Volvo V50 2.0 T5 Cem config problem

**bobbik** · 12th June, 2019, 01:26 PM

Someone was here . Car starts, but everywhere are config DTC stored. VIN, body style, year, and engine type stored in CEM doesn't match. I dont know which MCU stores config, (right one stored keys and synchro, left- no idea) . What options do i have?
1) buy volvo access and update CEM, but i'm affraid it will check update for VIN stored in CEM?
2) try to find similar car dumps, and make keys and synchro?
4) .... dont know

**kaponne** · 12th June, 2019, 05:31 PM

First you can post your original VIN
Second post full CEM dump

**bobbik** · 18th June, 2019, 08:13 AM

full you mean flash and eep from both MCU's?

**madman47** · 18th June, 2019, 01:05 PM

Hey, Id try by changing VIN in the flash data of the 9S12 1K79X at $3BC0B onwards and then do a CEM reload online with Volvo. Dont know if changing the VIN will have a checksum error..... sorry i cant be more help

**kaponne** · 18th June, 2019, 04:25 PM

Originally Posted by bobbik

full you mean flash and eep from both MCU's?

yes, both flashes and eeproms

**forumoto** · 18th June, 2019, 08:00 PM

Originally Posted by madman47

Hey, Id try by changing VIN in the flash data of the 9S12 1K79X at $3BC0B onwards and then do a CEM reload online with Volvo. Dont know if changing the VIN will have a checksum error..... sorry i cant be more help

I have done such trick before and did not work, even though the changed vin in the cem was called up by vida, but along the line when I try to purchase cem reload, the system performed checks and came back with error that hardware does not much or part number does not match

**bobbik** · 20th June, 2019, 07:32 AM

Ok, I'll upload files Monday. I think something was replaced (some kind of "set" like CEm with ECU and keys?)
Because car has clogged roof window drainage pipes and huge water problem inside.

**bobbik** · 1st July, 2019, 04:38 PM

Originally Posted by kaponne

First you can post your original VIN
Second post full CEM dump

car VIN is Yv1mw684152050761

i think flash of 1k79x is from other car.

**bobbik** · 1st July, 2019, 04:50 PM

how the duck solve it??

**kaponne** · 2nd July, 2019, 01:56 PM

I see 0L85D have bad reading.

Do you have problems with ICM, AUD, Remote Keys and etc , all work?

**bobbik** · 2nd July, 2019, 03:50 PM

no, just bad config errors in SRS and ABS.

**kaponne** · 2nd July, 2019, 07:54 PM

solution, try it
...

**bobbik** · 3rd July, 2019, 11:12 PM

@kaponne , how to register used AUD module (amplifier in the trunk) to the MOST net? Or how to disable MOST protection?

**urcarpc** · 6th October, 2020, 03:07 AM

Engine, abs, srs and radio are in block 0x0F8100 of left mcu flash. Changing 1 byte from it will cause dead car or lock mcu. Maybe due to checksum error