As in the topic, Ive had to change my battery in my 99 mk2 GS300, I had to do this before but I cannot remember what needed to be done. I found a post by Maneesh that said to put key and turn one click and leave for 6 mins then remove key and that should do it. but Ive tried that twice now and it's not working.
Is there any other method or some other step?

I remember having to do something like this last time I changed the battery but I cannot remember what lol

thanks and merry xmas to all

I think you turn it 2 clicks Brett,

Thanks Paul
it is indeed 2 clicks
I even posted this info myself back in may 2005 lol
2005 Post by me!!!

Oh well all working now

Happy Xmas everyone

No worries dude

That's weird - I just changed the battery in my GS430 Mk II, and didn't have to do anything at all. Just pulled the old one out and put the new one in, did up the terminals, and she started straight away.

I knew the radio didn't need a code as I'd already taken it out previously to fit a car kit, but it never occured to me that the alarm/immobiliser might need attention!!

I wonder if they have different immobilisers fitted?

It might depend on the amount of time, I had to take mine out and take it back to Halfords for an exchange. so it was out for about 30 mins or so.