Kenwood DDX374BT Error Message ''Miswiring DC Offset''

Hi all,I have a Kenwood DDX374BT HU and from time to time I get this "miswiring DC offset error code".It shuts everything down but I can still hear sound from my front mids and tweeters very faintly.When I reset the head unit everything returns to normal until the next code occurs and it always happens with music turned up a good ways.The system has a DSP and 2 amps.Only speakers hooked to the deck are the rears and I never even hear them because I have the fader set all the way to the front.The harness behind the radio seems to be fine with no speaker wires grounding out.What could this intermittent problem be?Anybody struggled with this and figured out what it was?Thanks guys,appreciate any input

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Rumors of Bob but never Bob......So what is it you tell people you do these days Bob?

A grounded speaker terminal is the most common cause. Make sure the front speaker wires that you are not using are insulated and can not be touching ground.

Is the error only associated with wiring straight off the head unit or could it be associated with an amplifier or DSP?

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Rumors of Bob but never Bob......So what is it you tell people you do these days Bob?

i am an idiot wrote:

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A grounded speaker terminal is the most common cause. Make sure the front speaker wires that you are not using are insulated and can not be touching ground.

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See my above question,it was directed at you,thanks.

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Rumors of Bob but never Bob......So what is it you tell people you do these days Bob?

It is referring to the radio speaker wires. There is no communication from your amp and DSP back to the radio. Only the 4 sets of speaker wires on the radio harness.

factory speakers or after market? what kinda vehicle (year make model)?

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33 years as a installer now just a retired old guy. Favorite thing to install/topic are remote starts/car alarms. Stop using test lights!!!

mgoetz74 wrote:

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factory speakers or after market? what kinda vehicle (year make model)?

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2009 Nissan Sentra factory speakers in rear deck are only ones hooked to aftermarket radio.Fronts are taped off behind the radio.

I read somewhere that it could be corrosion behind the metal plate on the back of the radio.

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Rumors of Bob but never Bob......So what is it you tell people you do these days Bob?

typically factory speakers are only suppose to last 6-8 years. The rear deck are the worst, especially if your don't have tinted window. The sun shine down on them and degrades the paper cones. I would unhook the back speakers, reset the radio and see what it does. Easiest way to find a blown speaker is unhook them all and start hooking them up one by one till the deck errors out. Could have a voice coil that coming out of alignment and will only short out at a high volume

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33 years as a installer now just a retired old guy. Favorite thing to install/topic are remote starts/car alarms. Stop using test lights!!!

Did you look at what "i am an idiot" suggested? His advice is correct, no matter what you might have read somewhere.

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Support the12volt.com

yeah not gonna have a dsp and you probably don't even have bose so no amp is involved. 99% its a speaker blown. Rare that its the wire leading to the speaker, unless you have mice/animals in the car. The harness behind the radio will be a solid run from the deck to the speakers. I looked at all data and dint see any connection points. probably just a speaker

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33 years as a installer now just a retired old guy. Favorite thing to install/topic are remote starts/car alarms. Stop using test lights!!!

Well,I am still getting this message from time to time and it always happens when the music is very loud.I have the fader all the way forward so absolutely no sound is coming from the speaker wires behind the deck.The wires coming from the back of the deck are fine with no visible signs of touching metal.I have the speaker wires taped off that aren't being used.

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Rumors of Bob but never Bob......So what is it you tell people you do these days Bob?

If you have subwoofers in the trunk it is probably the voltage being produced by the moving cone making the radio think it has a problem. Open the trunk and see if it quits. Or unhook 1 terminal of each speaker.

i am an idiot wrote:

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If you have subwoofers in the trunk it is probably the voltage being produced by the moving cone making the radio think it has a problem. Open the trunk and see if it quits. Or unhook 1 terminal of each speaker.

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Now that's an interesting answer.Then cars that have subs in the trunk would have the same problem and it would be an epidemic?

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Rumors of Bob but never Bob......So what is it you tell people you do these days Bob?

If you are listening to the speakers the radio is putting out voltage. If it is not on the speaker will produce voltage and the output chip in these newer radios do have protection and it thinks there is a problem because there is not supposed to be any voltage on that wire.

Have you tried disconnecting one wire on each speaker to see if it goes away?

i am an idiot wrote:

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If you are listening to the speakers the radio is putting out voltage. If it is not on the speaker will produce voltage and the output chip in these newer radios do have protection and it thinks there is a problem because there is not supposed to be any voltage on that wire.

Have you tried disconnecting one wire on each speaker to see if it goes away?

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No,but most recent discovery is that the error code tripped with no speaker wires hooked to the deck and the RCA outputs unplugged so absolutely 0 output at any speaker.RCA's were plugged into the inputs on the DSP and that was it.I cant get it to trip without the RCA's going into the DSP though.If I could then I would know it's an HU issue but as it stands I suspect something is wrong with the DSP which is causing the HU to trip that code.Been testing various frequencies with my O-scope and was not getting a clean reading with 40hz.All other frequencies gave me a clean reading but 40hz was giving me a scattered wave.So it's looking right now like something goes haywire in the DSP at lower frequencies like 40hz.Going to continue running tests and isolating things,problem with this whole thing is that it happens VERY intermittently.I can't get it to trip on demand so it's frustrating as hell.

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Rumors of Bob but never Bob......So what is it you tell people you do these days Bob?

There is absolutely zero communication from the DSP to the radio.

i am an idiot wrote:

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There is absolutely zero communication from the DSP to the radio.

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I know you said that before but the evidence now is saying differently.The code tripped with no speaker wires from the deck hooked to any speakers.Only the RCA's were hooked and running into the DSP.It's detecting a DC offset through the RCA's that go into the DSP.It has to be because none of the speaker wires were hooked up to any speakers the last time it tripped.

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Rumors of Bob but never Bob......So what is it you tell people you do these days Bob?