Door Locks not working

Tiny
MELTOFF
  • MEMBER
  • 2004 TOYOTA CAMRY
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 93,000 MILES
The door lock button will lock all 4 doors when pushed, but when pushed to open only the drivers door opens. Its the same with the remote. All doors will lock but only the drivers will open. I have changed the locking program to no avail. Occasionally, when driving the car and pushing the unlock button, all the doors will open. But the next time or two you lock the doors, only the drivers door opens automatically.
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Tuesday, July 15th, 2008 AT 9:08 AM

39 Replies

Tiny
KHLOW2008
  • EXPERT
Hi meltoff,

There are three fuses that run the system we need to check but it sounds like the BCM is out but to be sure here is a guide to show you how to check for power and the door lock wiring diagrams so you can see what to test and how the system works along with the fuse locations below.

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

Here is how you change out the BCM is it tests bad. You will need to have it programmed before it gets installed. Check out the diagrams (Below). Please let us know what you find. We are interested to see what it is.

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Tuesday, July 15th, 2008 AT 12:06 PM
Tiny
ZANYJB
  • MEMBER
Thanks for this post I had the same problem and had to get a body ECU cost me $298.00 all fixed! I love this site.
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Monday, August 12th, 2019 AT 5:44 PM
Tiny
HAR
  • MEMBER
  • 2003 TOYOTA CAMRY
  • 1.8L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 14,500 MILES
Hi Team, I am looking for some help. I have the car listed above LE model. When I click lock using remote or driver seat master switch all doors get locked but when I click on unlock they don't unlock. I physically need to get into the car from driver side and unlock all the doors and then all the doors will get opened. I don't have much knowledge but I can learn.
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Thursday, December 17th, 2020 AT 12:11 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

This is likely an issue with the wiring at the body control module. I will try to explain how it works. When you press lock, power flows one direction causing the actuators to react in a specific direction. When you press unlock, power flows in a different direction causing the opposite reaction by the actuator.

Now, if you look at the attached pics, I highlighted the wires that are responsible for unlocking the doors. They go from the switches to the body control module (pic 1). What needs to be done is to first check the connection at the BCM and make sure it is not loose or corroded where the plug attaches to it.

Next, see if there is power being sent to the switch via the wires highlighted. If there is power, then the ground, which has a splice in it, needs checked. Note that the ground is for both lock and unlock, but two wires go to one ground. They are spliced together. There is a chance that the unlock ground has failed but the lock ground is still good. (Pic 2)

I know this sounds confusing, but let me know if you have questions or need help.

Take care,
Joe
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Thursday, December 17th, 2020 AT 12:12 PM (Merged)
Tiny
HAR
  • MEMBER
I still have questions. Appreciate your help.
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Thursday, December 17th, 2020 AT 12:12 PM (Merged)
Tiny
HAR
  • MEMBER
You asked me to check connection. Can you guide where is the connection? I referred to manual but couldn t find it.
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Thursday, December 17th, 2020 AT 12:12 PM (Merged)
Tiny
HAR
  • MEMBER
How to validate the unlock ground is not working?
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Thursday, December 17th, 2020 AT 12:12 PM (Merged)
Tiny
HAR
  • MEMBER
FYI, I checked all the fuses related to car automatic unlock and all looking good. I used test light to validate fuse.
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Thursday, December 17th, 2020 AT 12:12 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

The body control module is located under the dash to the left of the steering column. Take a look at pic 1. Remember, before disconnecting or reconnecting the BCM, you should have the battery disconnected.

As far as testing for ground, simply place your multi meter on the ohms setting. With the battery disconnected, check to see if there is continuity between the black and white wires on the switch and a known good body ground point.

Please feel free to let me know if you have other questions.

Take care,
Joe
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Thursday, December 17th, 2020 AT 12:12 PM (Merged)
Tiny
HAR
  • MEMBER
I removed dash. I have multi-meter. Can you tell me how I need test?
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Thursday, December 17th, 2020 AT 12:12 PM (Merged)
Tiny
NORTON72
  • MEMBER
  • 2003 TOYOTA CAMRY
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 110,000 MILES
Good morning,
The door locks on the driver side both doors do not lock or un lock from either the remote or the interior locking mechanism. I have checked the fuses and they are good. Do you have any suggestions? Also could I take this to an electrician to fix? Or to ring out the lines?
Thanks for all of your help
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Thursday, December 17th, 2020 AT 12:12 PM (Merged)
Tiny
KHLOW2008
  • EXPERT
Hi Norton72,

Symptoms indicates the door lock motor ( actuator ) is malfunctioning and it could be the wirings or the motor itself.

Here are the test you can carry out.

POWER DOOR LOCK MOTOR
1.Remove door panel for access to door lock motor assembly. Disconnect 10-pin electrical harness connector from door lock assembly.

2.Using jumper wires, apply battery voltage and ground to specified terminals on door lock assembly and check that door lock motor moves door lock link to UNLOCK position. Reverse jumper wires so polarity is reversed and check that door lock motor moves door lock link to LOCK position. See Fig. 10 . Replace door lock assembly if operation is not as specified.


https://www.2carpros.com/forum/automotive_pictures/192750_DoorLock03CamryFig10_1.jpg




https://www.2carpros.com/forum/automotive_pictures/192750_DoorLock03CamryFig10a_1.jpg


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Thursday, December 17th, 2020 AT 12:12 PM (Merged)
Tiny
HAR
  • MEMBER
Connection attached.
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Thursday, December 17th, 2020 AT 12:12 PM (Merged)
Tiny
NORTON72
  • MEMBER
Are the two door locks in series or not? If they are in series can the cause be one of the two actuators?
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Thursday, December 17th, 2020 AT 12:12 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

You are simply checking to see if there is continuity to ground via the white wires with a black tracer. Note that the white wires with the black tracers goes between the switch and a body ground. See attached pic.

Joe
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Thursday, December 17th, 2020 AT 12:12 PM (Merged)
Tiny
KHLOW2008
  • EXPERT
All door lock motors are in parallel so if any stops working, it would not affect others.
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Thursday, December 17th, 2020 AT 12:12 PM (Merged)
Tiny
HAR
  • MEMBER
I removed the battery connection. I tested red probe in switch and black to the body of the car but I didn't see any reading in the multi-meter. Do I need to remove the driver seat and check the other end of the wire?
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Thursday, December 17th, 2020 AT 12:12 PM (Merged)
Tiny
DAULUA
  • MEMBER
Hi,
I have the same problem with my 2003 camry, 4cyl. The driver's door locks & unlocks, but the remaining 3 only lock. They will NOT UNLOCK. I tested the 10 pin connection on the pass front door motor, as per your instructions, but mine didn't work the same way. (1 & 4) and (4 & 1) actuated the motor(lock/unlock). None of the others worked. I checked the wiring at the door jam but all looked good. Some other websites think it is in the computer or bdu or edu or whatever Also I've changed that passenger side lock/latch mechanism and that is not the problem as the one I took out worked the same way. Please help as I have had this problem for a number of years.
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Thursday, December 17th, 2020 AT 12:12 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

If you are checking the white/black wire to ground, yes. If there is no continuity to ground, then the ground source needs checked.

Joe
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Thursday, December 17th, 2020 AT 12:12 PM (Merged)
Tiny
KEN
  • ADMIN
Hello,

The BCM runs the door locks and I have seen problems with the BCM in these cars. But to be sure here is a guide to see where you are losing power at.

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

Here are the door lock wiring diagrams see when signal is lost.

Check out the diagrams (Below)

Please let us know what happens.

Cheers, Ken
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Thursday, December 17th, 2020 AT 12:12 PM (Merged)

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