Jump start highlander

You could try disconnecting battery, leaving overnight and then inserting ignition key and switching on before reconnecting the battery.

It has sometimes worked for me but in reality it seems you probably have an alarm immobiliser fault you need specialist help with.

try resetting alarm lower drivers side window and take out keys,disconnect battery and fully charge it , when you reconnect battery alarm will go off ,put key in drivers side door and turn key all the way open and all the locked 3 times then remove key that should reset alarm.

Sounds like a bad battery. If the battery is OK than lock and unlock your Toyota with your fob. If it is still dead than take the better terminal cables off and touch the negative and positive cables together while both are disconnected and away from battery terminals. Should reset your anti theft system. Connect the cables back and try to start. again. If no crank likely bad battery. If battery is OK but no crank then it is the starter.

Immobilizer seems to be active, same with your alarm. May be faulty, need to replace.

It could be the starter, but i would start with having your battery load tested. Sounds like that is the problem. I hope this helps.

Try closing the doors then hook up jumper cables, let it sit for a couple of minutes with cables hooked up and other vehicle running. Then try to use key to turn off alarm before opening door. Then try to start it.

This is a real common problem. You have an alarm, however if it goes off it may keep going untill your battery is dead. No big problem, you just need to either jump your battery with another car or hook up a battery charger to the battery. Easy fix.

is your terminals clean on your battery sometimes a battery is so dead it cant be jumped when you say its not starting again do you mean the truck dosent even turn over when trying to jump or engine turns it just dosent start

Did you check the alternator? if it is faulty the car will drain all the power from the battery until it goes flat

The remote, or u may have a weak battery if not successful