@Arbe_gtcThank you for the fast answer. Does it mean eprom no need for a checksum?

But when I tried to edit EPROM the check it in DPS to get info I got the result that EPROM fault. 

Maybe there is a Checksum but is a different kind than Cal files.

Or you edit something wrong, post Org and Mod eeprom.(What do you wanted to Change?)

 

Maybe i'm wrong shoud the eeprom look like that (so many 0x00/0xFF/0x20?)

There is no Vin or PIN?

 

45 minutes ago, Rustam Abdullayev said:

@Arbe_gtcThank you for the fast answer. Does it mean eprom no need for a checksum?

But when I tried to edit EPROM the check it in DPS to get info I got the result that EPROM fault. 

In the bin file that you shared, there is no VIN or PIN... is that BCM new? used? It seems to be corrupted, but there is some information in the BIN.

 

 

 

@Robi_XHello, thank you for asking I am going to return the BCM to the virgin. Yes, there is no VIN due to this is New BCM.

There is the EPROM which I am going to return to virgin 

BCM EPROM QWE.bin

@Arbe_gtcThis is EPROM from the new BCM. I wanted to discover how to return the used BCM to virgin. You can say that I can clone the EPAOM and FLASH from new to used, but I wanted to discover how to return virgin with the original serial number which is in the used BCM. Here is EPROM which I going to return to the virgin.

BCM EPROM QWE.bin

5 hours ago, Rustam Abdullayev said:

@Arbe_gtcThis is EPROM from the new BCM. I wanted to discover how to return the used BCM to virgin. You can say that I can clone the EPAOM and FLASH from new to used, but I wanted to discover how to return virgin with the original serial number which is in the used BCM. Here is EPROM which I going to return to the virgin.

BCM EPROM QWE.bin 4 kB · 1 download

Just write virgin file to eeprom,, program bcm ,, program immobiliser with existing transponder key,,done

The checksum calculation can be different for everyone. For example, in BCM Opel using 16-bit Big-Endian, you need to add 8000 to the resulting result to get the correct checksum. We get Buick's checksum right away without adding anything. Before changing, calculate the checksum and check it to know the correct method.

@Mindaugas CerniusThank you for your advice. But how to calculate the checksum before changing. I'm a novice in this matter

29 minutes ago, Rustam Abdullayev said:

@Mindaugas CerniusThank you for your advice. But how to calculate the checksum before changing. I'm a novice in this matter

Read this thread from the first message and you cand find the answer.

Anyone have any tips on how to find the checksum for a file that doesn't follow the norm?

Here is the cal file I'm working with.

1-Check-Sum.bin

12 hours ago, BLKATSG said:

Anyone have any tips on how to find the checksum for a file that doesn't follow the norm?

Here is the cal file I'm working with.

1-Check-Sum.bin 511.97 kB · 2 downloads

Is that an OS file?  What module is it for as that would help too.  Some of these checksums can get pretty complex!

 

I'll take a guess, is it a cluster 🙂 haha

 

Yes it is a cluster OS file haha, but an older one.  

 

6G2EC57Y99L199784 (this is a 2009 vin, but it was a split year so this is the older cluster)

This is one for a 2008 Pontiac G8, the 2009 G8 follows the standard checksum system.

 

I still haven't figured this out, and I've tried a bunch of combos.  Admittedly I'm not very fluent in checksums.

On 9/20/2021 at 9:52 PM, d533902 said:

Hi Troy, you have some unnecessary steps there. Why are you switching from Hex to Binary?

 

68cf  XOR FFFF = 9730 

 

XOR function is probably built into your calc and its also built into windows calculator when in programmer mode

 

Not the best contribution but sharing what I have

 

I can confirm that this trick is working for BCM calibrations.

Just use Windows Calculator, type last 4 hex symbols from Hex Editor calculated checksum, select bitwise -> XOR and type FFFF.

The result is the checksum for file.

Which bytes in a BCM Calibration, is the Checksum? Is it in the beginning? There are many, many bytes in every Calibration.

1 hour ago, tjshadyluver said:

Which bytes in a BCM Calibration, is the Checksum? Is it in the beginning? There are many, many bytes in every Calibration.

in the first message of this thread, in Step 12.

You have the position of the checksum

Lol yeah I went to page 1 and read from the beginning! So cool to have learned that. I'm gonna play soon.

Hello colleagues. After calculating the CheckSum I got the result f2, how do I write the first four bytes?

00

Hi the calibration file that being edit is that the direct file we get from ex sps cache  or is it after we have done DPS archive zip file  and then we edit the calibration file?

Hi the calibration file that being edit is that the direct file we get from ex sps cache  or is it after we have done DPS archive zip file  and then we edit the calibration file?

27 minutes ago, Dan79 said:

Hi the calibration file that being edit is that the direct file we get from ex sps cache  or is it after we have done DPS archive zip file  and then we edit the calibration file?

the cache files are zipped. you need unzip it with 7zip and you can edit it, after edit, create the zip package for DPS

thx so i unpacked the file with 7zip and got the bin file, edit that now but what now? most a zip the file again or can i use it directly to create zip package dor DPS?

46 minutes ago, Dan79 said:

thx so i unpacked the file with 7zip and got the bin file, edit that now but what now? most a zip the file again or can i use it directly to create zip package dor DPS?

use SPAT option in DPS to create the package