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Driver Door Lock Actuator Motor Replacement

29K views 19 replies 10 participants last post by  Stuart Binny  
#1 ·
Finally decided to tackle this job after so many years of manually locking my driver side door. I ordered the mabuchi China imitation motor FC-280PC ebay coming from China for $9.30 for 4 motors. Got it in 15 days. From this guy... Round Shaft Auto Motor Car Door Lock Mirror Repair FC280PC FC 280 9mm 8 16V | eBay That's fast. I ordered the same motor from another seller last September for my Odyssey and that guy took a whole month to arrive. But both were very cheap and works great.

Start by removing the driver door panel. Look here if you don't have a service manual.... https://www.youtube.com/watch?v=qM4CooSPoeU&index=5&list=PL381FE485D53A6FAA

Then, you will be removing the window - 2 bolts, lift it out, then remove the metal frame where the window motor is attached. About 10 outer bolts. Disconnect and unclip the harnesses.

Then, you proceed on removing the key lock cylinder/cover and door handle and the bracket its attached to - only 2 star bit bolts - #30 Disconnect the wire that drives the lock to open.

Then, you unfasten the 3 star bit bolts - #30 of the door lock assembly itself - narrow side of door. Disconnect the harness connected to it and you can remove it from the vehicle. Look here for reference, its very similar.....https://www.youtube.com/watch?v=AvUCEjVkF_0&list=PL381FE485D53A6FAA&index=6

This door lock assembly is actually made to be replaced as a whole unit. It is not repair friendly. To open it up to get to the motor (the only bad part of the entire assembly) you have to pry open the case by first picking off 4 plastic screw like head that is keeping it sealed. There are 4 stems with said head. But you only have to pick off the plastic washer like part not the middle which is the stem protruding out. Its easy, its plastic. Tried my best not to break off the thin plastic locking tabs around the casing, but since this is the first time opening this assembly, I basically broke all of it. No biggie..continuing. As I learn how it comes off, you basically have to pry it off up following the 2 cable wire as guide. Use 2 flat head screw drivers but easy on the prying till it comes off. Beside the 4 stems with lock, and the locking tabs, the only thing inside that might give some resistance is the 2 metal lead connection to the motor. Anyway just take it easy, it will come off straight up.


With the assembly now open, pop the old motor (with the metal worm drive) out from its slot. Need to transfer the worm drive to the new motor. I used some heat and it came off just like that. I realized that the original motor comes with a splined shaft. I search everywhere and only found 1 similar but has a weaker rpm-less than half of the new one I got. So I chose the strong motor and decided to just JB WELD the metal worm drive into the shaft. Scoring the shaft with a pliers cutter to give it some bite for the JB WELD. Let it cure for 24 hours before installation.

Place the motor on the other half of the case where the power connects and test it. Plug the harness and turn the switch on in the car. Checking if the polarity of the motor is in synch with the switch. The first batch of motor I got was reversed. It goes lock when unlock. Easy fix was to reverse the polarity of the power leads to the motor. All checked out and put the assembly back together. Now, you have to be a bit creative/macgyver in fastening the assembly shut. I used a wire hanger hooked and wrapped around the top cable guides down to the arm area. On the other side, I found a scrap U shaped aluminum cutting that fitted perfectly on the left side of it -snug fit where the 2 stems are close to each other. I duct tape to avoid noise and movement of the improvised clamps I placed. Sorry no pic. forgot.

Reinstalled everything back to the car and its working great again. Nice loud solid locking sound. Much like the other doors.

One issue I had on reinstallation was the 1 star screw attaching the key cylinder to the bracket. Aiming that screw that is secured in the bracket is all guess work. Since you can't really see the end of the screw and the hole on the cylinder - it was tricky. I finally got it in the end. Best to point it close to the door skin side.

That is it. For $2.50 I got my door lock actuator working again. I still have 3 extra motors should the other fail.
 

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#5 ·
I have replaced driver's door actuator. When I open and close the driver's door with the key in the ignition, the doors lock then unlock every time. Anybody else experience this tor have any suggestions or i should go for Locksmith.
Go for Locksmith this will become major problem in the end. My friend also have some issues like you and he has not chosen any mechanic for this and he has to pay lot in the end. So those issues have been resolved in the start.
 
#4 ·
A door lock actuator is the component in electronic door locks that is responsible for locking and unlocking the vehicle’s doors. When a button is pressed to lock or unlock a door, the door lock switch triggers the actuator.Facing any problem with the door actuator leads to the serious exasperation.In this situation the first option that come in my mind is Locksmith.
 
#9 ·
Power door lock is integral to lock actuator so if remote fails then actuator will also not work completely. At that instant removing it by hiring a locksmith and install the new one is the prominent solution.
For those who aren't able or willing to DIY, yes.

But it's something you can do if you wish, as shown in the original post. Solutions like that are exclusive to owners who are willing to disassemble parts and replace faulty components. That's something that commercial vendors won't do both because of the complexity of the task, and because the labor charges would be excessive. Car dealerships and locksmiths are in the business of replacing parts, not repairing parts.

I recall my Audi 200 which burned out all the lights in the window up/down switches. In one afternoon, I removed all the window switches from the door armrests, disassembled them, replaced the wheat grain lamp in each one, then reassembled the window switches and reinstalled them.

The switches would have cost more than $60 each. The wheat grain bulbs cost me about $2. I spent an afternoon doing the work, but saved at least $238 in cash. Sometimes that's a good idea, sometimes not.
 
#10 ·
OP nitely, works perfectly! Thanks for this.

"some heat"??? If it weren't for getting the worm gear off the old motor, I like your solution for cost and not having to rewire or cut into cables with after market motors.

I did do one thing differently (will post pictures later). After struggling to open the first assembly box and risking breaking it, I took a hack saw down the middle to score the plastic, being careful to not cut the electronic components attached to the backside and then snapped it along that line. Switched the motor. Epoxy on the plastic posts and duct tape over the top to hold it. Works perfectly.

Now on the "some heat" and looking for advice. I had the worm drive red hot and honestly starting to melt. One came off reasonably well. One that won't budge is going in a heavy vice tomorrow with serious heat to see what happens.

And I ruined one because I thought I could hack it off and drill out the motor shaft. Didn't work. So looking for a replacement worm drive I found that they are all slanted the wrong way even on ebay! Went to the RC / hobby store and they have plastic ones all with the wrong slant direct. So one door is likely going to have to be after-market, or I am going to have to order a used assembly from ebay. Or do you have any suggestions on heat?
 
#11 ·
From what I recall, all I did was hold the motor body with a vice and heat up the worm gear with my torch (used for copper pipes). Then I got another pliers just to slide it out. It came off real easy once it was hot. Maybe you bent the shaft on one of them that's why it wont come off?

Not sure where you can find a worm gear replacement though. Maybe that door will just have to be with an aftermarket. I find it hard to find muranos in pick-a-part place.

Good job in opening up the housing a different way. So long you were able to put it back together and shut it tight is the important thing.
 
#13 ·
The mabuchi motors that I got for the murano has the correct polarity. However, on the odyssey, it was reversed. You basically switch the wires that is on the housing. Put the positive wire to the negative end and the negative wire to the positive end. If you find the wires to be short, you can splice in an extra wire to reach the ends.
 
#14 ·
You can also flip the motor if the other side also has lead connections. If not, do the wire switch. You can even cut the wire somewhere in the line and splice it with the other. So you don't have to add wire.

Can't remember if the wires has extra slack but point is you want to switch the 2 wires going to the motor ends. Find the easiest way to accomplish that.
 
#16 ·
Don't mess with the harness connection. I believe there is a small chip that controls the rest of the doors somewhere inside the assembly. You want to make sure you cross only the 2 wires coming from the motor leads. The 2 thin metal blade that gets inserted to the motor. Only the wires soldered at the other end of these blades should be cut and crossed nothing else. If you can see/find the solder points maybe you can just remove the solder and cross the wire from there and solder it back.
 
#19 ·
Locked in the Murano—driver’s side

Hi all,

Recently purchased a 2003 Murano, 166 K, love it—mostly. The driver’s window (and passenger’s window) had issues; wouldn’t roll down completely. Had been avoiding rolling it down the last few days, then then coffee called, I accidentally rolled it down, window drops into the door, won’t go back up. So, had a friend pull the panel.

We were unsuccessful in getting the right glue to get the window glued back into the clips, so it goes into the shop on Tuesday. Put everything back together just fine, thinking I’ll have no issues driving it around today. I get in this morning, and instantly get locked into the car. Can’t roll the window down to get out unless I want it to stay down (rained last night, so, not really). Can’t unlock it manually—the electronic lock is stuck in locked. Called a friend to let me out. I suspect we put something together backwards? Ideas? Many thanks.
 
#20 ·
Alright, so using a physical key to unlock the door isn’t the end of the world, but it is a slight hassle if you’re used to the convenience of electric locks. When a door ceases to lock and unlock at the press of a button, it often means that the door’s lock actuator has given up the ghost.With the door lock actuator removed from the secondary panel and placed on the bench, it’s time to dig into why this component has ceased to function.