No Audio sound on xc90 after changing the CEM and ECM

Dton · Jun 28th, 2020, 05:18

Hello
I recently changed the CEM and ECM on my volvo xc90 following a no crank problem it had. With the replacement of the new CEM and ECM the infotainment system has lost audio. The system shows power is received and I can select between FM and CD but the volume still remains on mute. Does anyone have an idea what this issue could be? I have experimented by putting back the old CEM and audio sound comes back on and radio plays fine. Unfortunately the car wouldn't work with the old CEM.

reggit · Jun 28th, 2020, 07:38

I’d be suggesting you need to get your original CEM repaired (or possibly cloned), could it just be a relay that needs changing? Need to look at a wiring diagram.

SwissXC90 · Jun 28th, 2020, 07:53

The CEM is the central brains of the car
It contains the VIN, the vehicle configuration, the mileage and much more.

Did you fit a brand new virgin CEM, and then have it programmed by the dealer?

If you fitted a 2nd hand CEM from another car, then you now have a VIN mismatch between the CEM and the rest of the vehicle.

Certain units like the audio system are VIN-matched for security purposes. The audio cannot work in another car with another VIN.

If the CEM from another car with another VIN was fitted, this activates the audio system security function and the audio system is disabled.

Solution: find a company that can clone the old CEM flash memory to the new CEM. Once cloned, the new CEM is identical to the old CEM.

Dton · Jun 28th, 2020, 09:29

Thanks a lot guys for the information. I will take a look at your suggestions.

Regards

Jun 28th, 2020, 05:18	#1
Dton New Member Last Online: Jun 28th, 2020 09:29 Join Date: Jun 2018 Location: Lusaka	No Audio sound on xc90 after changing the CEM and ECM Hello I recently changed the CEM and ECM on my volvo xc90 following a no crank problem it had. With the replacement of the new CEM and ECM the infotainment system has lost audio. The system shows power is received and I can select between FM and CD but the volume still remains on mute. Does anyone have an idea what this issue could be? I have experimented by putting back the old CEM and audio sound comes back on and radio plays fine. Unfortunately the car wouldn't work with the old CEM. Last edited by Dton; Jun 28th, 2020 at 05:23.

Jun 28th, 2020, 07:38	#2
reggit Premier Member Last Online: Yesterday 07:14 Join Date: Feb 2012 Location: Preston	I’d be suggesting you need to get your original CEM repaired (or possibly cloned), could it just be a relay that needs changing? Need to look at a wiring diagram. __________________ 2009 Volvo V70 D5 (Polestar 225bhp) r-design 180,000 miles

Jun 28th, 2020, 07:53	#3
SwissXC90 Premier Member Last Online: Mar 20th, 2024 18:26 Join Date: Jan 2016 Location: Cross Country	The CEM is the central brains of the car It contains the VIN, the vehicle configuration, the mileage and much more. Did you fit a brand new virgin CEM, and then have it programmed by the dealer? If you fitted a 2nd hand CEM from another car, then you now have a VIN mismatch between the CEM and the rest of the vehicle. Certain units like the audio system are VIN-matched for security purposes. The audio cannot work in another car with another VIN. If the CEM from another car with another VIN was fitted, this activates the audio system security function and the audio system is disabled. Solution: find a company that can clone the old CEM flash memory to the new CEM. Once cloned, the new CEM is identical to the old CEM. __________________ 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.

Jun 28th, 2020, 09:29	#4
Dton New Member Last Online: Jun 28th, 2020 09:29 Join Date: Jun 2018 Location: Lusaka	Thanks a lot guys for the information. I will take a look at your suggestions. Regards

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