I recently failed a smog test on my 99 LX470 where the smog tech said that the computer wasn't ready, this happens when history is deleted from a battery disconnect or by manually clearing codes. I disconnected the battery months ago and have driven quite a bit since then so I'm surprised this is happening. He thinks there may be a problem with the computer. When I connect to techstream all of the systems are highlighted in yellow indicating status unknown, is that the case for everyone? I am able to get live data when I open a specific area, so that is working. I'm just not sure if I can use Techstream to tell me when the vehicle is ready for smog. Thanks for your help.