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RX400H surge power on stopping

14 messages,  Last post on May 20, 2009 at 5:29 AM

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#11 of 14 Re: Mr. West--help [nmrk] by wwest Apr 25, 2009 (10:28 pm)
Replying to: nmrk (Apr 25, 2009 9:23 pm) Is it really a surge or more like what I describe, a slight or moderate loosening of braking..??   A true SURGE forward, actual forward acceleration, would indicate other problems. Replies to this message: nmrk (May 06, 2009 7:37 pm)
#12 of 14 Re: Mr. West--help [wwest] by nmrk May 06, 2009 (7:37 pm)
Replying to: wwest (Apr 25, 2009 10:28 pm) Mr. West:   My Lexus is resting this week--however, when I next drive it, I will try to ascertain whether I am sensing a "surge" versus, as you suggest, a "loosening of braking." You may be correct that what I am experiencing is loosening of braking. I would never take my foot off the brake to coast into a parking place so should not smash into anything. I had the car checked again at the Lexus dealer and nothing appeared to be abnormal.   Thank you for replying.
#13 of 14 Re: RX400H surge power on stopping [wwest] by billysbarn1 May 17, 2009 (3:40 am)
Replying to: wwest (Mar 27, 2009 9:27 am) Here is my pennie's worth! I have a 2006 400h and I notice when going down a steep hill, especially when the engine is cold, (but perhaps that is when I hit the first steep hill) that as I am gently braking the regen is putting a nice amount of power back in the battery and the meter is well into the blue, then after a few seconds the braking lifts off for a fraction of a second, the car runs away and the charging stops but the friction brakes kick in. However, I think that is because I subconsciously press the pedal slightly harder and all is well again. Then I release the pedal and press gently and regen kicks in again and drops out after a few seconds and the process continues as described above till I get to the bottom of the hill.   I thought that was normal and happening because the regen wasn't able to provide enough braking but perhaps not....   I am used to it now and it's no problem to me.   Enjoy your car.. I do I have no intention of changing it for another 10 + years!!   Billy Replies to this message: wwest (May 20, 2009 5:29 am)
#14 of 14 Re: RX400H surge power on stopping [billysbarn1] by wwest May 20, 2009 (5:29 am)
Replying to: billysbarn1 (May 17, 2009 3:40 am) My '01 AWD RX300 does something strange, "washboardy" road feel, when lightly braking going down a slight grade with the roadbed wet. It's as if the ABS is very lightly modulating the brakes. I seem to remember that someone at the dealer told me that it was the EBD, Electronic Brakeforce Distribution, activating.   If your "H" has the same EBD feature then it is likely that regen would have to be disabled when it activates.

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