Help! Key Keeps Losing Its Programme

[hodaz]

Yesterday the key lost its programme, so i reporgrammed as per the guide in the sticky section.

However today it has lost its setting again, so reporgrammed again, and then after i left gym (so within couple of hours) it had lost its programme again, and when i opened the door off the key the alarm went off.

All I can think that has changed recently is I replaced the Battery in the key, but this was over 2 weeks ago and the problem only started yesterday. Any have any idea's what could be wrong?

Oh and btw this is all using the master key, the spare key is loosing its settings too.

[hodaz]

after a search i'm guesssing its the alarm sensor? :(

[hodaz]

i think this may now be sorted :)

i found the guide that is stickied inaccurate.

however this one is correct for my car (1999 IS200 SE Navy)

http://www.lexusownersclub.co.uk/forum/ind...hl=program++key

the part that is missed out from the stickied guide is the bit about if you havent done the correct sequence car will lock and ucnlock TWICE, and also the part about hold down the lock AND unlock keys for 1.5 seconds, then press lock, then open and close the doors.

Hopefully this should be it sorted, sorry for the spam as i could ahve sorted it allm yself using the search function