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So I am just at the point where I don't want to deal with this issue anymore but some help would be greatly appreciated to point me in the right direction. I have 2012 G37x and the USB port stopped working. Sometimes, it would read "check connected device" or "no usb memory" or no message would appear when connecting my iPhone via usb. Ive tried different usb cables to see if any cables had an issue but it doesn't appear to be. On rare occasions, this issue would come up over the years but I always thought it was the usb cable itself. Recently, it just stopped altogether. I purchased a new USB port connector with no luck. So, I am down to figuring out if there is another way to reset the usb connection or if there is another solution. I performed a "self diagnosis menu test and all components found no errors. However, I looked in the error history and found two past errors "AV COMM CIRCUIT 39" and "Handsfree Unit Connection Error 1". Can someone point me in the right direction?
Also, to clarify I still get the “check connected device” message but no success in getting a connection to play music. I’ve tried an old iPod to see this made a difference and it doesn’t recognize a connection at all. I only get the message for my iphone
Last edited by playrun2212; Nov 24, 2022 at 01:28 PM.
So I am just at the point where I don't want to deal with this issue anymore but some help would be greatly appreciated to point me in the right direction. I have 2012 G37x and the USB port stopped working. Sometimes, it would read "check connected device" or "no usb memory" or no message would appear when connecting my iPhone via usb. Ive tried different usb cables to see if any cables had an issue but it doesn't appear to be. On rare occasions, this issue would come up over the years but I always thought it was the usb cable itself. Recently, it just stopped altogether. I purchased a new USB port connector with no luck. So, I am down to figuring out if there is another way to reset the usb connection or if there is another solution. I performed a "self diagnosis menu test and all components found no errors. However, I looked in the error history and found two past errors "AV COMM CIRCUIT 39" and "Handsfree Unit Connection Error 1". Can someone point me in the right direction?
Your issue might be in the cable and not the port itself.
I suggest taking the console apart to identify the type of cable/connectors and then find yourself a replacement cable.
Since this cable goes directly to the AV unit, an aftermarket replacement cable can be found. You dont need to incorporate the new wire into the wiring loom. It can be rested throughout the tunnel.
Did you try using a generic USB thumb drive to see if that made a difference? If you have one laying around- most of us do- just format it (FAT32) and pop a few mp3 files on it. See if the USB recognizes that.
Once in a blue moon mine will come with the "check connected device" error. On mine, if I slightly pull the cable out it makes a good connection. Might help for you, or not. Worth a shot.
Now, your errors are a different matter. The AV COMM and HF UNIT CONN are not related to the USB. (Ignore the numbers, they are only counters). These basically indicate that the head unit in the dash is not able to communicate with the handsfree bluetooth module located in the trunk. This could be for any number of issues, however, do you even use the handsfree phone?
Your issue might be in the cable and not the port itself.
I suggest taking the console apart to identify the type of cable/connectors and then find yourself a replacement cable.
Since this cable goes directly to the AV unit, an aftermarket replacement cable can be found. You dont need to incorporate the new wire into the wiring loom. It can be rested throughout the tunnel.
I was told if the cable is having issues then I’d have to replace the whole head unit. Is it possible just the cable can be replaced? I have never removed the console to look so I don’t know if the USB port connector cable is hardwired into anything in particular?
Did you try using a generic USB thumb drive to see if that made a difference? If you have one laying around- most of us do- just format it (FAT32) and pop a few mp3 files on it. See if the USB recognizes that.
Once in a blue moon mine will come with the "check connected device" error. On mine, if I slightly pull the cable out it makes a good connection. Might help for you, or not. Worth a shot.
Now, your errors are a different matter. The AV COMM and HF UNIT CONN are not related to the USB. (Ignore the numbers, they are only counters). These basically indicate that the head unit in the dash is not able to communicate with the handsfree bluetooth module located in the trunk. This could be for any number of issues, however, do you even use the handsfree phone?
I will see if I can try the usb flash drive method, I have never attempted this. However, shortly after I created this thread, I attempted to connect my iPhone via Bluetooth and it does work only for phone calls. There is no way to connect via Bluetooth for music audio. Unless there is a secret that I am not aware of? FYI, I do not have navigation in my car.
The "H/F UNIT CONN" error told me you did not have NAV, lol.
No NAV, no BT audio. Plain and simple. A major complaint of these cars.
A replacement USB cable is going to be difficult as they are not available to buy new. You would have to scour eBay and even then it will be a "needle in the haystack" find.
See what the USB thumb drive does and then we'll go from there. Remember, the thumb drive must be formatted to FAT32, not NTFS.
That cable is a USB mini by the console are and another weird gray connector by the unit.
It seems like these weird gray connectors are available for those folks wanting to install RCAs or 3.5mm jack aux exits.
The only thing I can think of why it wouldnt work is if the OEM cable is a fully populated Mini USB.
Wouldnt surprise if the aftermarket units have just a few wires for communication only and dont power the socket for charging purposes
Depends on how his car is setup. Most of the USB cables that Nissan uses between the port in the console and the head unit use proprietary "HiRose GT17" connectors. This is the cable I had to source back when I did my NAV swap in order to connect the USB which was what I wanted in the first place and the whole reason I did the swap in the first place:
I have found that each Nissan model is different. Some use the above GT17 connectors while others use the gray GT17HS connectors that you show above:
While others have used a combination of the "new stye" connections (above) AND the "older style" connectors:
The "old" allows 4 circuits per cable while the "new" allows 8 (plus ground/shield).
OP has to determine if the cable is truly bad. If he has a multimeter he can test each circuit. If it is bad (unlikely) then he can inspect the cable connections and go from there. My bet would be on the head unit.- as they age they are failing more and more. The wiring on these cars is pretty stout
Last edited by ILM-NC G37S; Nov 25, 2022 at 12:45 PM.
The "H/F UNIT CONN" error told me you did not have NAV, lol.
No NAV, no BT audio. Plain and simple. A major complaint of these cars.
A replacement USB cable is going to be difficult as they are not available to buy new. You would have to scour eBay and even then it will be a "needle in the haystack" find.
See what the USB thumb drive does and then we'll go from there. Remember, the thumb drive must be formatted to FAT32, not NTFS.
I tried the usb flash drive with mp3 files and established no connection.
Depends on how his car is setup. Most of the USB cables that Nissan uses between the port in the console and the head unit use proprietary "HiRose GT17" connectors. This is the cable I had to source back when I did my NAV swap in order to connect the USB which was what I wanted in the first place and the whole reason I did the swap in the first place:
I have found that each Nissan model is different. Some use the above GT17 connectors while others use the gray GT17HS connectors that you show above:
While others have used a combination of the "new stye" connections (above) AND the "older style" connectors:
The "old" allows 4 circuits per cable while the "new" allows 8 (plus ground/shield).
OP has to determine if the cable is truly bad. If he has a multimeter he can test each circuit. If it is bad (unlikely) then he can inspect the cable connections and go from there. My bet would be on the head unit.- as they age they are failing more and more. The wiring on these cars is pretty stout
My connector is the one with the green interface. What kind of multimeter am I looking at to purchase to test? If in fact the multimeter reads a bad signal in any circuits of the connector, does that mean the cable harness would need to be replaced? If all circuits read a positive result, then this would indicate my head unit is failing?
What kind of multimeter am I looking at to purchase to test?
Most digital multimeters can test for continuity- even the cheapest bare bones units. You can even test for continuity without a meter just "google" for methods. Though I would be willing to bet that if you asked a neighbor they would have one you could borrow.
There are 5 paths in the USB cable- 4 signal and one ground/shield. You would test each one separately for isolated continuity. If each path has continuity (reads zero (0)), then cable is good and the issue lies with the head unit, the jack, or the external device (iPod). If any one path reads OL (Open Line) ie. fails, the cable must be replaced.
