The infamous 4wd dash light flashing... (1 Viewer)

[splitshot]

I hit a wash faster that I should have a week ago last Friday in the 4runner and shortly after felt the need to activate the 4wd button on the shift lever.
Ended up with flashing lights ever since.
Today I had time to check the fuse, the button on the shift lever and continuity on both the position switches on the transfer case actuator. I am still getting the familiar
"Lockup click" on the front differential...
Also did some research and found the 3rd gen (2001) is almost identical to the Sequoia and found this informative video;



I need to dedicate next weekend into diving into this further. Suspect the transfer actuator is locked at one end or the other (I am not hearing anything from it).
Usual. Time is valuable and any .02 would be greatly appreciated.

 

[JunkCrzr89]

Which lights are flashing? The green wheel lights? Is the center orange light for the center diff solid or flashing?

In addition to the position switch on the actuator, there should be 2-3 more position switches on the sides of the t-case, up near where the shifter goes in. There’s also a position switch on the actuator at the front diff, which, from my experience, is 75% of the time the culprit of flashing 4wd lights on 2000-2002 3rd gens. The other 25% of the time it’s the electronic actuator at the back of the t-case, which can often be resolved with a few love taps from a hammer.

 

[toy_tek]

Had a t case actuator locked up on my brothers tundra, just loosened the actuator mounting bolts a bit and hit the switch and it released - never was an issue after that.

 

[splitshot]

Which lights are flashing? The green wheel lights? Is the center orange light for the center diff solid or flashing?

In addition to the position switch on the actuator, there should be 2-3 more position switches on the sides of the t-case, up near where the shifter goes in. There’s also a position switch on the actuator at the front diff, which, from my experience, is 75% of the time the culprit of flashing 4wd lights on 2000-2002 3rd gens. The other 25% of the time it’s the electronic actuator at the back of the t-case, which can often be resolved with a few love taps from a hammer.

All five are flashing. Like I said sounds like the front diff actuator is still working.

 

[splitshot]

Question. The hose that goes to the transfer actuator, is that vacuum or just a vent?
Been surfing the FSM but haven't found it yet.

found it's a vent

 

[splitshot]

Either the front A.D.D. diff actuator or the actuator on the case. After research, seems like the 4wd ecu goes into a
default after 3 seconds which immobilizes the system. Sound correct?
Trying to plug any play each with someone's help inside the truck yields no results.

Next step is to pop out a relay and build a bunch of jumper wires. What a PITA.

 

[Living in the Past]

Either the front A.D.D. diff actuator or the actuator on the case. After research, seems like the 4wd ecu goes into a
default after 3 seconds which immobilizes the system. Sound correct?
Trying to plug any play each with someone's help inside the truck yields no results.

Next step is to pop out a relay and build a bunch of jumper wires. What a PITA.

View attachment 2735756View attachment 2735758

There is advantage to the old FJ40 Land Cruiser. In the early sixties the factory supplied tool kit would get you home for most things that when wrong. The electrical manual for new vehicles is larger that the complete FSM on the FJ40. For certain things simple is better.

 

[splitshot]

There is advantage to the old FJ40 Land Cruiser. In the early sixties the factory supplied tool kit would get you home for most things that when wrong. The electrical manual for new vehicles is larger that the complete FSM on the FJ40. For certain things simple is better.

Miss the gold old days when one cold buy an inexpensive locking hub conversion kit (think Milemarker sold them). I remember doing a few
of those on friends full 4wheel drive Chevy's.
And if I could just install an early j-shift transfer case.....
With the Trac control, and the ABS, think that is a can of worms I do not want to open.

 

[Living in the Past]

Miss the gold old days when one cold buy an inexpensive locking hub conversion kit (think Milemarker sold them). I remember doing a few
of those on friends full 4wheel drive Chevy's.
And if I could just install an early j-shift transfer case.....
With the Trac control, and the ABS, think that is a can of worms I do not want to open.

Not sure what you are calling the J shift transfer case. My 99 3rd gen had a manual shift transfer case. All 4th gen were electronic. 5th gen on the TRD and possibly the trail edition transfer is a manual shift like my 99. My wife's 04 is full time 4WD. That is an advantage driving on slick pavement. After rolling a 2000 4WD Tundra that offered no traction assistance we bought the 04. Part time 4WD are designed to only use 4WD when there is some wheel spin allowed. If I had even a limited slip in the Tundra probably would have been fine. Our 5th gen has traction and stability control and better weight distribution than a empty pickup but would still choose the 04 full time 4WD over part time for icy roads.