Hi Guys,

I have a German 2001 LS430 whose audio system has some issues.

I have the ML audio system and an old handsfree telephone option from Siemens.

First, there was some erratic noise even if the radio/cd was switched off. This changed a few days ago: When I start the car, I can hear sound for a few seconds and the the sound completely switches off.

What I have done so far:
- My amp was defective last year and I have sent it to the repair shop which did the repair (I had a 1 year warrany on their work). I believe they are very professional (actually, they are specialised on Lexus amps). They verified that the amp is working fine.
- I removed the handsfree telephone module. I haven't found the relay for the mute wire.
- When I got the amp back, I disconnected one of the 3 wire harnesses just to figure out if I can trace back where the erratic noise comes from (navigation, radio?). I believe it comes from the radio. Since I did this, the error changed (car starts -> a few seconds sound -> silence).
- I bought a new radio/cd and installed it. The error did not change.

Questions:
- Could I have damaged something by disconnecting the wire harnesses?
- How can I get into the diagnostic menu? I am not sure what is meant by "info switch". I have a "Option" switch and when I click on it, I have a "Information" button on the touch screen. Is this meant by "Info switch"?
- How can I locate the mute wire? Where does it go (amp/radio) and which pins are used?

Thank you for your help
Alex

 

Hey lalexl I have that same problem wit my radio soon as I cut the car on I here a funny noise and sometimes I cut it on I don't hear anything and my volume docent even work. I thought I was the only one wit this problem