Hilux difflock 2010 hilux d4d 4x4. the diff-lock don't work when i push the diff-lock switched. i know it only works in low range but there is not even a flashing light. when the ignition is switched on the light do come on for a second or two. tested the actuator and the switches on the gearbox all are fine. i don't get power on the red/black wire at the 4wd ecu and if i give it power the light starts to flash but don't engage.if i unplug the ecu and give the actuator direct power it engage the diff-lock but will disengage it as soon as i plug in the ecu please help

the diff switch, There are a couple of things u can check on the diff (rear) there are pipes (rubber pipes going onto the diff) looks like two ,see if they are not perished and if they are in there is also a switch on the diff (there is on the left hand side if you lay under the back (head first ( to the front))see if it makes contact or maybe pulled out and then there are relays or something in the passenger side.

Replacing the diesel filter - Engines - Fortuner 4x4 Fans

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45 nm second stage 65 nm third stage 85 nm +90 degrees +90 degrees from genuine toyota 3.0 hilux d4d 1kd ft workshop manual

FSM time
ever heard of the FSM. its a magic book that tells you how to do the diagnosis of all parts on car.
get one.
alldata.com is a close subs.

Based on what you wrote about sitting for a week, my first thought is the battery. Does the truck start?

Next, do you get an error code with OBD2? I have a 97 4Runner that had a similar problem shifting into and out of overdrive. It was an electrical relay inside the tranny.

My thought is that if the battery is low perhaps a similar relay is trying to engage or disengage 4x4. Or that relay is just bad.

Could also be the 4X4 switch itself.

there is air in the fuelline,or filter.
try to get the air out

Me also the same problem please help!

Quadratrack transfer units work by way of an internal fluid coupler (same as your mechanical clutch fan but bigger) It is always on but not always engaged. It engages when the rear wheels start to slip.
It should lock in low range though. (in low range you should not drive over 15mph).
if the front wheels won't engage at all, then either there is something wrong inside the transfer case or inside the front differential. Both are usually noisy if they have failed but I've seen some that the ring gear has been removed as well as the driveshaft (sometimes) after the diff has failed, so it can be driven. Find another shop that's more familiar with that unit and have them take a look at it if you don't see anything obvious.

The discovery is as previously mentioned permanent four wheel drive.However the difflock/range lever in most suffers from lack of use and siezes all i had to do when i bought mine was plenty of WD40 and patience as i don't think it had been in low range or difflock from the day it was built.don't try to force it just spray it and let it soak then try keep doing this and it should free up if not it may be the selector grubscrew has worked loose just threadlock it and screw it back in.