and my office
assistants cell phone is going to get a call ( a few seconds before her
cell phone rings) I hear strong clicking on the desk handset. Seems
like it might be able to cause a problem with a sensitive circuit in a
car alarm.

 

[Nomen Nescio]

Jim said:

Four or five years ago, I had to move a smoke detector out of a
business conference room. Every time someone would use a cell phone in
the room, it would set off the fire alarm.

Did the cell phone set off the smoke detector itself, or did the
interference get into the control panel? Meaning, did the smoke detector's
red LED latch on? What kind of smoke detector or panel was responsible?

- badenov

 

[Jim]

Jim said:


Did the cell phone set off the smoke detector itself, or did the
interference get into the control panel? Meaning, did the smoke detector's
red LED latch on? What kind of smoke detector or panel was responsible?

- badenov

Smoke detector would latch up. Was an older ESL smoke. I don't
remember what revision. Owner didn't want to take a chance by just
replacing with a new unit. I replaced it with a newer unit but out side
and away from the conference room. Never tripped again, but who knows
if it was due to the move or the new unit.

 

[mikey]

And folks walk around with these transmitters nestled up nice and
close to their brains.

Four or five years ago, I had to move a smoke detector out of a
business conference room. Every time someone would use a cell phone in
the room, it would set off the fire alarm.

At my office. When I'm using the office phone (land line) and my office
assistants cell phone is going to get a call ( a few seconds before her
cell phone rings) I hear strong clicking on the desk handset. Seems
like it might be able to cause a problem with a sensitive circuit in a
car alarm.

*** ***

 

[Frank Olson]

And folks walk around with these transmitters nestled up nice and
close to their brains.

I keep switching mine between my two front pants pockets. That way the
radiation expands the balls as symetrically as possible.