Last post on Mar 05, 2010 at 8:48 AM
You are in the Lexus RX 300/330/350
What is this discussion about?
Safety Technology, SUV
#13 of 17 Re: Unintended Acceleration [steve_]
Jan 22, 2010 (10:36 am)
What do I think..??
Not a surprise.
The time has long since passed for the designers to have begun using firmware to DRIVE the throttle opening servomotor to the idle position with the brake applied.
Or use a torque motor on the gas pedal itself instead of a spring. The torque motor could then be used to provide the driver with vibratory feedback if/when wheelspin/slip is detected.
Many of the new EPS, Electronic Power Stearing, systems now use ("directed" by VSC) differential power stearing "assist" torque to prompt the driver to not turn the stearing wheel in the wrong direction.
#14 of 17 2009 RX 350 engine revs when shifting gears
Feb 05, 2010 (3:39 pm)
I bought a Lexus RX 350 (brand new from Kendall Lexus in Eugene,Oregon) in 10/22/09. I noticed when I got it home that when shifting between gears the engine frequently revs up (1000-2000 rpms then catches the next gear). I talked to the dealer when I had some service work done in November 2009. I was told it's a common problem, a computer chip is faulty and it won't hurt anything. It's still doing it and I'd like to know what to do. Is there a phone number to talk to someone higher up in Lexus?
#15 of 17 Re: 2009 RX 350 engine revs when shifting gears [tuna5]
Feb 06, 2010 (8:07 am)
These new 6(9) speed transaxles will often use the torque converter lockup clutch in the top 2 or 3 gear ratios, not just OD. When you change gears the lockup clutch will get disengaged until the ECU has time to "judge" the engine load factor in the new gear ratio. So, momentarily you will be making use of the torque converter which results in a higher engine RPM than if/when the lockup clutch is subsequently engaged.
But even so, 2000 RPM does seem extreme, 1000-1500, maybe.
You might experiment with turning the OD switch off and on in different gear ratios and engine loadings to get an idea of the engine RPM changes with and without the lockup clutch engaged.
#16 of 17 Why No Lexus Recalls?
Feb 28, 2010 (12:06 am)
Friend of mine took is 07 ES 350 in for an oil change and 4 hours later they gave his car back after reshaping the pedal, removing foam from under the carpet, reprograming his computer, and filling up his gas tank for free. Lexus is dishonest in not recalling the ES and the SUV based on the Highlander. They have the same acceleration problems. I will not buy a Lexus or Toyota product again. NEVER
#17 of 17 Re: Why No Lexus Recalls? [jsdtx]
Mar 05, 2010 (8:48 am)
A recall on a Lexus...
Horror of HORRORS...!!