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Keys not being recognised

wowens

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will
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Hi all,
I've parked my mkV 2019 the other day and 5 minutes later when I came out of the shops, the key simply stopped working.
Replaced both keys batteries several times, but still nothing.
Unlocked the door manually, alarm going off, held key to steering column, it won't register the key.
Held keys to start button, but still won't register keys. Won't start.
Disconnected the battery overnight.
Still no change.
Changed the car battery.
Still no change.
Checked all fuses in all three (3) fuse panels. All were fine.

Any ideas???
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lucky phil

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Maybe a Supra GTS 2023 MT, Kia Stonic GT, Mazda CX5 GT SP
OBD dongle installed?
Phil
 

MrNobody

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Make sure you dont have anything sitting over the subwoofers or overtop between the subwoofers. Had a similar problem when I took cans to the dump once.
 
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wowens

wowens

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Make sure you dont have anything sitting over the subwoofers or overtop between the subwoofers. Had a similar problem when I took cans to the dump once.
Nothing there but a yoga mat.
 

Vt-mech

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23 my Supra 3.0 premium
Hi all,
I've parked my mkV 2019 the other day and 5 minutes later when I came out of the shops, the key simply stopped working.
Replaced both keys batteries several times, but still nothing.
Unlocked the door manually, alarm going off, held key to steering column, it won't register the key.
Held keys to start button, but still won't register keys. Won't start.
Disconnected the battery overnight.
Still no change.
Changed the car battery.
Still no change.
Checked all fuses in all three (3) fuse panels. All were fine.

Any ideas???
Get new fob batteries. One of mine was dead within a month after new ownership.
 

NocturnalEmber

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Hi all,
I've parked my mkV 2019 the other day and 5 minutes later when I came out of the shops, the key simply stopped working.
Replaced both keys batteries several times, but still nothing.
Unlocked the door manually, alarm going off, held key to steering column, it won't register the key.
Held keys to start button, but still won't register keys. Won't start.
Disconnected the battery overnight.
Still no change.
Changed the car battery.
Still no change.
Checked all fuses in all three (3) fuse panels. All were fine.

Any ideas???

I'm going to put my money on bad batteries. I've had it happen a few times for various reasons, including on push to start cars I've owned. Get a known battery brand from a reputable supplier. Anything amazon special could likely lead to exactly what you are describing. If you got a poor batch of batteries it would lend credibility to the key fob battery issue.

Edit: make sure you are putting the batteries in correctly. This may seem like common sense, but sometimes people don't pay attention.
 

fantastical

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2024 Supra 45th Anniversary; 2026 Supra Final Edition
Interested in knowing what this ultimately was diagnosed as and fix.
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