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Posted

My neighbour is out at the moment but the alarm of her 2014 RX450h starts sounding for about 1 minute or so and it's done this 4 or 5 times in the last few hours. It is parked on her driveway. Any idea what could be causing this so that I can help her sort it it out? This is the first time it has happened to her car in the 6 years I lived here. Thanks.

Posted

First thoughts are, window open (even slightly)? Or possibly a spider/fly/moth trapped inside? Also might be a slowly retracting seat belt?

My money is on the insect culprit.

More technical causes could be failing siren Battery

 

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Posted

I don't think there is anything you can do about this until she returns.  Perhaps you could have a word with her then and test her 12v Battery voltage.  If she only uses the car infrequently or only for short journeys you could explain need for smart charging or otherwise running car to charge.  An insect could be a possibility.

I recently had alarm activation on my RX450h on two occasions due to hail. I discussed with Lexus Cheltenham and they will make the alarm less sensitive at my request when I am next that way.  It seems they have had to do this for a few owners.

  

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Posted
3 hours ago, NemesisUK said:

More technical causes could be failing siren battery? 

Or a failing 12v Battery as the alarm could detect this as the Battery is being disconnected as an attempt to disable the alarm.

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Posted
8 minutes ago, Stefan213 said:

It happened to me twice, spider and a small fly

Your spider didn't do a very good job in getting rid of the fly did he 😉

 

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Posted
On 10/5/2020 at 3:05 PM, JeffL said:

My neighbour is out at the moment but the alarm of her 2014 RX450h starts sounding for about 1 minute or so and it's done this 4 or 5 times in the last few hours. It is parked on her driveway. Any idea what could be causing this so that I can help her sort it it out? This is the first time it has happened to her car in the 6 years I lived here. Thanks.

flat Battery

Posted

happened to me also.

I went to a local car parts shop,had the Battery checked and was found to be healthy but no charge.

i bought a ctex mxs 5.0 ,connected it directly to the Battery for a few hours and now the car is running perfectly and no alarm during the night.

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