Need help troubleshooting DNX9140
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Race Director
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Need help troubleshooting DNX9140
So last weekend I installed my DNX9140 and everything was fine through Monday.
This morning, I fired up my 08 Z and there was no audio for the tuner, IPod or Voice from the nav. I pulled over and then all the sudden audio was working.
Fast forward to the afternoon, I fire up and no audio again. This time my IPod was "Disconnected" along with my BTH phone. I drove for 15 minutes then audio came on but my IPod is still Disconnected. The IPod is physically connected and I can see the Kenwood insignia displayed on it.
I was thinking maybe I connected the wrong wires with the remote turn on for my amp. I used the solid blue to solid blue and blue/white to blue/white from the GM24b to the Kenwood.
However, even if that is wrong that doesn't say why my IPod quit working. I have the IPod and USB wires in a loom going to the glove box so its unlikely it got cut on a sharp edge.
Any ideas on what could be wrong?
This morning, I fired up my 08 Z and there was no audio for the tuner, IPod or Voice from the nav. I pulled over and then all the sudden audio was working.
Fast forward to the afternoon, I fire up and no audio again. This time my IPod was "Disconnected" along with my BTH phone. I drove for 15 minutes then audio came on but my IPod is still Disconnected. The IPod is physically connected and I can see the Kenwood insignia displayed on it.
I was thinking maybe I connected the wrong wires with the remote turn on for my amp. I used the solid blue to solid blue and blue/white to blue/white from the GM24b to the Kenwood.
However, even if that is wrong that doesn't say why my IPod quit working. I have the IPod and USB wires in a loom going to the glove box so its unlikely it got cut on a sharp edge.
Any ideas on what could be wrong?
Thread Starter
Race Director
Joined: Aug 2000
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Thanks for chiming in Mike.
I called Kenwood support and they gave me a firmware update (was 1.6, now 1.7) and the audio started working. Not sure if thats due to the fw though.
Looking closer at the IPod, with the car off I noticed the screen was lit up. The dang thing is locked up! That would be why the HU shows "disconnected". The IPod is kept in the glove box so it doesn't get 200deg like in the center console so I'm not sure why its locked up.
Kenwood support said if the fw update didn't fix the audio problem then to get it repaired. Hopefully its just the fw that was the problem, if not back to CarToys I go...
I called Kenwood support and they gave me a firmware update (was 1.6, now 1.7) and the audio started working. Not sure if thats due to the fw though.
Looking closer at the IPod, with the car off I noticed the screen was lit up. The dang thing is locked up! That would be why the HU shows "disconnected". The IPod is kept in the glove box so it doesn't get 200deg like in the center console so I'm not sure why its locked up.
Kenwood support said if the fw update didn't fix the audio problem then to get it repaired. Hopefully its just the fw that was the problem, if not back to CarToys I go...
Safety Car
Joined: Sep 2006
Posts: 4,364
Likes: 408
From: Greer, SC
Thanks for chiming in Mike.
I called Kenwood support and they gave me a firmware update (was 1.6, now 1.7) and the audio started working. Not sure if thats due to the fw though.
Looking closer at the IPod, with the car off I noticed the screen was lit up. The dang thing is locked up! That would be why the HU shows "disconnected". The IPod is kept in the glove box so it doesn't get 200deg like in the center console so I'm not sure why its locked up.
Kenwood support said if the fw update didn't fix the audio problem then to get it repaired. Hopefully its just the fw that was the problem, if not back to CarToys I go...
I called Kenwood support and they gave me a firmware update (was 1.6, now 1.7) and the audio started working. Not sure if thats due to the fw though.
Looking closer at the IPod, with the car off I noticed the screen was lit up. The dang thing is locked up! That would be why the HU shows "disconnected". The IPod is kept in the glove box so it doesn't get 200deg like in the center console so I'm not sure why its locked up.
Kenwood support said if the fw update didn't fix the audio problem then to get it repaired. Hopefully its just the fw that was the problem, if not back to CarToys I go...
If you have done the fw update I would save your settings and do a master reset as I had all sorts of issues with the DNX5120 in my Mustang after a firmaware update until I did the master reset. There is a little button you need to push with a pin to reset. I lost the use of my USB hub and my phone would sort of connect via Bluetooth but would not auto connect. A master reset solved both issues. Kenwood says that a USB hub won't work but I have one on my 5120 and it works fine
Thread Starter
Race Director
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I reset the IPod and it started working fine again. I'll see if there is a fw update for it, thanks for the suggestion.
The HU started acting up again today. I've ripped it out and I'm on my way to CarToys for an exchange.. I hope its not my wiring that is at fault!
The HU started acting up again today. I've ripped it out and I'm on my way to CarToys for an exchange.. I hope its not my wiring that is at fault!
Thread Starter
Race Director
Joined: Aug 2000
Posts: 17,992
Likes: 280
Welp, it wasn't the HU. I just swapped it out with a new one and no audio.
Now I think its amp related. At one point during the install I was confused on the amp turn on wire after reading an install thread. Should the antenna motor wire go to the remote amp turn on?
any tips will be appreciated!
Now I think its amp related. At one point during the install I was confused on the amp turn on wire after reading an install thread. Should the antenna motor wire go to the remote amp turn on?
any tips will be appreciated!
Safety Car
Joined: Sep 2006
Posts: 4,364
Likes: 408
From: Greer, SC
Welp, it wasn't the HU. I just swapped it out with a new one and no audio.
Now I think its amp related. At one point during the install I was confused on the amp turn on wire after reading an install thread. Should the antenna motor wire go to the remote amp turn on?
any tips will be appreciated!
Now I think its amp related. At one point during the install I was confused on the amp turn on wire after reading an install thread. Should the antenna motor wire go to the remote amp turn on?
any tips will be appreciated!
Thread Starter
Race Director
Joined: Aug 2000
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I verified I have that correct.
I also checked wire B3 on the radio plug as described here
and its getting 4.5 volts. Not sure if that is enough or not.
I began to check power at the amp, what a PITA to get that thing out. I think that job was a lost cause.
One thing I noted, was I connected ALL the speaker wires from the radio to the GM24b and the destructions say to only connect the front wires. The paper also says that because of the design of the system, there is no way of fading from front to rear with an aftermarket radio.
So I must have blown my amp because I was able to use the fader controls at one point now its dead in the water.
I also checked wire B3 on the radio plug as described here
and its getting 4.5 volts. Not sure if that is enough or not.
I began to check power at the amp, what a PITA to get that thing out. I think that job was a lost cause.
One thing I noted, was I connected ALL the speaker wires from the radio to the GM24b and the destructions say to only connect the front wires. The paper also says that because of the design of the system, there is no way of fading from front to rear with an aftermarket radio.
So I must have blown my amp because I was able to use the fader controls at one point now its dead in the water.
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Tech Contributor
Joined: May 2003
Posts: 7,035
Likes: 134
From: North Augusta, SC
According to the GMAH24B manual the blue/white wire should go to the stock amp turn on wire.
According to the 9140 installation manual the blue/white wire is the amp turn on lead.
According to your OP you matched the colors, plus you said it worked for over a week. I don't think you wired it wrong.
Check AMP fuse #31 under the hood, that's what powers the stock amp.
How did you connect the wires during the install? It's possible you just have a loose wire somewhere.
It's possible the GMAH24B went bad.
You could try to run it with the radio hanging out of the dash. Wiggle all of the connections to see if you can find a position that gets everything working properly, then narrow down the bad connection if you can.
If it still won't come on, use a meter to see if you have 12v coming out of the HU at the blue/white wire, then see if it's at the white wire at B3 of the stock plug. If your meter probe won't fit into the wire side of the plug try shoving a small paperclip in and touching the meter to it.
The C6 radio sachematics are all available here. You should be able to find the problem with just a volt meter.
Any questions on how to troubleshoot, just ask
According to the 9140 installation manual the blue/white wire is the amp turn on lead.
According to your OP you matched the colors, plus you said it worked for over a week. I don't think you wired it wrong.
Check AMP fuse #31 under the hood, that's what powers the stock amp.
How did you connect the wires during the install? It's possible you just have a loose wire somewhere.
It's possible the GMAH24B went bad.
You could try to run it with the radio hanging out of the dash. Wiggle all of the connections to see if you can find a position that gets everything working properly, then narrow down the bad connection if you can.
If it still won't come on, use a meter to see if you have 12v coming out of the HU at the blue/white wire, then see if it's at the white wire at B3 of the stock plug. If your meter probe won't fit into the wire side of the plug try shoving a small paperclip in and touching the meter to it.
The C6 radio sachematics are all available here. You should be able to find the problem with just a volt meter.
Any questions on how to troubleshoot, just ask
Tech Contributor
Joined: May 2003
Posts: 7,035
Likes: 134
From: North Augusta, SC
I also checked wire B3 on the radio plug as described here
and its getting 4.5 volts. Not sure if that is enough or not.
and its getting 4.5 volts. Not sure if that is enough or not.
Tech Contributor
Joined: May 2003
Posts: 7,035
Likes: 134
From: North Augusta, SC
One thing I noted, was I connected ALL the speaker wires from the radio to the GM24b and the destructions say to only connect the front wires. The paper also says that because of the design of the system, there is no way of fading from front to rear with an aftermarket radio.
So I must have blown my amp because I was able to use the fader controls at one point now its dead in the water.
So I must have blown my amp because I was able to use the fader controls at one point now its dead in the water.
If you really did just have 4.5v at the B3 wire, I'm wondering how you had it working for a week
Thread Starter
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dang, I just got through cutting the rear wires at the solder joints not a big deal i guess.
So I thought WTF and plugged in the factory radio. Audio works fine. Amp is fine so I'll bolt that back up.
Yes, the white wire at B3 had 4.3 -4.5 volts. So that is the problem, or at least one problem. Perhaps I have a bad GMAH24B/OS-2BOSE!
Well, I'm not going back to CarToys to get another OS-2Bose since I told them the HU was bad (per Kenwood though) and got a new one. The likely story is that its not bad
Tomorrow I'll get a new OS-2Bose and see if that does the trick!
Thanks for the detailed information and help!! Much appreciated
not a big deal i guess.So I thought WTF and plugged in the factory radio. Audio works fine. Amp is fine so I'll bolt that back up.
Yes, the white wire at B3 had 4.3 -4.5 volts. So that is the problem, or at least one problem. Perhaps I have a bad GMAH24B/OS-2BOSE!
Well, I'm not going back to CarToys to get another OS-2Bose since I told them the HU was bad (per Kenwood though) and got a new one. The likely story is that its not bad
Tomorrow I'll get a new OS-2Bose and see if that does the trick!
Thanks for the detailed information and help!! Much appreciated
Last edited by C5 Hardtop; Aug 6, 2009 at 01:26 AM.
Tech Contributor
Joined: May 2003
Posts: 7,035
Likes: 134
From: North Augusta, SC
Before spending any more money...
Try plugging in everything on the new radio except the blue/white wire. Turn it on and check the voltage on that wire, it should be 12v.
Turn everything off and connect the blue/white wire.
Fire everything back up and check the voltage on B3, it should still be 12v.
If it's only 4v, something fishy is definitely going on with one of your adapters.
GOOD LUCK
Try plugging in everything on the new radio except the blue/white wire. Turn it on and check the voltage on that wire, it should be 12v.
Turn everything off and connect the blue/white wire.
Fire everything back up and check the voltage on B3, it should still be 12v.
If it's only 4v, something fishy is definitely going on with one of your adapters.
GOOD LUCK
Thread Starter
Race Director
Joined: Aug 2000
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I'm getting 11.01V from blue/white wire from HU and the same at the plug-in (eliminating bad wire to OS-2Bose)
7.0x from B3 on wire adapter. Still not enough voltage
Getting 12V from Red wire off HU.
I'm going to wrap it up for now and shoot for the OS-2Bose adapter being bad.
Thanks!
7.0x from B3 on wire adapter. Still not enough voltage
Getting 12V from Red wire off HU.
I'm going to wrap it up for now and shoot for the OS-2Bose adapter being bad.
Thanks!
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Thread Starter
Race Director
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Got it working!!
It was the friggen GMAH24B that was the culprit. I verified the problem still reproduced before swapping out the PAC OS-2Bose since it was somewhat of an intermittant(sp) problem.
Now on to putting everything back together!
Thanks for all the help, you guys are the best resource evar!
It was the friggen GMAH24B that was the culprit. I verified the problem still reproduced before swapping out the PAC OS-2Bose since it was somewhat of an intermittant(sp) problem.
Now on to putting everything back together!
Thanks for all the help, you guys are the best resource evar!
Last edited by C5 Hardtop; Aug 6, 2009 at 03:00 PM. Reason: clerification
Safety Car
Joined: Sep 2006
Posts: 4,364
Likes: 408
From: Greer, SC
Tech Contributor
Joined: May 2003
Posts: 7,035
Likes: 134
From: North Augusta, SC
Cool
And you thought you screwed up the install
I have a GMCO adapter in my car now, but I started with a Scosche GM09SR. The Scosche started going bad after about 9 months, so it's not all that uncommon.
Now put that thing back together and go listen to some tunes
And you thought you screwed up the install
I have a GMCO adapter in my car now, but I started with a Scosche GM09SR. The Scosche started going bad after about 9 months, so it's not all that uncommon.
Now put that thing back together and go listen to some tunes
