My 2018 lx570 rear liftgate wont open auto matically when i press the key or the button on the inside of car. The only thin i heard was 2 beep sound.
i dont what happen? If anyone has the same problem, please advice me, really appreciate for that .

 

Is the button to deactivate the auto feature disabled? I believe the button is on the right side of the steering wheel

 

Try this

 

when deactivated, u'll hear a beeping sound when u want to open the tailgate electronically. Likely will be the button that is 'off'

 

Might not be the case and may not apply to the 2018 model but on my 2011 you have to unlock the doors first before you can open the liftgate.

 

Two beeps is the normal unlock response which unlocks all 5 doors. What's your owners' manual say about rear door lock/unlock function?