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Power door locks not working properly?

Tiny
COLLINS0402
  • MEMBER
  • 2015 HONDA CIVIC
  • 389 MILES
The only thing working on my key fob is the unlock button. And inside the car on both door panels I can’t lock or unlock the car. Also when I put the car in drive my doors won’t lock. So basically I can’t lock my car.
Sunday, August 9th, 2020 AT 6:47 PM

26 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,874 POSTS
Hi,

I looked up the wiring schematic for the power door locks. It is six pages long. LOL There are multiple fuses throughout the system. What I want you to do first, is check fuse 41 in the fuse/relay box under the left side of the dash. That fuse powers all of the relays for the locks. See the attached pics. Pic 2 shows the location. I highlighted the fuse to check. If you are not in the US, I need to know because the locations are different. Also, I am basing this on a 4 door sedan and not a coupe.

Now, in addition to just checking the fuse, I need you to confirm there is power to the fuse. Here is a link that shows you how that is done:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Do this and let me know what you find.

Joe
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Sunday, August 9th, 2020 AT 9:21 PM
Tiny
COLLINS0402
  • MEMBER
  • 2 POSTS
Okay, and if something is wrong does that mean I need to get a new fuse or what I’m taking it to the dealership in the morning. How much does it normally run for this type of fix?
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Sunday, August 9th, 2020 AT 9:33 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,874 POSTS
Hi,

The fuse is something you can do yourself. I suggested starting with that fuse because it powers all of the relays. Since none of them are working, the fuse is the first thing to check simply because all of the relays wouldn't have gone bad at the same time.

A relay isn't expensive at all, but I don't think that is the issue. I have a feeling it's something simple.

If you have a chance, let me know what they tell you.

Take care,
Joe
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Sunday, August 9th, 2020 AT 10:38 PM
Tiny
CRISSY S
  • MEMBER
  • 2 POSTS
  • 2012 HONDA CIVIC
  • 1.8L
  • 4 CYL
  • AUTOMATIC
  • 62,752 MILES
I can lock/ unlock all doors except the driver door with the key button pad. However I can flip the inside lock button on the inside to lock all doors. But I can not use the inside lock all button on the armrest.
Any suggestions?
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Thursday, January 21st, 2021 AT 12:42 PM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
It sounds like the driver door lock/unlock switch is bad since the others work
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Thursday, January 21st, 2021 AT 12:42 PM (Merged)
Tiny
CRISSY S
  • MEMBER
  • 2 POSTS
Thank you
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Thursday, January 21st, 2021 AT 12:42 PM (Merged)
Tiny
SEAN0399
  • MEMBER
  • 8 POSTS
  • 2012 HONDA CIVIC
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 50,000 MILES
Hi on my brothers girlsfriends car all the doors lock except for the front door. You have to manually lock it. What could be the problem and do you have any wiring diagrams. It is a 2012 Honda Civic 4 door. The front door does not lock. Thanks for any help.
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Thursday, January 21st, 2021 AT 12:43 PM (Merged)
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Can you see or hear it try to kick with the power door locks?If could just be a bad door lock actuator.
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Thursday, January 21st, 2021 AT 12:43 PM (Merged)
Tiny
SEAN0399
  • MEMBER
  • 8 POSTS
It was the lock actuator thank you.
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Thursday, January 21st, 2021 AT 12:43 PM (Merged)
Tiny
JASONWHITMIRE
  • MEMBER
  • 3 POSTS
  • 2008 HONDA CIVIC
  • 55,000 MILES
The door locks cycle after every stop. The car initally is suppose to lock the first time I push the gas, but now every time I make a complete stop, and then push the gas, the car lock cycles again. So it keeps making an annoying sound.
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Thursday, January 21st, 2021 AT 12:43 PM (Merged)
Tiny
MOLSONCANADIAN
  • MEMBER
  • 81 POSTS
There must be a wire shorting somewhere near the brake pedal(s).
Check the wiring around your pedals, shake things a bit.
Also try resetting your ECU by disconnecting battery for 10-15 minutes.

Do you have factory alarm or Aftermarket?
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Thursday, January 21st, 2021 AT 12:43 PM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Have the bcm also scanned for any faults.

Roy
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Thursday, January 21st, 2021 AT 12:43 PM (Merged)
Tiny
JASONWHITMIRE
  • MEMBER
  • 3 POSTS
I have the alarm that came with the car, and I had another alarm added to it. Is that the problem?

And what's the BCM?
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Thursday, January 21st, 2021 AT 12:43 PM (Merged)
Tiny
JASONWHITMIRE
  • MEMBER
  • 3 POSTS
I have the factory, and after market alarm. Will that do anything?
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Thursday, January 21st, 2021 AT 12:43 PM (Merged)
Tiny
CITIZENK
  • MEMBER
  • 1 POST
  • 2005 HONDA CIVIC
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 60,000 MILES
Both of the rear door locks are not working. They will unlock lock/unlock when I manually push the individual doors button by hand. They do not work when using the front driverside master locking button and they do not work when using the keyless entry. I have chcked the fuses and they are good. I have little to no experience working on cars and would like to know possible reasons for the door lock failures as well as the difficulty of each possible solution. Thanks!
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Thursday, January 21st, 2021 AT 12:43 PM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Hi citizenk,

It sounds like the drivers multiplex unit is going out but there are three fuses that need to be checked before. Here is a guide to help test the fuses with the fuse locations and the door lock wiring diagrams so you can see how the system works and which fuses to check.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Check out the diagrams (Below). Please let us know what you find. We are interested to see what it is.
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Thursday, January 21st, 2021 AT 12:43 PM (Merged)
Tiny
JESUS CARBAJAL
  • MEMBER
  • 1 POST
I had this problem and had to get a new multiplex unit cost me $240.00 all fixed.
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Thursday, January 21st, 2021 AT 12:43 PM (Merged)
Tiny
METALLIKA
  • MEMBER
  • 1 POST
  • 2005 HONDA CIVIC
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 75,232 MILES
On the driver side of my manual door the key goes all the way in but will not turn. What do I do. On the passenger side the key will not even go in anymore. I tried wd40 and switching worn out key for new one does not work. Can you tell me what might be wrong. They both did this with in 3month of each other.
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Thursday, January 21st, 2021 AT 12:43 PM (Merged)
Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
Thats odd for such low mileage on a Honda. Are these both the original keys? Honda used "sidewinder" keys up to 05, they require a special machine to cut them and from what Im reading you must use Hionda blanks. If they are original, you may just have llock cylinder failures, or possible vandalism. If that is the case, you may need to replace them both
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Thursday, January 21st, 2021 AT 12:43 PM (Merged)
Tiny
JIGGA8517
  • MEMBER
  • 1 POST
  • 2005 HONDA CIVIC
Electrical problem
2005 Honda Civic 4 cyl Automatic 60000 miles

My Driver side door lock is semi-inoperable.

* Using my remote key, does not unlock or lock the driver door. Also, if my driver door is unlocked, the other door locks will lock/unlock. However, when my driver lock is locked, the other door locks do nothing when pressing the lock/unlock buttons on the remote key.

* The driver lock cannot be locked manually by pressing the lock down. The lever just will not go down.

* The driver lock does lock when inserting the key into the key hole. All other locks also lock when locking the driver door like this.
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Thursday, January 21st, 2021 AT 12:44 PM (Merged)

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