leighv

Stereo problems....

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Just got back my SC430 after having the rear shocks, part of the exhaust replaced, etc, etc....

In short, I had installed a Grom Audio device, so that I could Bluetooth into the stereo, and play music from my phone, and make calls from my mobile.

It's worked, pretty well, until now...

In the past, the Grom sometimes was in limbo, and I had to restart the car if I wanted to hear the radio, cd player or the cassette (!!!)

I mention this, as the sound when it was in limbo, is similar to what I am now encountering.

Since getting the car back, I can't connect to the Grom, the sound from the radio, cd, (not tried the cassette) is the same as when it was in limbo.

Question: what could be the problem? The mechanic said that he had to take the the back end of the car off (my partner's words), to change the shocks, which would point to a problem/connection with the amp.

I've take the centre console out (as I did when I installed the Grom), and I can't see an issue, but any pointers would be appreciated.

Thanks.

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The mechanic would have taken the trim out of the boot to access the top mountings of the rear shocks. If there's no sound at all, then yes, it could be an issue with the amp or a connection to it. 

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So the mechanic has come back and said that he hasn't touched the amp - checked - and the fan on the amp isn't turning.

We've checked the 2 fuses - and they seem fine.

Therefore, I'm assuming that it's the amp that is faulty. But rather than buying another amp, is there a way to test it?

Just to be clear - there is sound coming from the radio and the cd, but it's muted.

All comments welcome.

Many thanks.

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Do the balance and fader controls work?

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Yes - both do. Thanks.

 

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I'm guessing you have the Mark Levinson system?

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Well that suggests the amp and the connection to it are okay. 

To test the amp I would disconnect the Grom, put the connections back to standard and test the system.  

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So the stereo does work without the Grom attached, so I therefore assumed it was the Grom. 

I purchased a newer version of the Grom, and have tested that - and while the stereo does work with the Grom attached, I can't get the Grom working. I've tested various cables, firmware, etc - and now Grom have come back to me and told me that it's the stereo, and that they can't help me any further.

Question: do you think the stereo is faulty, and what could be the fault that would prevent a Grom from working?

Thanks.

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Did you explain to Grom that the stereo works fine without the Grom attached? 

 

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I did, and this was their response.

Not necessarily, the port on the back of the stereo is designed for external accessory connections. This is common fault point on lexus and toyota vehicles whether it be a loss of power at one of the pins on the port or solder joints inside the pcb or the chips/circuits that translate communication from the externally connected device to the main processor of the stereo.

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What they are saying is true (though less so with the reliable SC430) but if the audio works perfectly without the Grom connected then there is no internal pcb fault or connection issue. The head unit and amp are working as they should. 

Perhaps it's time to take it to a car audio shop. I'm sure any competent audio specialist will be able to work out quite quickly if there is a fault. (ASC Audio or Absolute Audio in Wiltshire look okay)

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