Trunk Won't Open (Non-valet switch problem)
Driver
Joined: Jun 2015
Posts: 108
Likes: 18
From: Illinois
Update - Went to the Lexus dealership, they did the initial diagonosis as something wrong with the electrical, kept the car for another hour and then said they need to order some parts worth $1200 but since its under warranty so I DONT have to pay anything, its all covered.
Yay for Lexus.
Yay for Lexus.
7th Gear
Joined: Mar 2014
Posts: 6
Likes: 0
From: Ca
I tried all these things. No go.
Driver School Candidate
Joined: Mar 2016
Posts: 1
Likes: 0
From: WA
I had the same problem. One morning the dash said the Trunk was open and neither the interior button, the key fob button, or the exterior trunk release button would do anything to open the trunk. The car thought the trunk was already open.
The only method to open the trunk was manually with the hard-key.
I called the dealer and even though they had never heard of this problem before (yeah right!), they said to bring it in and they could figure out what was wrong.
I searched and found this thread instead, and tried all the tricks outlined in here, including pulling the ecu-b fuse. That didn't work. Finally I opted to try pulling the negative battery cable and that did the job.
Thanks everyone - good job helping the community and saving people $$.
The only method to open the trunk was manually with the hard-key.
I called the dealer and even though they had never heard of this problem before (yeah right!), they said to bring it in and they could figure out what was wrong.
I searched and found this thread instead, and tried all the tricks outlined in here, including pulling the ecu-b fuse. That didn't work. Finally I opted to try pulling the negative battery cable and that did the job.
Thanks everyone - good job helping the community and saving people $$.
Driver School Candidate
Joined: Aug 2016
Posts: 4
Likes: 0
From: California
Same problem with my gs 350 2007
tried removing the ecu b fuse it dint work for me
then disconnected the negative terminal of the battery for around 20 mins and when I opened the trunk it did open huuurrraayyy
but sadly it opened only once 😭😭😭😭 and the same problem again
tried removing the ecu b fuse it dint work for me
then disconnected the negative terminal of the battery for around 20 mins and when I opened the trunk it did open huuurrraayyy
but sadly it opened only once 😭😭😭😭 and the same problem again
ClubLexus Stories
Celebrating Lexus & Toyota from Around the Globe
Lexus NX 350h: A Fuel-Sipping Secret Hot Hatch???
Michael S. Palmer
5 Best & 5 Worst Lexus Daily Drivers
Joe Kucinski
Top 5 Hottest Lexus & Toyotas in 2026 (Hardest To Buy)
Brett Foote
2026 Lexus IS 350 F Sport Review: The Last of Its Kind Still Rocks
Michael S. Palmer
Top 10 Most Confusing Things Lexus Has Ever Done!
Joe Kucinski
2026 Lexus ES Review: Lexus Re-Embraces Founding Principles
Michael S. Palmer
10 Lexus Bargains That are Cheaper Than a New Toyota RAV4
Joe Kucinski
8 Weirdest Things Lexus Has Ever Built
Verdad Gallardo
10 Lexus Designs That Have Aged Like Fine Wine
Verdad Gallardo
Driver School Candidate
Joined: Oct 2016
Posts: 5
Likes: 0
From: Florida
Driver School Candidate
Joined: Feb 2016
Posts: 9
Likes: 0
From: Maryland
Worked!
Be sure to turn your vehicle completely off-OFF (close all doors & hit alarm button twice), before re-installing ECU-B fuse. First time I tried the car wasn't all the way off - and it didn't work!
Forget disconnecting battery, too many complications, Find the ECU-B Fuse in the Fuse box under the hood to the left, remove this fuse, start the car, stop the car, replace the fuse, restart the car and the trunk lid will OPEN. Worked for me today just fine on my GS350 same intent as battery without the other consequences, and your battery will stay just like it was...
Rookie
Joined: Mar 2009
Posts: 68
Likes: 0
From: CA
Thank you for this thread
This thread helped me resolve the issue I faced this morning with my '07 GS350. I hit a speed bump, then my trunk popped open, I ran out and closed the trunk and drove away, minutes later my dash said the trunk is still open. I went home and was only able to open the trunk manually. I disconnected the battery for a couple minutes and reconnected, everything works now. Remember to reset your windows as well!
Driver School Candidate
Joined: Nov 2017
Posts: 4
Likes: 0
From: Georgia
I just PM you. tried to fix the trunk problem of my GS300 and found your post. i have exact issue as yours, that trunk only works once. have you solved the problem already? Thank you!
thanks
