lexus69 Posted June 19, 2003 Share Posted June 19, 2003 Hi all...I have a 1998 ES300. I can't seem to find any info to confirm that IF I disconnect the battery, will I require to enter anti-theft codes to the Radio (factory installed radio) and or to turn on the car? I bought this car used...obviously I don't have any codes. I am trying to put in a new alarm with auto-start, but that would need to disconnect the battery. I want to make sure the radio still works and I can start the car after that. Quote Link to comment Share on other sites More sharing options...
bbsal Posted June 19, 2003 Share Posted June 19, 2003 it wont ask you for codes unless you entered one in the radio and activated the security in it.i think you will be fine disconnecting the battery.heres the easy way to check.there should be some kind of light that either flashes or stays red when you get out the car and lock the doors on the radio.not the security alarm light but a different one that tells you its activated in the radio.if you dont see anything then your fine. Quote Link to comment Share on other sites More sharing options...
lexus69 Posted June 19, 2003 Author Share Posted June 19, 2003 bbsal, I can only recall that there is only 1 security light that blinks after I lock the car. I will confirm that when I get home later. Is this flashing red light (whatever light) on the radio display? Or near the security light? People also warning me about if I disconnect the battery, I will have to reset the computer...etc, is that true? thanks! Quote Link to comment Share on other sites More sharing options...
amf1932 Posted June 19, 2003 Share Posted June 19, 2003 On a '94 ES that I had previously, the only thing that happened when I replaced the battery was the radio lost it's memory on the pre-set stations. Alan Quote Link to comment Share on other sites More sharing options...
lex Posted June 19, 2003 Share Posted June 19, 2003 On a 92-93 ES radio there is a little symbol of a key under the volume knob, that lights up if the anti theft is activated. Dunno if thats on the 98 radio though. Quote Link to comment Share on other sites More sharing options...
SKperformance Posted June 19, 2003 Share Posted June 19, 2003 you should be fine i don't think there is a code for it the ecu is always relearning so don't even worry about that either may even work better after Quote Link to comment Share on other sites More sharing options...
lexus69 Posted June 20, 2003 Author Share Posted June 20, 2003 Thanks to all who responded. I don't see a security light for the radio, so I suppose it will work if I ever disconnect the battery. I would assume the same for the car's computer? -k Quote Link to comment Share on other sites More sharing options...
bbsal Posted June 20, 2003 Share Posted June 20, 2003 no problem.also your computer will relearn everything anyway.the only thing you will have to do is re set the preset stations on the radio becuase it will lose them in memory but thats not a big deal at all. Quote Link to comment Share on other sites More sharing options...
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