Re: 2005 Sienna XLE Limited: Parking Sensors (sonar) go off while driving
Hello - first time poster here!
My 2004 sienna was having this exact issue. It's my wife's car and she always keeps the sonar/parking assist on all times. She said it was turning off and on randomly. I witnessed it, and noticed when I push the button in and hold it in when driving, it did not have the problem.
So I just told her to drive with her finger on the button the whole time....
Today I removed the DVD unit, then removed the console with the AC display/controls that has the button.
with the console on a table, I removed the four screws and pried open the unit. I then had to disconnect two cable connectors.
Finally, after many screws, and two more cable connectors - I had the electronic board with the switch ready to test.
(Be careful with the connectors, and keep the console face down the whole time or the buttons will fall out!)
So testing the button with my meter (SW501 labeled on the board), with three of six solder points in the back being activated or connected when the button should be 'on' - I can wiggle the button from the other side and get intermittent connection. - this points to the button.
My plan is to buy a new button, but I will have to find it via some electronic supplier like digi-key.
But for now, I just laid solder along the back three connectors (shorting the button on).
SO far, so good after reassembly and test drive. I shot one or two pics during the fix, and it my fix holds - I will post them.
Hope this helps someone.