Does anybody know the master security code for the Pioneer radio in the 1990 LS400? The face plate on my radio reads SEC and the steps given in the owners manual don't do anything. This happened once before and I had to take it to the dealer. It took him like 10 seconds and it was working again. It's a hassle for me to take the car down to the dealer and I would like to avoid it at all costs. If anyone has the code and instructions I would appreciate it if you could e-mail it to me at rexus31@hotmail.com. Thanks.

 

the next time have the dealer put the code back to no code. the code on a lexus is only owner installed . it isnt burned in the code chip like other makes. 99.99% of lexus owners didnt install a code and you can set up radio so it doesnt need one once you get the code again. i have the es 300 master radio code number but i never tried it on ls400.

 

Try '666'