sequoia 4wd troubleshooting
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- เผยแพร่เมื่อ 7 ก.ย. 2024
- This video will walk you through everything you need to know in order to troubleshoot the 4wd system on the Sequoia. it covers theory of operation, parts location, and tips and tricks that I have compiled from many hours of study and troubleshooting. this can save you thousands of dollars vs. having the dealer repair your 4wd.
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I read where a TH-camr said to take a small hammer and tap the switch...lightly.
BINGO...IT WORKED.
Thank you very much for your info...glad it was a simple fix.
DREADED THE THOUGHT OF TAKING HER TO THE STEALERSHIP!!
I just did the same thing on mine: light taps on both switch housings with a small hammer. I also noticed the vacuum hose on the transfer case was cracked so I trimmed it back and reinstalled it as well.
I think I'll make sure I go in and out of 4WD once a month to keep it from seizing up again (hopefully).
Super helpful video!! Mine (just got it 3 days ago!) was stuck in 4x4, the front switch on the transfer case actuator was bad. I took it out and it had no continuity with plunger in or out.
To confirm, I turned the key on (motor off) and all 4 wheels were green, with a blinking orange center. So I pressed the 4x4 button, and all 4 green wheels lights turned off, but the orange center light was still blinking (this was the main symptom).
So then I unplugged the bad sensor, and used an unpainted metal paperclip bent into a "U" as a jumper, plugged it into the bad sensor's plug, (again, key on, motor off, green wheel lights off) and everything clicked and disengaged! Woo hoo!!! So relieved!!
Just need to replace the sensor now, but thanks for the great video!! Wouldn't have tried this without your explanation!
So awesome. you're describing my exact problem- were you ever able to replace the switches, and if so, where did you get them?
Yep, got it switched out. Still have a problem up front, 4X4 won't engage fully and honestly haven't had a chance to climb under and smack it. It's new to me, and the previous owner never exercised it. Oddly, the bad switch worked again after having it out and pushing on it a lot, but I wouldn't comfortably rely on it. If you're in a pinch, take the switch out and push the plunger in and out, and see if you get any continuity from the switch.
I replaced the bad switch with this: Toyota 84210-52050 Back Up Lamp Switch from Amazon. Worked like a charm, not stuck in 4x4 anymore and we've been driving around ever since. I just need to get the front dif resolved. I'm sure it will be easy, I just need to get after it.
Man you saved me a grand++ I'm sure. I found 2 (yes two) faulty plunger switches that I didn't even know about. One was 200-300 ohms, the other was wide open. That cost me $275 at the dealer. My back diff lock was ok after pulling it out and cleaning it but the front (ADD) 2x 4x shifter was afu. I finally got it working and now everything is DNO. Just tapping on the front ADD got it to cycle. I know how everything works now and exercised it multiple times in some deep snow on the mountain yesterday. Thanks for taking the time to make this video.
I know you don't have the car anymore but you'll be great help you went through it and you got it done the right way
Thanks for this video. I was able to determine an issue with my ADD as I was unable to manually rotate it but I was able to manually rotate the transfer case back to 2 high. I had read in my owners manual when I got my 2003 sequoia in 2016 and had ran the 4wd monthly. In fact that's how I found out this problem. I wish the ADD was a bit more accessible. Thanks again for the information!
I know this was forever ago, but.... how did you manually change the transfer case back to 2wd? My front drive shaft is stuck engaged in my 2003. Thanks!
EXCELLENT Video!!! It really helped me understand the Toyota 4WD system, and components, and how to TS my Sequoia's problem. Just about everything that COULD be wrong, was wrong, including both transfer case switches. THANKS for making this!!
I had this exact same issue. My 03 sequoia got stuck in 4WD locked diff. Center diff light flashing. I tested both transfer case postion switches and found the front one to be bad. After replacing it I disconnected the battery for about 15 minutes and then reconnected it. I started it and the blinking light went away. I would start with the position switches if you’re having similar issues. The part was $61 with tax.
Thanks for the excellent video--your instructions on how to manually rotate the two actuators through their various positions is extremely helpful. I am working on a 2001 Sequoia. I was able to cycle both the transfer case and the ADD through all of their positions manually. I did not note any hesitation in the operation of the motors. Several times I tried rotating both actuators to the 2wd/free positions and starting the vehicle. The flashing orange diff light disappears until I attempt to engage 4wd with the button, after which I hear an engagement noise. However, the flashing orange diff light will now come on and stay on until I manually rotate the transfer case from 4wd-Locked back to 2wd. The ADD appears to stay in the free position. I have checked both transfer case position switches and replaced the front one, which looked like it was not achieving full continuity, with no result.
I have read that the wheel speed sensors provide information to the 4wd ECU. A couple of months ago, I experienced the issue common to these trucks where the ABS/traction control system randomly locks up one wheel at speed, so I tore out the ABS fuse. The 4wd system has been non-operational since long before the ABS issue became serious. Is it possible that these two issues are interrelated, and that my manual cycling of the actuators and replacement of the position switch are not fixing the problem because of a sensor elsewhere in the system? I suppose I could check the L4 and Neutral switches. Is there a test procedure for those? Or is it only the vehicle speed sensor that has input to the 4wd ECU? I suppose it's possible that my ECU is bad.
Is there anything else to check before I dive into the 4wd ECU?
Thanks.
The gift that keeps on giving... Merry Christmas!
Great and helpful video, I thank you sir, I was able to fix my 2002 sequoia with the same problem.
Great detail talking about the transfer case turning out of four-wheel drive it would have been best to display the area from the vehicle thank you for the video it was very helpful
Fantastic video! Very Helpful
Thanks for taking the time to do a great video like this
You are very knowledgeable
DUDE..... THIS WAS A GREAT VIDEO
Great video. Saved me a lot of time of having to go through it myself. All said and done, my ADD motor was toast on my 2003 Sequoia. In my case, the actuator breathing tube had snap off. I had never realized it had a breather until now. Years of corrosion from road salt and a few flooded streets, did the motor in. $470 after taxes in the Chicago area. I could have bought one a lot cheaper online but this issue was discovered less than a day before a trip to CO.
Thank you for the video. It's a bit confusing, but I think you did the best you could to make sense of it all, and it's helped me understand the system way better.
Seems like the switches are the easiest to start testing. My problem on my '04 is the center diff and it's intermittent, so I have some work ahead of me. Once I got mine unstuck once before, it's worked fine ( did this by tapping on it). After driving a couple thousand miles, it stuck again when I engaged it and won't respond, just blinking on the dash.
Do you have a link to the service manual you used for this? I would like a copy for myself. Thanks and great video. Going to try this this week/weekend.
Wish there was a troubleshooting guide like this for Tundra 2008-2014... pin out on front diff seems similar, it would seem though I have no position switches on transfer case act. Great video.
The diagram he shows at 12:20, the rotary joints on mine were dirty and I cleaned them with fine steel wool. I took a photo before I removed the gear for correct positioning. It took me an hour to remove and replace.
Hi can you send me a pic of the nuertral pos of the pins with the cover off . Thanks
A real good video for sure. We have a Tacoma 2001 that is a huge headache. With the 2 front wheels off the ground, pushing the 2-4 selector does absolutely nothing...no light, no 4x4 engagement. You can spin front driveshaft and if you turn a wheel by hand only one wheel spins. If I disconnect the ADD connector at actuator and then push the 2-4 selector button you hear the transfer case motor spin and the front driveshaft locks. In addition, both front wheels now spin (opposite directions). What the heck is up with that? lol
Hi. In your video you have a sheet that has two pictures of the ADD actuator wiring layout, and both of them are complete opposites of each other. Can you explain them? One has the number one pin being on the right and one has the number one pin being on the left
It's cool that you're helping with diagnosing but showing what you're talkin about is a lot better than explaining
Thanks for the video very helpful. I have a 02 sequoia. I have center light blinking problem. If I am at fwd mode i tap the rear actuator case with a hammer and it goes away. If i am at 4wd mode then i need to tap front and rear actuators. It is not very practical but I thought if I do this enough times maybe it will be exercised and dont need do it anymore but still flashing center light if i press 4wd button. Anyone has any idea what could be the problem or fix?
I just did the same thing on mine: light taps on both switch housings with a small hammer. I also noticed the vacuum hose on the transfer case was cracked so I trimmed it back and reinstalled it as well.
I think I'll make sure I go in and out of 4WD once a month to keep it from seizing up again (hopefully).
Thanks. Really needed to watch this!!!
Great video. I have flashing light w/4 green tires every time i start my 03 sequoia. I can push the 4wd button and the green tires go away but light still flashes. I had to replace one of the position switches at the transfer case actuator. Didn't fix the issue. So I want to spin the actuator manually just a little confused with the pin orientation and I don't want to damage the transfer case actuator. I don't hear either actuator spin and it won't engage 4x4H but I can get it to go into 4x4L .
So I got the pin configuration figured out now. I have continuity at pins 4&6. So thats High 4 lock. So connected my wires like in the video and got the actuator to spin from 4HLock to H4 so I turned the key to on position and I heard the actuator spin the orange light and the 4 green never left. I checked the continuity and is was back to 4H lock so I wired it to spin to 2wd and it did spin and once again when I turned the key to on position actuator spinned right back to 4H lock again. Can the front add be causing this? I previously have stated it does ingage into 4x4L but not 4x4H.
I've got all 4 lights and center flashing. I see you checked both positions in the actuator, I'm looking to check mine for continuity but having hard time getting them out. What size socket or wrench is that to get them out and how's your vehicle doing now?
For my 2003 Sequoia, the only way I can get INTO 4WD is to shift into N and use the lever that switches between 4L/4H. I leave it in 4H in general. I shift into N and then put the lever into 4L and then shift into 4H and that gets me into 4WD. I use the button to DE-activate 4WD, but it WILL NOT WORK to get me INTO 4WD. I hope this helps someone!
I replaced a bad plunger switch. I also replaced my rear actuator because it was badly corroded.
I was still unable to get into 4WD and I was looking at the front actuator. I took it off and was looking at it. It appeared to be in like-new condition, no corrosion or anything. I opened the motor portion and it fell apart and I couldn't get it back together, so I bought a new one from China.
Transfer Case Actuator is 1476.00 at the dealer. Found one on Ebay 1184.00
Mla Automotive mine was $207 at advanced auto
Mine was $207 from advanced auto
I fixed mine and saved $1100 on a the part for an 05 Tundra,. Take the black plastic cover off, remove the assy and clean the motor contacts on the lid with fine steel wool. Reassembly is a little more tedious, but I did it in less than an hour.
Would this work for my situation?
Car wash guy accidentally pressed the 4wd button while cleaning interior. Blinking orange light came on and hasn’t come off. ?
Hey man you have the best video and all of youtube about that actuator. But I am in a tough situation to 2001 Sequoia same actuator problem but the motor brushes were stuck .the transfer case is on my bench cuz I'm doing transmission one time I pulled the cover with the worm gear and the whole assembly came off meaning I am not synchronize now how can I synchronize it back. 3 pins the right position of the cover on 2-wheel drive
i have an issue with mine....last owner told me that i have to put 12v on 2 point in the plug behind the radio console to make the fork of the 4wd engaged...do you have some info about that?? it's like i have to jump the connector directly to fully engage or disengage the 4wd...i have to invert the 12v power on the same spot to make it disengaged....but i don't remember the exact pin to jump the that plug....can you help me on that one dude?
Help! Does the vehicle need to be fully in the air to do this? Mine is currently on the ground. Tcase actuator is good by bench testing it and confirming the motor spins both ways and both tcase switches referenced have continuity. I'm 90% sure the issue is the ADD. I'm flashing, and vehicle acts like 3/4 wheels are locked, or maybe all 4. Can I do the manual rotation of the front diff as described here on the ground, or does it need to be in the air and in gear or neutral?
Thanks!
Thank you. Again, so if I unplug the battery, can I unplug the actuator and the front plugs to check for dirt?
Thanks for the video! Can you tell me what it means if there’s is continuity between pin 1 & 2 on the transfer case motor.
I’m stuck in 4WD Locked. Position switches are working.
@smashsackett if you're still around, where can I get access to this manual? Very hard to find.. Thanks for the great video.
Question, I'm in an 03 Sequoia am I looking at an expensive fix or what? My center differential light flashes. I have never been off-road. I took it to toyota they actual road tested it with me in it. The codes that were listed are C1203,C1223, C1247, C1360, I called a private 4x4 toyota specialist and he said to check the plugs in the actuator. So if its just faulty plugs is it expensive? Should l get rid of the car? Thanks for the camera work, THAT WAS HUGE I got under there and saw everything.
best video ever
When I tested my 4wd switches for continuity I got a bunch of numbers jumping around when I pressed the plunger (maintaining even pressure) and then after 3 seconds or so it zeroed out. This was with alligator clips btw.
Is a normal reading test these 2 switches on a Tundra?
how the red light on the miniature goes off ... the red dot inside the four wheels on the dash
Great video. Any chance you have put those documents in a .pdf that you could email out? I realize this video is 8 years old at this point, so I'm reaching for sure.
Mr Gible> where do I obtain the layout sheet your using from toyota?
I have 2002 sequoia with all these same issues>
great stuff by the way.
Thanks
good video but the easiest way to do it is removing the diff. and trans. case actuator clean them up i am sure most of the time is the problem
So my02 4runner having similar issue. When trying to engage 4wd 4h I get the green wheels and center diff flashing and it never engages unless I turn vehicle off then back on the it will be in 4wd with center diff locked at that point I have to press the center diff button to disengage it. Do you think I have the same issue. Thanks
Where can i get copies of those sheets?
What happens is only the green lights of four tires are on?
Totally worked!!
can you put up park # up for the parts to change out
If you hate yourself and think that you need to be punished, then by all means make your own cables to connect to the 6 pins of the 2 actuators. Otherwise, just buy some alligator clips. My self-made leads fell off time after time wasting so much time and money on this project. "Why isn't this moving the motor!?" Well, because the connectors fell off of the pins. Or they detached from the end-connector, etc.
nice work
Thank you so much!
I have a question, on my 2001 Sequoia awd, sometimes those lights (VSC OFF )and (VSC TRAC ) they both sometimes come together ON,
is that a big problem ?
How do I turn them off ?
But that is just sometimes,
Fabian Silva did you figure it out?
Where can person get the manual for that
What's the rubber holes are for on it
I have a question if that sensor is messed up will the vehicle not move at all eventhough its in gear?
hey man, great in-depth video! my 02 sequoia has the red diff light flashing on the dash consistently. the two switches are good, but my diff actuator has continuity at pins 4-6 So it's stuck in locked 4wd? so I need to replace that actuator?
not necessarily, if you manually rotate it using the procedure described in the video it will likely start to work again.
@@smashsackett if you're still around, where can I get access to this manual? Very hard to find.. Thanks for the great video.
Is it possible just to buy the two switches?
Is the front ADD actuator a hose a Vacuum hose?
If you didn't get an answer it should be just a vent.
When you check your position switch, What was your ohms reading?
+Mr. Gible I was just checking for continuity so I don't know, I didn't pay attentions to the actual resistance value, sorry.
smashsackett alright. Thanks.
1999. Toyota. 4runer. Tranfercaec. Troubleshooting
great video very informative where your lock button is mine has a vsc button is that the same?
I don't know for sure, that is for the vehicle skid control. I think it probably does the same thing because when I push mine a light on the dash comes on that says "vsc off". You could check by getting it into 4wd, park it, then press that button and listen, if you hear the transfer case actuator motor run then I would say it is the same thing because it is shifting the transfer case into the locked position. but that's just a guess? sorry I can't help more for sure on this.
smashsackett having trouble with the transfer case motor am going to use much of your information to get it out of 4wd the front motor works after I reset by disconnecting battery terminal for a few hours I still have to check the switches and may get gutsy and pull the transfer case motor. I like that you dont have to pull everything apart to change the motor. Ill have to see if i can get it seperate from the rod if I need one.
thanks again
Brad Goodrich so the jumpers and battery work perfectly (once i got my pins numbered correctly) tested the two switches on the transfer case motor the appear to be ok tho i get different readings on each one they cut off the current when not engaged. Now when i plug in the two plugs the front goes back into 4wd. for now I have the plugs undone and taped the ends and sockets any idea what would cause the front motor to engage when vehicle is started?
Brad Goodrich So if I understand you correctly you can get the transfer case motor to run using the battery and jumpers, if so this is good. Also you need to verify the readings of the actuator at each position. 4H, 4L, and 2wd. using the continuity tester, and same for the front actuator, in free and lock position.
What happens when you push your 4wd button?
Is the diff lock light currently flashing?
Brad Goodrich I have the same issue going on right now with my 2007. The front ADD puts it in 4wd and will not go back. Did you fix yours? What did you find out?
My 2007 tocoma goes into four wheel drive,but to get it out I have to shut off the truck. Also when it's in 4 wheel drive the light flashes,any ideas. Thanks
Actuators LOVE to be rotated. I'm not really into that. To each his/her own.....
Why is my light staying on
2003 sequia Avoid all this , first put it in 4x4 while moving forward for about 20 to 30 ft if it doesn't go into 4x4 then while rolling forward put it in neutral, then repeat backwards to go back to high two wheel drive , thats how I do it evertime
just to save on the where and tear anyway .
This didn't work for me. I do agree that doing this when the system is working would help reduce wear and tear though (good best practice).
What did work was light taps on both switch housings with a small hammer. I also noticed the vacuum hose on the transfer case was cracked so I trimmed it back and reinstalled it as well.
I think I'll make sure I also go in and out of 4WD once a month to keep it from seizing up again (hopefully).
I got a diagnostic on my sequoia and the dealer said it had low ohms. Something like 0.001 ohms when it needs 0.5 ohms. What should i do.
I replaced everything and light still blinks I'm having trouble putting it in sequence . so if the front is locked the read has to be in 4h or 4h lock ?
Rear*
+Dylan i Yes, it does.
+smashsackett ok so what if I took the cap off the t-case actuator and the gear came out too how do I align that to the correct position before I re-install the cap.
Can you do a video on how to set the teeth on the actuator gear and motor? I took that apart and I need to line up the teeth. Having a tough time figuring it out. Thank you!
Any help?
Hi I saw the video great job . I have a 2001 Sequoia limited with a 4 wheel drive button and the shift lever . but I am on the same situation I disassemble my motor on the actuator it was stuck the broches of the motor wore stuck I fix the motor it's working fine but as I disassemble and assemble because my transfer case is on my bench the whole mechanism and the gears came off so I need to align the teeth back on in 2hi. So by moving the whole gear sets all the way clockwise to the end meaning the input shaft is out of the transfer case I need to align the teeth do the three pin of the cover your instructions are clear but where are the three pins should be .?? How did you figure out yours be grateful for your help
When I took the cap off the gear came out how do I align it to the right position on the transfer case actuator ? So the motor spins it to the right position
+Dylan i This is tricky! I probably will not be able to explain it very well but essentially using the diagram that I made in the video starting at about 12:20 you can get that gear put back on the correct tooth. When you rotate that gear you will be driving a rod in the transfer case from front to back. you will need to grab the gear and manually spin it all the way from one direction to the other, clockwise and counter-clockwise. I can't remember which way does which but all the way in one direction will put you in H4wd and all the way in the other direction will put you in 2wd. so pick one of these directions, spin it all the way (you may need to rotate your front driveline a little so the gears in the transfer case will mesh) once you have it completely rotated ( I would use the 2wd direction) then using the diagram on that yellow piece of paper in the video, just make sure that when the cap is screwed back on the fingers on the back of the gear will line up where they are supposed to be, use the bolt holes to orient the fingers. You will need to pull the gear out and reinsert it on different teeth in order to get it to the proper rotational orientation. Sorry I diddn't make a video of this but once I got mine back in and the cap siliconed back on I didn't want to disassemble it again, now I have since totaled that sequoia and got an 05, and the 05 uses a completely different setup.
hope this helps
@@smashsackett will be going through this bit shortly. @DI AUTO did you ever get yours back together?
How to change from 2H to 4H and 4H to 2H
Thanks for help me
Sorry, actually my request is directed to smashsackett?
our 4wd center light is flashing red, what does that mean?!
I don't understand what exactly you did to actually fix yours. this was just you testing it
There can be a number of issues preventing proper function of your 4WD and he does a pretty good job running through most of the common issues and how to effectively troubleshoot.
Bro can I just take my sequoia to you yo fix it!! This is to much for me
Wow why is this system such a piece of poo?