Cannot lock any door with key fob or button inside

MIKE HOLDER

MEMBER
2011 KIA SORENTO
2.4L
4 CYL
2WD
AUTOMATIC
175,000 MILES

Alarm will set, but car won't lock. Can lock doors manually. They will unlock, fine with fob or button inside.

Tuesday, August 20th, 2019 AT 5:07 PM

7 Replies

JACOBANDNICKOLAS

MECHANIC
109,724 POSTS

Welcome to 2CarPros.

I suspect the door lock relay has failed. There are two relays. One is for locking and the other for unlocking. They are in the vehicle fuse/relay panel on the left side under the dash. I attached a picture.

What I need you to do is remove the lock relay and switch it with another relay with the same part number to see if it fixes the issue. If there is no other relay with the same number, here is a test you can follow to check the relay:

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Here are a few links you may find helpful:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

https://www.2carpros.com/articles/how-to-use-a-voltmeter

https://www.2carpros.com/articles/how-to-check-wiring

Let me know what you find.

Joe

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Tuesday, August 20th, 2019 AT 6:52 PM

MIKE HOLDER

MEMBER
4 POSTS

It's been awhile, but I finally started looking for the relays. Do I take the fuse panel out, and take it apart? I found a relay under the dash right next to the console that clicks when I unlock. If I unplug it, It don't unlock the doors. I can't find another for locking though. I can hear a faint click when trying to lock them. Thank you very much.

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Monday, September 16th, 2019 AT 5:24 PM

JACOBANDNICKOLAS

MECHANIC
109,724 POSTS

Welcome back:

Don't remove the entire unit. With your hand, see if you can locate where the soft click is coming from. It should be close to the relay you identified. Also, the relay you have identified could control both even though the schematic shows differently. Place your hand on it and see if that is where the softer click is coming from.

Joe

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Monday, September 16th, 2019 AT 6:32 PM

MIKE HOLDER

MEMBER
4 POSTS

When I unplugged it, I could still hear the softer click.

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Monday, September 16th, 2019 AT 6:50 PM

JACOBANDNICKOLAS

MECHANIC
109,724 POSTS

See if you can feel which one is doing it. My manual is extremely vague on its location, but based on the picture it provides, they should be close together.