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Old 06-06-2019, 09:48 PM   #1
crashonice10
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Question My Keyless Entry Is Working Intermittently - HELP!

Hey guys, new to this site because I just recently obtained a 2013 Scion FR-S 10 Series.

So a few days after I bought the car, I noticed that if I left the car sitting for a few hours or over night, I was not able to open the car with the key fob or with keyless entry. I had to physically open the door with the key. (Note: Car worked fine the first few days.

The lock/unlock buttons on the door inside of the car wouldn't work either, couldn't put the car into accessory mode but what is weird is that the car starts up just fine when I press the brake and push-to-start.

Now, lets say I drive the car to the commissary or to the gym and come back to the car, everything operates just fine.

Now what I'm thinking is that maybe it's a bad battery? but the dealer says the battery was just replaced 2 months ago and the wiring system was checked 2 months ago just as well. Any reason as to why this is happening?

Some factors that may contribute:
-recently blew one of the 15A 12v cig fuse

-parked the car one day for a few hours with the windows down
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Old 06-06-2019, 10:18 PM   #2
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Change the fob battery first. It's cheap and easy.

Also, try a different area, some neighbors are problematic.
https://jalopnik.com/mans-homemade-e...ods-1834550748
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Old 06-06-2019, 10:49 PM   #3
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Originally Posted by soundman98 View Post
Change the fob battery first. It's cheap and easy.

Also, try a different area, some neighbors are problematic.
https://jalopnik.com/mans-homemade-e...ods-1834550748
I'll try that when I get back from training but I don't think its that cause the key fob works when i come back after a short period of time.

After reading your article though, coud it possibly be an issue that I live on a military base where radio frequencies are constantly being transmitted?
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Old 06-06-2019, 11:23 PM   #4
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I'll try that when I get back from training but I don't think its that cause the key fob works when i come back after a short period of time.

After reading your article though, coud it possibly be an issue that I live on a military base where radio frequencies are constantly being transmitted?
First off, thanks for serving our country -

Second, I doubt that military radio signals are confusing your electronics, unless you are parked beside a commo vehicle.-

Yep, like ol @soundman98 suggests, put a new battery in the FOB. If you have a 2nd FOB, change the battery in that one too and give it a try.

Also, I suggest you check the appropriate fuses, again.


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Old 06-06-2019, 11:59 PM   #5
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First off, thanks for serving our country -

Second, I doubt that military radio signals are confusing your electronics, unless you are parked beside a commo vehicle.-

Yep, like ol @soundman98 suggests, put a new battery in the FOB. If you have a 2nd FOB, change the battery in that one too and give it a try.

Also, I suggest you check the appropriate fuses, again.


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Ill give it a shot once I get back. Thanks yall! & as for my service, thanks for the support bro, I love what I do! Ill give yall a shout back when I get back to let yall know and others who see this post in the future if it works.
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Old 06-07-2019, 02:26 AM   #6
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2016 has same problem

Hi;

First off, on June 6, thank you for your service! Was in the Army back in the 70's & a radio operator. The units we used could make a remote control plane go crazy, but autos didn't have the problem.

Anyway, my 2016 also has the problem you describe & I thought it was because of the temperature. Tried the spare key, the valet key & the same thing. It must be in the head unit of the car. Hoping someone knows a cheap fix.

Enjoy! - Michael
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Old 06-07-2019, 02:47 AM   #7
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Operations specialist here. I park next to an RF hotspot, and it works fine. even my old saab's key fob. phone signal though...

The main issue is when the car sits overnight at the house, it wont recognize the key and goes banana's till i put it in the ignition. Doesnt happened recently but for 3 days straight last week it did it. to the point I had to remove the fuses for the horn so it wouldnt wake up the neighbors as 4 am.
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Old 06-07-2019, 10:43 AM   #8
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[QUOTE=stock 2016;3225370]Hi;

First off, on June 6, thank you for your service! Was in the Army back in the 70's & a radio operator. The units we used could make a remote control plane go crazy, but autos didn't have the problem.

Anyway, my 2016 also has the problem you describe & I thought it was because of the temperature. Tried the spare key, the valet key & the same thing. It must be in the head unit of the car. Hoping someone knows a cheap fix.

Enjoy! - Michael[/QUOTE

What do you think the head unit could be doing to cause the problem?
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Old 06-07-2019, 11:22 AM   #9
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Door lock actuators are known to fail in these cars and it’s a $200 fix.
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Old 06-07-2019, 08:42 PM   #10
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Quote:
Originally Posted by crashonice10 View Post

What do you think the head unit could be doing to cause the problem?
he might be thinking of one of the BCM's. the head unit doesn't have anything to do with any other system in these cars. it's part of why i have one.
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Old 06-07-2019, 08:52 PM   #11
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How much driving does the car get? Newish or not, I'd suspect the car 12v. Though changing fob batteries is always worth a check first. Maybe trips are too short so the battery just isn't being charged fully?
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Old 06-08-2019, 12:07 AM   #12
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How much driving does the car get? Newish or not, I'd suspect the car 12v. Though changing fob batteries is always worth a check first. Maybe trips are too short so the battery just isn't being charged fully?
I took a 3 hour road trip home and then drive it back another 3 hours back to base and it started acting weird the next day
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Old 06-08-2019, 12:08 AM   #13
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he might be thinking of one of the BCM's. the head unit doesn't have anything to do with any other system in these cars. it's part of why i have one.
I havent checked all the fuses but when I get back Im gonna check
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Old 06-08-2019, 12:08 AM   #14
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Had a similar issue. turned out to be both my keyfob batteries and the actual car battery. I couldn't believe the odds...
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