negative cable trick
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Would love to disconnect the negative cable for 30 minutes in hopes of correcting the slight hesitation during take off in my LS430. This was suggested in a previous thread. If I lose only the radio pre-sets and seat memory, that would be no problem. I would hate myself if I lost the navigation or something else that would require a dealer visit. I would really appreciate any comments.
Last edited by monrovea; 02-15-11 at 02:01 PM.
#2
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In my 2002, seat position memory still works after 5-20 minute disconnections, maybe even longer. The Nav system "Previous Destinations" will be lost after 5-20 minutes. The Marked Points and Home/1/2/3/4/5 buttons are not lost though. The HomeLink/garage door presets are not lost either.
I think the radio presets stay for 5 minute disconnections (not 100% sure though, I don't use radio much).
The factory procedure to reset automatic transmission learned values and to reset the OBD-2 codes/drive cycle monitors/etc (without using the Lexus handheld tool or a Techstream laptop) is to disconnect the battery for 5 minutes.
If you want to reset everything and be sure of it, leave your battery disconnected overnight. You won't need to see a dealer after everything is reset. Be sure to save your important Nav points as Marked Points.
It's probably a good time to clean your battery terminals (make a paste of baking soda and water, apply to terminals and clamps, then wipe off residue with a cloth slightly dampened with plain water). Then apply dielectric grease to the terminals and clamps to prevent further buildup.
I think the radio presets stay for 5 minute disconnections (not 100% sure though, I don't use radio much).
The factory procedure to reset automatic transmission learned values and to reset the OBD-2 codes/drive cycle monitors/etc (without using the Lexus handheld tool or a Techstream laptop) is to disconnect the battery for 5 minutes.
If you want to reset everything and be sure of it, leave your battery disconnected overnight. You won't need to see a dealer after everything is reset. Be sure to save your important Nav points as Marked Points.
It's probably a good time to clean your battery terminals (make a paste of baking soda and water, apply to terminals and clamps, then wipe off residue with a cloth slightly dampened with plain water). Then apply dielectric grease to the terminals and clamps to prevent further buildup.
Last edited by StanVanDam; 02-15-11 at 02:39 PM.
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my LS always fails to start on the first fire after reconnecting the battery, but fires back up super quick on the second attempt (only when resetting the car for 30+ mins of unhooked battery). it also takes about 30 seconds to a minute for everything to come back fully to life. the climate controls are a little slow to come back to life and the nav takes a minute to process the correct locations and what not.
the battery trick is something i was told that all used car dealerships do to make you feel like your in a brand new sporty car,, you know what they say,, there is an *** for every seat!!!
the battery trick is something i was told that all used car dealerships do to make you feel like your in a brand new sporty car,, you know what they say,, there is an *** for every seat!!!
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I wonder if the factory reset setting for the system has a preset logical coding that commands the transmission to shift at higher points - then that coding is changed when it learns the driver(s) habits. I wonder how long of a loop does it require for the system to "learn" one's Driving habits and if it is tied into the daily mileage/commute.
I am a moderate driver so Im guessing the shift points for me would lower over time - I just wonder if I drive sporty for a time would those shift points stay slightly higher when the system is driven moderately for a time, or would they be equal shift patterns and rise to the occasion without hesitation when called upon. Something I would need to test out I guess.
I am a moderate driver so Im guessing the shift points for me would lower over time - I just wonder if I drive sporty for a time would those shift points stay slightly higher when the system is driven moderately for a time, or would they be equal shift patterns and rise to the occasion without hesitation when called upon. Something I would need to test out I guess.
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I wonder if the factory reset setting for the system has a preset logical coding that commands the transmission to shift at higher points - then that coding is changed when it learns the driver(s) habits. I wonder how long of a loop does it require for the system to "learn" one's Driving habits and if it is tied into the daily mileage/commute.
I am a moderate driver so Im guessing the shift points for me would lower over time - I just wonder if I drive sporty for a time would those shift points stay slightly higher when the system is driven moderately for a time, or would they be equal shift patterns and rise to the occasion without hesitation when called upon. Something I would need to test out I guess.
I am a moderate driver so Im guessing the shift points for me would lower over time - I just wonder if I drive sporty for a time would those shift points stay slightly higher when the system is driven moderately for a time, or would they be equal shift patterns and rise to the occasion without hesitation when called upon. Something I would need to test out I guess.
i drove my old GS400 (w/ a performance mod or 2) a lot more spiritedly if you will than my present LS430 and after about 2 whole weeks it would start to revert back to the softer and lower shift points and by week 4 i could notice the slight hesitation again. i always reset my gs ever month, but i was trying to get it to be fast so i don't carry this same approach to the LS obviously.
for me the deciding factor was when i accidentally pulled out in front of a car and he almost slammed into the back of me since well for one i pulled out in front of him but secondly because there was like a 1.5 second delay when i mashed the pedal to the floor before anything happened. then i went home and reset the GS and have tried not to let it get that bad ever again, and i also try to limit my pulling out in front of cars too
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