gunterlich

Hi folks: Does anybody know the specifications for the change in road clearance when the suspension switch is changed from 'normal' to 'high' in a LS 430 luxury edition? I am not sure mine is working - although the dealer said that it was ok. Along the same line, how do we know the 'sport' option is working - are there any tests we can perform? Thanks for any help on this subject.

Hi CuriousB: I think one of the problems is that you only get to talk to the 'sevice advisors' who have good manners but they really don't have a good grasp of the technology. Yes, as the man said, these cars are getting more complex. So what you need is people that are properly trained and experienced in the appropiate science and technology, not just 'monkey see monkey do' from an 8 week training session. What you need in these shops are perhaps people like competent automotive, mechanical or electrical engineers for appropriate consultation. There should be quite a few available at this time.

Hi CuriousB: Made some progress: Played with my system and (1) the pressure initialization message comes on after pressing the button for about 7 seconds - but it only stays up for about 5 seconds (or less) before it disappears again; and (2) the message comes on every time the button is pressed. So if you have your head by the pedals to find the button, the message will be gone by the time you look at the display. Now I'll drive car and I'll see if the 'low tire pressure' message reappears after a while. Phoned a local Lexus dealer service department. They told me that "the pressure initialization may be out of sync with the ECU. To avoid this problem we keep the engine running while changing the tires". Hmmmmm. Interesting! But sounds like an urban legend to me. Phoned another service deptartment and they did not subscribe to the above method - but they told me that "these cars were so complex and I should just bring it in". Hmmm. Neither could tell me when the message appears and how long it stays up. I am happy to report, however that nobody suggested exorcism or sacrificing a goat to dispell the haunting 'low tire pressure' message syndrome.

Thanks CuriousB: Right on - that is why I did not watch the display while pushing the button the first time. I 'll have to do some more research on the subject. Thanks again

Thanks CuriousB! I appreciate the help! Since you are knowledgable on the subject, I have some more questions. The first time I pushed the reset button (5 sec +) I had my head near the pedals to make sure I hit the right button so I could not see any messages on the display. There was no message when I got my head back up. When I pushed it again while watching the display, there was no message either. Question is, how long does the tire pressure reinitializion message stay on and should it come up each time I press the button or just the first time? Thanks again

I also have the problem on my LS 430 since I put new tires on. I have reset the tire pressure button a few times to no avail. Does the system check for low tire pressure only or does it send an alarm if all tires are overinflated ? - they put in 36 psi instead of 32 when they put on the tires