Hasman69

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.

artboy

Dealer charged me $ 1200 to replace some electro hub. That hurt my wallet.

Im going to have to find a good indie shop here in LA.

soilape

For me it was the valet button. But thanks anyway. These advice led me to the right tracks.

tatumjonj

I just wanted to actually join the forums and say thank you. The ECU-B fuse trick didn't work but removing the negative battery terminal for 15 seconds fixed my trunk. Thank you so much for the help.

2009gs

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 $$.

hiih8er

I'm glad somebody revived this thread. Yesterday I noticed the trunk on mine wouldn't open. I'll give this a try.

singh7

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

singh7

I repeated the same process again and this time also was able to open the trunk only once

deton8

Just had this happen to me. I was all set to disconnect the battery when I figured I'd try the valet button first... That did the trick.

allroad360

This worked, good tip.

Midasking

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!

sanguine

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!

johnnyrock

Hi Singh7,

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!

majorlee

just gotta 2006 GS450h, seriously fun, just had first issue pop up and its this so will give these two ideas a go thanks

guzzy92fs

Happened tth same to me last week, did as the following TSB and works like new again, pretty much reconnecting junction box connectors.