V70: Stereo/SatNav/Phone - No audio after cd got stuck

BorisDaan · Feb 27th, 2019, 17:14

My Volvo V70 from 2009 has a problem with the audio system. It started when a cd got stuck in the cd player. When i turn on the audio system it shows the volvo car on the screen briefly but then shuts down again. Also the beeping from the reversing sensor doesn't come through anymore. I've read out the error codes and it says that there is a communication error in the MOST system. I've disassembled the cd player from the car and tested without it, but it doesn't solve anything. I also disassembled the cd player itself and with a 9v battery ejected the cd. when i put it together again in the car, the eject button in the car worked once (it sounded like it wanted to eject something, although I already got the cd out). I've been looking for a replacement CD player, as it looks like that's what has crashed the system. The cd player is a Fomoco 31285459 btw.

Do any of you know if a broken cd player could cause such a error? Thanks in advance!

SwissXC90 · Feb 27th, 2019, 19:11

Bypass the CD player on the MOST bus and see if the bus and audio systems spring into life.

If it does you have identified the dead device.

BorisDaan · Mar 2nd, 2019, 18:41

Hi SwissXC90,
Thanks for the info! In the end it turned out to be the ipod/usb input device that was broken which was also connected to the MOST bus.
When I bridged it over there it all came back online, nothing wrong with the CD player luckily...

pelagicskipper · Mar 3rd, 2019, 22:56

Quote:

Originally Posted by BorisDaan

Hi SwissXC90,
Thanks for the info! In the end it turned out to be the ipod/usb input device that was broken which was also connected to the MOST bus.
When I bridged it over there it all came back online, nothing wrong with the CD player luckily...

Let us know how you get on with fixing the AUU-USB module, I am currently pricing around to try and get someone to repair it or a cheaper supplier than volvo, I have been quoted £280+vat+software

The AUU can be bypassed easily by removing the panel beside the drivers knee and disconnecting it from the MOST ring (in my 2008 s80)

Feb 27th, 2019, 17:14	#1
BorisDaan New Member Last Online: Mar 3rd, 2019 13:47 Join Date: Feb 2019 Location: Delft	No audio after cd got stuck My Volvo V70 from 2009 has a problem with the audio system. It started when a cd got stuck in the cd player. When i turn on the audio system it shows the volvo car on the screen briefly but then shuts down again. Also the beeping from the reversing sensor doesn't come through anymore. I've read out the error codes and it says that there is a communication error in the MOST system. I've disassembled the cd player from the car and tested without it, but it doesn't solve anything. I also disassembled the cd player itself and with a 9v battery ejected the cd. when i put it together again in the car, the eject button in the car worked once (it sounded like it wanted to eject something, although I already got the cd out). I've been looking for a replacement CD player, as it looks like that's what has crashed the system. The cd player is a Fomoco 31285459 btw. Do any of you know if a broken cd player could cause such a error? Thanks in advance!

Feb 27th, 2019, 19:11	#2
SwissXC90 Premier Member Last Online: Mar 20th, 2024 18:26 Join Date: Jan 2016 Location: Cross Country	Bypass the CD player on the MOST bus and see if the bus and audio systems spring into life. If it does you have identified the dead device. __________________ XC90 R-Design MY2009, Black Sapphire Metallic. HP-Sound, RSE, Nav, Tel, ParkingCam, BLIS, ParkingHeater, RestHeat, Removable Towbar, Summer: CRATUS 20x8 on Pirelli Scorpion Zeros 255/45, Winter: NEPTUNE 17x7 on Continental WinterContact 4x4 235/65.

Mar 2nd, 2019, 18:41	#3
BorisDaan New Member Last Online: Mar 3rd, 2019 13:47 Join Date: Feb 2019 Location: Delft	Hi SwissXC90, Thanks for the info! In the end it turned out to be the ipod/usb input device that was broken which was also connected to the MOST bus. When I bridged it over there it all came back online, nothing wrong with the CD player luckily...

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