I'm a new owner of a 2004 ES 330. The Trunk Button did not seem to work on any of the Key Fobs. Tested Truck Button located to the lower left of Steering Wheel, Truck opened, which told me that the electronic truck latch worked. Tested the Glove Box 'valet' protection for the on/off to the lower left of steering wheel button, this worked as well.
Another Lexus Owner Club member suggested, hold the Key Fob Trunk Button until the truck opened. Excellent advice IT WORKED !!!
I / we kept expecting to push the Key Fob Trunk Button 'quickly' like we did for the door locks, and when that did not work, we assumed somthing was wrong.
Solution: HOLD the Key Fob Trunk Button until the Truck pops open.
