I have a 2001 4Runner 3rd gen. 173,000 miles. All services and maintenance up-to-date. It operates great. After about a week, I started it up on a flat surface, pushed the "4WD" button on the shifter, and then drove slowly forward. As a result, I have the same issue as noted above in this thread above; the "blinking CDL and 4WD" icon light, and then all the others. I looked underneath and found the black rubber hose disconnected from the front center differential actuator housing. Then, I looked closer, and I found a slightly frayed wire on one of the actuator sensor's. I looked over everything and fixed what was needed.
So here is the BEST part of this story! I tried to fix the blinking light issue and I never could find the cause. I had to take into a local Toyota (stealership) Dealer. (Yes, they will try to screw us over every time. It's true.) They're like politicians.
The Toyota Dealer's service department here in Williamsburg, Va. has officially kidnapped my 2001 Toyota for a month now. For a month! All for a blinking light problem.
(I contacted Toyota corporate but I doubt I will get action on a 2001 Toyota. I was even thinking about buying a new Toyota soon. Not now.)
I am a very patient and reasonable person having worked in Emergency Medicine ER's for years which helps to strengthen a person's character to deal calmly with such situations. I am getting close to
Mind you, I can, and did work on my Toyota extensively before taking it into the dealer. When I showed them pictures and videos of what I had all done they didn't care, or listen to me.
They told me initially: 1) We're not sure what it is after having the truck for several weeks. 2) We found "metal shavings" in your transfer case (me: that's weird, as I never had any issues with my gearing or drive-ability) and we'll have to replace it. {I got screwed here! } 3) After the getting a rebuilt transfer case they told me, " still not finding the problem". The mechanic thinks it is the " Skid control module". We're gonna have to find one.
People, friends, this is a legitimate, officially franchised "Toyota" branded "Dealership". WTF. (I will be sending all my photos and recordings to the corporate office when this is over. Yeah, I know. They will file it in the "TRASH" bin file) I will be making an awesome You-Tube video about this debacle!
So, here it is almost one month later to the day. I know we are all in a Covid lock-down but this service by the Toyota dealer here in Williamsburg, Virginia, is so insanely BAD!!! HINT!: They should have named their dealership "Massey's".