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Solved ✔ BMW F10 2016 CAS4 corrupted
08-01-2023, 06:05 AM, (This post was last modified: 14-01-2023, 15:40 PM by raffy haddad.)
Post: #1
XZBMW  BMW F10 2016 CAS4 corrupted
Greetings.
I wanted to save file to make a spare key, used vvdiprog cas4 adapter to read dflash, then I tested in bench and it was ok. 
When pluggin cas4 back in car,  ignition turns on, car starts and remote locking works but ignition always turns off 45 seconds after pressing the start button(with and without engine started), I can immediatly turn on but it eventualy turns off again.

CAS4 is not recognized by scanner

part number is 

61.35-6 809 372.9-02
5WK50920BBR

I suspect something got corrupted, can anyone check dump pls


Attached Files
cas4 dump dflash pflash fault.rar
File Type: .rar
Downloaded: 7 times
Size: 272.81 KB

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08-01-2023, 10:18 AM,
Post: #2
RE: BMW F10 2016 CAS4 corrupted
How about cas4 cafd coding? Did you check that?
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08-01-2023, 12:37 PM,
Post: #3
RE: BMW F10 2016 CAS4 corrupted
(08-01-2023, 06:05 AM)wosanyn31 Wrote:  Greetings.
I wanted to save file to make a spare key, used vvdiprog cas4 adapter to read dflash, then I tested in bench and it was ok. 
When pluggin cas4 back in car,  ignition turns on, car starts and remote locking works but ignition always turns off 45 seconds after pressing the start button(with and without engine started), I can immediatly turn on but it eventualy turns off again.

CAS4 is not recognized by scanner

part number is 

61.35-6 809 372.9-02
5WK50920BBR

I suspect something got corrupted, can anyone check dump pls

Write this pflash...
CAS4_P-FLASH _2020_07_16_14_04_23.rar
File Type: .rar
Downloaded: 4 times
Size: 267.7 KB


I help you please rate and thank you.
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[+] 1 user says Thank You to Gabriel87 for this post
09-01-2023, 00:20 AM,
Post: #4
RE: BMW F10 2016 CAS4 corrupted
Ok I did write the given flash, but car has same behavior ignition turns off after 1 minute and CAS is not recognizes in test.
I found out that CAS can be detected for a few second after plugging it in bench, in that time dtc and part number can be read, after those seconds CAS can't be scanned but still ignition can be turned on
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09-01-2023, 00:33 AM,
Post: #5
RE: BMW F10 2016 CAS4 corrupted
(09-01-2023, 00:20 AM)wosanyn31 Wrote:  Ok I did write the given flash, but car has same behavior ignition turns off after 1 minute and CAS is not recognizes in test.
I found out that CAS can be detected for a few second after plugging it in bench, in that time dtc and part number can be read, after those seconds CAS can't be scanned but still ignition can be turned on

Try encode the cas in time while it comunicate.. if this not work need to chek eeprom coruption or soldering
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[+] 1 user says Thank You to rs@chip for this post
09-01-2023, 07:50 AM,
Post: #6
RE: BMW F10 2016 CAS4 corrupted
(09-01-2023, 00:20 AM)wosanyn31 Wrote:  Ok I did write the given flash, but car has same behavior ignition turns off after 1 minute and CAS is not recognizes in test.
I found out that CAS can be detected for a few second after plugging it in bench, in that time dtc and part number can be read, after those seconds CAS can't be scanned but still ignition can be turned on

Coding cas with esys.
You have esys i help you with remote.

I help you please rate and thank you.
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10-01-2023, 05:17 AM,
Post: #7
RE: BMW F10 2016 CAS4 corrupted
it seems that esys reading take to long for the available time window(less than 5 seconds)...
For some reason, now I can't modify data with vvdi prog, operation failed when trying to unlock, can still read though.
hextag/hexprog throws partition error when trying to read

Any last suggestion before buying another control unit?
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10-01-2023, 07:30 AM,
Post: #8
RE: BMW F10 2016 CAS4 corrupted
can bus errors persist?
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10-01-2023, 09:46 AM,
Post: #9
RE: BMW F10 2016 CAS4 corrupted
(10-01-2023, 05:17 AM)wosanyn31 Wrote:  it seems that esys reading take to long for the available time window(less than 5 seconds)...
For some reason, now I can't modify data with vvdi prog, operation failed when trying to unlock, can still read though.
hextag/hexprog throws partition error when trying to read

Any last suggestion before buying another control unit?

Partition you can set with VVDI prog . If you have dificult to unlock MCU try to heat it.

If  I helped you press magic buttons  clapping
Reputation: +1 - wosanyn31 [+1]
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[+] 1 user says Thank You to pepi for this post
14-01-2023, 15:17 PM,
Post: #10
RE: BMW F10 2016 CAS4 corrupted
ok, stopped using adapter, partitioning with vvdi and rewriting original data did solve the problem, next time I'll be more mindful when working with adaptors
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