2wd-4wd mode change failure

Hmmmm where might someone find this info?

 

Look up FJ transfer case swap.

This thread here first post he goes over what the dealer wants to charge to repaire the rear ADD.

https://www.tacomaworld.com/threads/fj-case-in-a-3rd-gen-tacoma.571689/

 

Remove, clean, and reinstall the electrical connections on the diffs and see if that does anything. That is all I needed to do after some nasty mud crossings.

 

Ta

Thank you

 

The same happened to me. Suddenly got the message pop up. We use 4 Hi regularly. Been following this thread. The mechanic I went to has changed the whole thing. Didn't work. Than started troubleshooting it again, went over every piece, took it apart, cleaned it, went over every wire. Trouble shot by using this forum and others. Nothing fixed it. Now have appointment with dealer. Terrified they will ask 3K to change parts that need not changing. Tempted to find a hammer and tap the black box.

 

Grab the bull by the balls!

 

Update (albeit a little tardy): light tap with a rubber mallet and wood dowel and FIXED.
Has worked flawlessly for the last month or so. I’ll pull and clean in the spring, but for now this was a huge win! Thanks everyone!!!

 

Where exactly on the actual part am I supposed to be tapping? Also, how hard?

 

I used a plastic mallet and a 1/2 stainless rod. Tapped about as hard as I would to counter sink a trim nail.

 

FWIW, I had this error just come up after going a long time without engaging 4WD. The error was present until I restarted the vehicle. I then tried to switch to 4hi and it worked. Sticking actuator likely.

 

Okay so something like this happened to me and I got quoted 3800 bucks from the dealer I actually just unplugged my battery and waited a min then hooked it back up and boom the message went away!! Hope this helps any one save a pretty penny cause it sure saved my self.. reach out if it worked to anyone lol

 

The tap and the video both helpful. Use hi and lo and 2wdlo regularly and occasional engagement failure. Will go under and tap next time. Kudos to TW forums.

 

You’re the real MVP! I was in a tough spot when this failure message came up for the first time. I found a stick, gave the box a few light taps, and it worked perfectly—I was out of there in no time. Thank you!


For anyone tempted to grab a hammer, don’t bother. It doesn’t need much force—just light taps will do the trick, and it only takes a couple of seconds. Give it a try!

 

I’ve replaced my actuator and this is still happening. Anybody know the part number for the harness that goes to the diff and the actuator?