This instructable is meant to help you understand the underlying issues with the rear door latch. Please understand that you are responsible if you try to fix your vehicle and screw something up and someone is injured. You should take your vehicle to a serviceman who knows how to fix this problem, has the appropriate training and factory manuals and is insured by the dealer if he screws something up and you or a passenger or some other person get injured. Don't try to blame me if you try to do the repair yourself and somebody gets hurt! This is definitely a safety issue!
Step 1: Introduction
I own a 2003 Sequoia that I bought new. A couple of months ago, I experienced a failure of the drivers side inside door handle. I took it to the Toyota repair shop and it cost almost $300 to fix the cheapo plastic lever that opens a very heavy driver's side door. I was in a hurry and we had company, so I did not have time to try to troubleshoot this problem myself at the time. So, I was at the mercy of the dreaded Toyota Service Department.
I was moderately upset with the $200 in parts and $95 per hour labor fee. This apparently is a very common type of failure on this vehicle and is definitely a safety problem that should be a recall item. When this lever fails, you CANNOT get out of the vehicle on the drivers side. Very dangerous unsafe situation. I'm surprised that Toyota has not issued a recall to replace the poorly designed door handle.
Then without warning, a few days ago, the rear door latch quit working. I could NOT get the rear door latch to engage the "U" shaped connection on top of the rear bumper. Had to drive home with the rear door open, vibrating and clanging up and down with every bump and irregularity in the highway. Choking on exhaust fumes.
Do not waste any time getting this fixed when it happens to you. And don't try to slam the rear door closed or you will break the latch or even bend the "U" shaped thing on the bumper below that engages this latch!
Never sit in the car unless you are moving with all the windows and the moon roof open. Don't drive in this dangerous condition with passengers, especially young children of infants. Carbon monoxide could fill the cabin and you will get a nice long dirt nap.
Turns out that this rear latch failure problem is ALSO a very big problem. Looking in the Sequoia owners forum, there are over 15,500 hits on a topic dealing with inoperable rear door latches on Sequoias. Another good reason for a recall on safety issues if you ask me.
A kid or the groceries could fall out of the back of the vehicle if the door can't be closed. Dangerous as hell. Plus, you cannot turn the alarm on when the rear hatch is not closed. Poor design and very poor materials.
So, it was with some trepidation that I once again drove on over to the Toyota dealer for an estimate. The service guy told me that he never saw one of these latches broken before. In his next breath, he tells me that when the door latch mechanism breaks, you usually have to replace the windshield wiper and rear window opening mechanisms as well... Must have had "STUPID" stamped on my forehead that day.
Sooooo, he just said he never saw one of these break before... but he is sure that I will have to replace everything but the transmission to get my door to work again. The cost would be between $890 and $1150, so much for parts and so much for labor at a whopping $95 per hour.
I don't think so.
Step 2: Stuff You Will Need
Joe is a mechanical guy with a good set of tools. If you decide to try to fix your Sequoia rear door latch in spite of the obvious risks to health and safety, please be careful. You could ruin everything, you could kill yourself. You could maim a curious neighbor kid.
Or, you could be successful in fixing this thing. If you somehow injure yourself or maim the neighbor, it is not my fault. If you have to think to breathe and blink your eyes, then you just may not be a redneck and you should simply go to the dealer and give him all your money.
This just shows how I managed to save a k buck or so without setting my Sequoia on fire or losing any fingers or toes or appendages in the process.
To fix my rear latch, I used the following:
A genuine Crescent Wrench made in Meadville, PA.
Duct Tape for whatever
Metric socket set
Phillips screw driver
needle nose pliers
Flat blade screw driver
Some electricians vinyl tape
Shop rags and paper towels
A pocket or Stanley knife
Eye protection and gloves
Radio tuned in to your favorite polka station
Common sense and good medical insurance if you are a clumsy dope
Don't forget to send the wife with the pooch and kids to a fast food joint for a couple of hours, the language ain't gonna be suitable for mixed audiences!
Step 3: Unplug Connectors
Next. The first problem I noted was that the cheapo plastic outside door handle above the license plate was loose and did not seem to be pulling up the lower latch as it should. You can find a metal replacement for the latch handle on eBay. The dealer tried to sell me another cheap plastic replacement for way more than the metal handle I can buy online. If I had found that the plastic door handle was broken, I would definitely get the metal replacement. I don't want to do any more surgery on the rear door than is necessary in the future.
Next I removed all the decorative plastic panel and trim around the inside of the rear door. I removed the hex head screws holding the stamped black metal plate that goes across the inside of the door carefully. I next removed all the electrical connectors and set the harness aside.
I found that a rubber encased cable (kinda like a brake cable on a bike) was elongated, It raises a lever like assembly on the lower solenoid/latch assembly. If the wire in the cable is elongated, a person will NOT be able to open the door. My cheapo plastic handle was intact, the wire had stretched though. The dealer does NOT sell this item unless you buy the latch handle to go with it. Grrrrrrrrr.
I then listened carefully while pressing the open/close button on the key fob and noticed that the solenoid at the bottom of the door was making a kind of vibrating noise that didn't sound right at all.
Also the part of the latch that opens and closes around the rear door to the lower bumper was stuck completely shut and could not be moved. I could hear the solenoid trying to work, but mostly it made grinding noises.
I started this repair by first removing all the plastic decorative cover panels from the inside of the rear door. I did this with a screw driver and a putty knife slid under the edge of the plastic. Being careful to not scratch up the paint or distort the plastic. It is pretty fragile on the outer edges. Note that if the cheapo plastic snap retainers break, replacements are available at Lowe's in the nuts and bolts department or an auto store if necessary. I was careful and didn't break any.
Next I went to the bottom part of the door and removed the plastic shroud surrounding the lower door latch/solenoid and use a 10mm socket to remove the 10mm hex head screws.
After I got the plastic panels off, I could see some electrical connectors going into a black box on the driver's side of the rear hatch on a black stamped metal cover. I removed the male part of the connectors very carefully. Note: I never pull connectors out by the wires because a person may get their very own personal fireworks display when reconnecting and powering up. I used a flat blade screwdriver to release the connector latches and gently jiggle the male part of the connector from the female base connector.
Step 4: Remove Black Panel
Note: I will found three plastic snap retainers I had to remove to get the stamped metal cover off of the main frame of the rear hatch. I had to be very carefully to tweek the black cover with a putty knife. without breaking any of the plastic retainers. Replacement retainers are available at any auto parts store where they will be a LOT less expesive than at the Toyota parts department. In fact, the cheapest place to buy replacements is the nuts and bolts dept at Lowe's.
I then carefully tied the wire harness out of the way and after removing the black stamped metal cover, put it someplace safe so I don't step on it or lose it or something.
Step 5: Get the Latch Assembly Out of the Door Frame.
I carefully removed the male cable connectors from the latch assembly. I used a small screw driver to loosen the connectors. There are two brass screws on the plastic outer cover surrounding the lower latch assembly. I removed the screws and very carefully jiggled the whole latch assembly out of the plastic housing. I was careful to not bend anything and DID NOT damage the white wire connector.
I am now holding the bare latch assembly.
The image below shows the latch assembly after I cleaned off all the hard dried grease/dirt that was jamming it and making it impossible to use the door handle to open the latch. I used a steamer to blast off all the dirt and caked hard grime. This made it possible to cycle the levers by hand, but the latch itself was stuck solid.
I next looked at the latch assembly which was stuck in the closed position. I sprayed it with WD-40 and then cleaned it with a steam machine several times until the latch assembly was as clean as new. I then was able to move the latch after pressing the open button on the key fob. I then cleaned it again several times in the open position until the water from the steam was coming out clean. I then sprayed it with WD-40 and let it sit over night. Had to eat supper ya know.
The next day, the latch worked good as new. No grinding noises and a very strong metallic click when the latch is cycled open and closed with the key fob. This is good!
Step 7: Fix the Elongated Cable
And for your financial amusement, you cannot buy the cable without the door handle. What a rip!
Soooooo, I had to improvise. I looked over the assembly and decided to bend the tab that supports the cable rubber/metal endpiece.
I simply used a crescent wrench and placed it as shown and bent the tab to take up the slack in the cable. I bent mine about 3/16" as this seemed to be the right amount. If I bent it much more, I won't be able to get the solenoid/latch assembly back into the protective plastic cover and the outside door handle will hardly want to move. I measured two points on the cable and carefully monitored how much I was bending.
The lever system is made of cheapo cadmium plated metal and if you bend or force, something is gonna break!
This would require a trip to the dealer resulting in a big frown on my checking account...
I hate to think how many folks pay big money for replacement parts that probably were completely serviceable but for a little cleaning. If this thing gets stuck again, I would probably first try to just shoot the WD-40 up into the solenoid/latch assembly without taking everything all apart. Wonder if this is a trick that the repair guys know about.
Step 8: Record the Steps in Disassembly...
I made sure that I reconnected all of the electric connectors. Then I carefully cycled the key fob and watch the latch open and close on the solenoid/latch assembly. Note that I had to carefully squeeze the rear door handle to open and close the solenoid/latch. Do NOT close the door until you do all of this or you risk locking the door in the shut position because you forgot to replace something or failed to insert a connector. If this happens, the owner would have to get inside the vehicle and move the cadmium plated levers by hand and hopefully without losing a finger or something, the door will open.
I made sure that the solenoid/latch assembly is in working order before closing the door. I carefully checked all myfingers/toes and major and minor appendages and made sure they are all intact. If not, better call 911 right away.
I then went ahead and closed the door, took a deep breath and locked and opened the door using the key fob. Worked perfectly the first time.
Next look at any parts I might have left over. Important parts will be bigger and probably necessary for optimal operation. There should be NO left over parts when done.
Also, the window and the wiper assemblies worked with no problems.
You didn't take them out by mistake, did you? You just don't listen, to you!
I then replaced the stamped black metal plate and screwed in all the hex head screws and attached the harnesses with red electrical tape to the stamped black metal plate.
I left the outer plastic door panel off for several days just in case something went wrong. Nothing happened, so I reinstalled the plastic panel covering the door.
If I had to do this again, it would probably take no more than 45 minutes; less if I was just gonna swap out with new parts. Two hours labor for this job if done at the dealer is ridiculous if the mechanic remotely knows what he is doing. Somebody might get lucky after a few squirts of WD-40 into the lower hatch assembly and won't have to disassemble anything.
I didn't put any grease or lube in the latching levers or the solenoid/latch assembly. I live in the desert and the dirt that is attracted to grease would probably promote much more wear than if the parts are just left bare. if I lived in an area with a lot of moisture or icy conditions, then I may decide that to apply some lube. Call the dealer and ask them what to use to lube this part (good luck).
Hope this helped save you some time, or at least educated you so that you can discuss the repair with the dealer intelligently.
You can call the wifey and tell her is it OK to bring the kids and the pooch back home.
You worked hard on this; go out and buy yourself something nice with the cash you saved!!!
This is my first instructable, so be kind with comments!