Hello everyone I really need help on this please... 2009 GS350
I reset (via techstream) my car immobilizer due to all key lost situation... All reset process was perfect but at the moment to register a new smart key code fob, I had a car battery issue and was not able to add that key. I disconnected the battery to recharge and then I put it back later to continue the process, but this time the dash is not coming on, when I push the start button nothing happens, only the door light is on on the dash but nothing else. I attempted to reset the immobilizer again but keeps failing after reset code is entered. The security light keeps flashing all the time... I disconnected all horns. No idea what else to do in this case... I have been searching online but nothing to solve this issue. Thanks for your help!

 

I wish I can help you but I dont have experience with techstream and keying process. You can call a mobile key shop in your area, they usually can reprogram it for you, depending if the new key fobs part numbers are correct for your car. Im assuming it would be a lot cheaper then towing it to the dealer.

 

Take it to the dealer. If the battery dies while your doing anything in techstream you can brick your ECU. Don't mess around just pay the money to correct your mistake.