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2003 Corolla Door Lock Problem


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#1 franklin pug

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Posted 15 July 2006 - 09:02 PM

One of my door cellenoids went and it is totally screwing up my auto lock system. The keyless remote and door button will only lock and unlock the rear drivers side door.

anyone have a similiar experience or know what gives or how to fix it?

#2 the99contour

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Posted 16 July 2006 - 12:03 AM

Spelled Solenoid for future reference. Also, the door locking mechanism isn't a solenoid anyway, it is an actuator. I don't think that your actuators are bad if only one door is operating correctly. I would guess that the wiring to the power lock switch has gotten messed up or a relay or something is broken. The keyless entry simply taps into this wiring to lock and unlock the doors, so it probably isn't the problem either.

I'm sorry about the tech stuff, but it will help you to describe the problem better. Please post back giving us a description of the problem that is as exact as possible. What are the locks doing, are any unusual sounds being made, when did this first occur, did you do any wiring work before this happened?

BTW, for other's benefit, this is for a 2003 Corolla. Isn't stated in the body of the post, but is contained in the title.

Edited by the99contour, 16 July 2006 - 12:10 AM.

#3 Bodhisattva

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Posted 17 July 2006 - 09:10 PM

It's doable, esp. if you have small hands and lots of patience. I changed one in wifey's '98 LE last year, part was about $150 US. The only way to fix it is to replace the actuator. Pay particular attention to the fitment and order of the bits you remove and make sure they all go back EXACTLY as you disassembled them and you won't have to do it twice. Buy a new pack of retainers for the door liner, you will enevitably break at least one of them when you remove the interior panel. My $0.02

#4 franklin pug

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Posted 18 July 2006 - 11:08 AM

Yes, this is a 2003 Corolla CE which I bought off the lot in May of 2002.

When i attempt to lock the door either with the remote or with the door side button, three of the locks simply won't respond. The rear driver's side door will lock/unlock as it normally did when the car was new. Upon pushing the button, the doors make a "mechanical" sound, as if they are trying to lock but do not. The locks (or rather the button that actually moves) does not even budge.

I have had this problem for about a year. I have not attempted to wire anything myself, not have I had anyone attempt to do so. The wiring is the same as it was the day I bought it. I have had a dealership look at the door, and they told me it was likely a "hotspot" in a solenoid of any of the 4 doors. It would cost about 200 dollars for a part and then the labour to locate the bad part and replace it. It would likely be a 1000 dollar repair.

The strange thing is that it started off as only the passenger's side front door lock not working. Then it moved from there to the driver's side only. Then it would not lock any doors, and now the read side driver's door works. Bizarre. If i manually lock all of the doors, the remote will confirm if they are locked or not by flashing the lights of the car, but it will not engage or disengange 3 of the door locks.

Originally. when only the passenger's door lock would not work, slamming the door sometimes helped for a few days.

It is very frustrating - thanks for the help

#5 the99contour

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Posted 18 July 2006 - 11:16 AM

Yes, this is a 2003 Corolla CE which I bought off the lot in May of 2002.

When i attempt to lock the door either with the remote or with the door side button, three of the locks simply won't respond. The rear driver's side door will lock/unlock as it normally did when the car was new. Upon pushing the button, the doors make a "mechanical" sound, as if they are trying to lock but do not. The locks (or rather the button that actually moves) does not even budge.

I have had this problem for about a year. I have not attempted to wire anything myself, not have I had anyone attempt to do so. The wiring is the same as it was the day I bought it. I have had a dealership look at the door, and they told me it was likely a "hotspot" in a solenoid of any of the 4 doors. It would cost about 200 dollars for a part and then the labour to locate the bad part and replace it. It would likely be a 1000 dollar repair.

The strange thing is that it started off as only the passenger's side front door lock not working. Then it moved from there to the driver's side only. Then it would not lock any doors, and now the read side driver's door works. Bizarre. If i manually lock all of the doors, the remote will confirm if they are locked or not by flashing the lights of the car, but it will not engage or disengange 3 of the door locks.

Originally. when only the passenger's door lock would not work, slamming the door sometimes helped for a few days.

It is very frustrating - thanks for the help


On most newer cars there is a module or relay that controls the power door locks. I'm guessing this module is bad in your car since the syptoms moved from one door to another and then to 3 of the 4 doors. Since the wiring hasn't been changed at all and the problem moved around I'd say the wiring isn't a strong possibility. I don't know where the power door lock control module or relay is, but someone on here should be able to point you to its location. Once you find this module you can inspect it for proper operation.

Just a quick question. When you bought this car it had a 3 year 36,000 mile warranty. Why didn't you get this problem fixed while the car was under warranty? Did the dealer know the problem existed while the car was under warranty and refuse to look at it or fix it?

#6 franklin pug

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Posted 18 July 2006 - 03:06 PM

i drove out my warranty before the problem occured. i tried to get them to fix it anyways, but it was like trying to get blood from a stone.

thanks for your help

#7 franklin pug

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Posted 18 July 2006 - 03:10 PM

I got some help regarding my power door locks and it may be the module or relay. can anyine point me to it?

#8 Bikeman982

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Posted 19 July 2006 - 12:04 AM

i drove out my warranty before the problem occured. i tried to get them to fix it anyways, but it was like trying to get blood from a stone.

thanks for your help


I hate it when that happens.

#9 Bikeman982

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Posted 19 July 2006 - 12:05 AM

I got some help regarding my power door locks and it may be the module or relay. can anyine point me to it?

Do you have a wiring schematic or repair manual for your model?

#10 NILLINOIS

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Posted 19 July 2006 - 12:40 AM

My Haynes doesn't cover the latest generation and it's damn near impossible to find the EWD's online.

Sometime in the 90's Toyota switch from Single relays to Integration Relays. These magical voo-doo boxes have circuit-controller based relays. Damn expensive to buy, almost impossible to debug for us mere mortals.

In 2003 Model, PDL/Unlock are the BLUE/WHITE & BLUE wires (-12V) in driver's kick panel going into the white plug. Perhaps trace the wires to the integration relay?

http://i74.photobuck...OROLLA-LOCK.jpg

My Haynes for 8th Gen shows them feeding into an Integration Relay. May be the same for 9th, maybe not.
Some IR's are behind the instrument cluster.

Here's the WD for 8th Gen ( may or may not be same/similar) :

http://i74.photobuck.../doorlockwd.jpg

Just out of curiousity, What are you trying to accomplish?

Edited by NILLINOIS, 19 July 2006 - 01:07 AM.

#11 NILLINOIS

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Posted 19 July 2006 - 01:20 AM

Hmm..you created a new post from this thread?

http://www.corolland...showtopic=19224

Spreading the same problem across 2 topics = bad

Is this remote a Toyo factory installed one or aftermarket? Usually aftermarket installed ones cause problems down the road....

#12 Max

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Posted 19 July 2006 - 07:02 AM

Why was a second thread on this topic created?

#13 franklin pug

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Posted 19 July 2006 - 09:00 AM

My Haynes doesn't cover the latest generation and it's damn near impossible to find the EWD's online.

Sometime in the 90's Toyota switch from Single relays to Integration Relays. These magical voo-doo boxes have circuit-controller based relays. Damn expensive to buy, almost impossible to debug for us mere mortals.

In 2003 Model, PDL/Unlock are the BLUE/WHITE & BLUE wires (-12V) in driver's kick panel going into the white plug. Perhaps trace the wires to the integration relay?

http://i74.photobuck...OROLLA-LOCK.jpg

My Haynes for 8th Gen shows them feeding into an Integration Relay. May be the same for 9th, maybe not.
Some IR's are behind the instrument cluster.

Here's the WD for 8th Gen ( may or may not be same/similar) :

http://i74.photobuck.../doorlockwd.jpg

Just out of curiousity, What are you trying to accomplish?

My auto door locks are on the fritz. See my previous post "2003 Corolla Door Selenoid"


#14 franklin pug

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Posted 20 July 2006 - 07:52 AM

Its the original door locks, no after market stuff.

I created a second thread because i thought that it would be easier for people to spot the problem by the title/message heading.

#15 Bikeman982

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Posted 20 July 2006 - 11:22 PM

Sometimes posts tend to divert off on tangential or different subjects and a new post with the desired topic is preferable to one that has digressed.

Edited by Bikeman982, 20 July 2006 - 11:24 PM.