Seeking advice: Toyota FJCruiser from 2006 starts badly and the lights flicker

Hey, recently had a similar problem with my 2009 Toyota Land Cruiser. Symptoms were quite similar, but in my case it was the faulty ECU, not the battery. After reading the fault memory, it turned out that the control unit was the problem. It was a complicated issue, certainly not something that is easily overlooked, but after a few days in the workshop the problem was solved. Certainly not a walk in the park, but not the end of the world either, that's just the way it is sometimes with older models. Hope that helps you.

(Translated from German)

Moin, interesting that your problem was the control unit! Do you happen to remember what you paid for the repair? And since the garage fixed it, has anything else come up, or is your cruiser running smoothly now? Thanks for your help!

(Translated from German)

Hey, no problem, glad I could help! The repair of the control unit cost me around 600€, so not exactly a bargain, but it was worth it. Since the mechanic fixed it, my Land Cruiser has been running like clockwork. In particular, the issue with the vehicle battery, which was discharging heavily, is no longer an issue. The old darling is doing well again. I hope that reassures you a little!

(Translated from German)

Yes of course, that really reassures me a bit! I think I'll take my FJCruiser to the workshop and have the control unit checked. 600 sounds a lot, but if it solves the starting and lights issue, then it's worth it. Anyway, I'm glad you told me about your experience - it gives me a starting point and a bit of peace of mind. Now I just need to find a good mechatronics engineer... Thank you in any case! You've really helped me.

(Translated from German)