Lexus GS Terminal 15 Ignition Error

Ugh, electrical gremlins are the worst! Had a similar issue with my old Saab 9-3 – different car, I know, but hear me out. 'Terminal 15' sounds like an ignition switch problem, right? But did you check the starter solenoid? Is it even getting power? 'Cause on my Saab, a corroded connector on the power supply was mimicking a bad ignition switch. Drove me nuts!

Corroded connector, eh? Interesting. I was leaning toward the ignition switch. But you think that could actually cause a hard no-start situation? Where exactly was this connector located on your Saab? Maybe the Lexus has a similar setup.

Yeah, complete no-start! Drove me bonkers for a week. On the Saab, it was near the firewall, tucked away where all the wires converge. Seriously, trace the main power cable from the battery. But honestly, with a Lexus, especially a hybrid, the wiring can be a nightmare. Might be worth biting the bullet and having a workshop take a look.

You were spot on! Turns out it was a corroded plug connection on the component. Wiring harness was fine, thankfully. 95€ later, and she's purring like a kitten again. Thanks for the nudge in the right direction!