LEXIE Posted April 8, 2004 Share Posted April 8, 2004 Are there any precautions in temporarily disconnecting my battery other than negative cable first. Will I foul computer system up and if so how do I restore previous settings after reconnecting. '93 SC400 Quote Link to comment Share on other sites More sharing options...
chips229 Posted April 8, 2004 Share Posted April 8, 2004 Im no expect but becareful that you dont loose the radio code,not sure how long if the battery disconected before the radio code would need to be entered. Quote Link to comment Share on other sites More sharing options...
OKSC3 Posted April 8, 2004 Share Posted April 8, 2004 You won't ruin the computer or anything, anything that actually requires work needs the battery replaced... You will loose your radio settings of course, but that is about it. And you might see a slight performace increase while the ECU relearns fuel curves and such. But it won't last long. Long story short, you won't ruin anything... But if you have a stereo that needs a code after reset make sure you know it first, I am sure lexus charges an arm and a leg to look it up. (much like mitsubishi does) Quote Link to comment Share on other sites More sharing options...
chips229 Posted April 8, 2004 Share Posted April 8, 2004 I am sure lexus charges an arm and a leg to look it up. (much like mitsubishi does) to true,Lexus uk have told me that on my mk1,the radio code is useally part of the vin number of the car.. Quote Link to comment Share on other sites More sharing options...
johnny3 Posted April 8, 2004 Share Posted April 8, 2004 Hook a battery charger or another 12v battery to your cables before you remove them, then you won't lose any of your settings. I've heard of people using a little 9v battery to do the same thing (preserve settings.) Quote Link to comment Share on other sites More sharing options...
bstein333 Posted April 9, 2004 Share Posted April 9, 2004 I think there are even little battery systems you can buy that plug right into your cigarette lighter and do the same thing of maintaining radio memory and all that business. I don't remember where I saw them though, sorry Quote Link to comment Share on other sites More sharing options...
OKSC3 Posted April 9, 2004 Share Posted April 9, 2004 Wouldn't that negate the whole idea of disconnecting the battery? Unless your replacing the battey of course... Quote Link to comment Share on other sites More sharing options...
rich21 Posted April 10, 2004 Share Posted April 10, 2004 yeah, all that will happen is you wiil lose the radio station settings and you would just have to set your clock. Quote Link to comment Share on other sites More sharing options...
LEXIE Posted April 11, 2004 Author Share Posted April 11, 2004 thx for all the replys guys. the reason i asked the quest was because i was going to replace the seals in my p/s unit and needed to disconnect the bat. regarding the p/s job, although it took me yesterday and today, all went well and because of all the info here and on other sites there were no big supprises. of course the infamous two back bolts were the biggest deal. i was able to remove the pump under the hood but when replacing, i couldn't keep the lower back bolt from falling out before i could get it started (threaded) so i fianlly had to jack the car up and go in from underneath. i also thoroughly cleaned the reservoir out and a quite a bit of s**t came out. after installing the rebuilt pump i purged all the old fluid out and now i am in the process of deaerating the new fliud in the system. the pump is getting smoother with each cycle of starting and rotating the wheels to complete stop, left and right. i hope all holds up...it feels good to save some $800 bucks after all is done. thx again to all for the many questions that were answered. lexie. ps... the solo drive belt removal and replacement was a snap as one of the previous posts stated it would be. Quote Link to comment Share on other sites More sharing options...
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