Hey all. So recently my Bluetooth stopped working. I have the hi fi system with nav on my 07 mcs. No usb.

It tells me in order to use Bluetooth I have to switch it on but I have no such option to do so. Little help!? I had it working in the past.

Thanks in advance.

 

Anyone?

 

?? will this help

 

No, I've already had it paired before. I know how to do that already. It's just at this point, the car is telling me to turn its Bluetooth on and its not an option.

 

That happens when your MULF module (Bluetooch ECU) fails to communicate with the headunit (radio or CCC, depending on your configuration).

Why this happens I cannot tell without further testing, but either it is a bad MULF, or the MOST ring (fiber-optic ring) is open somewhere.

First thing to check, is if the MOST diagnosis interface is properly closed. It should be on the passenger side of the car, opposite where the fuses are located. (Please verify as I drive a RHD car so some things are swapped but others not)

I also suggest you get to a computer with DIS or ISTA-D read the stored errors and run the appropriate tests.