Hi,
I as the title says I have trouble with checksums on a dpf off for my volvo s40 edc16c34 1.6d 2008.
I managed to read the ECU in BDM and I found and modified the dpf switch in Winols. Now the problem is that the car starts but I get an error code saying: "ECM fault: wrong checksum".
I have attached the modified and original files, Is my file ok?

Many thanks in advance.

Kpower wrote:Hi,
I as the title says I have trouble with checksums on a dpf off for my volvo s40 edc16c34 1.6d 2008.
I managed to read the ECU in BDM and I found and modified the dpf switch in Winols. Now the problem is that the car starts but I get an error code saying: "ECM fault: wrong checksum".
I have attached the modified and original files, Is my file ok?

Many thanks in advance.

Checksums look ok to me

wbr

Shooting wrote:Checksums look ok to me

wbr

I use a Galletto v54 in BDM, should I try to not correct the checksums when the tool asks me to before writing?

Kpower wrote:

Shooting wrote:Checksums look ok to me

wbr

I use a Galletto v54 in BDM, should I try to not correct the checksums when the tool asks me to before writing?

Maybe your tool is not correcting correctly, sometimes this happens

wbr

Shooting wrote:
Maybe your tool is not correcting correctly, sometimes this happens

wbr

It's a shame because I tested the car today and dpf wise it worked flawlessly, no regens and no wrong pressure codes. It just shows a code like in the picture and despite that it starts and no lights are showing in the dashboard. I'm tempted to leave it like that for now but I'm scared that it might randomly not start. Could it be a Volvo specific problem?

Kpower wrote:

Shooting wrote:
Maybe your tool is not correcting correctly, sometimes this happens

wbr

It's a shame because I tested the car today and dpf wise it worked flawlessly, no regens and no wrong pressure codes. It just shows a code like in the picture and despite that it starts and no lights are showing in the dashboard. I'm tempted to leave it like that for now but I'm scared that it might randomly not start. Could it be a Volvo specific problem?

Here is the picture I was talking about. Sorry for the quality.

Kpower wrote:

Kpower wrote:

Shooting wrote:
Maybe your tool is not correcting correctly, sometimes this happens

wbr

It's a shame because I tested the car today and dpf wise it worked flawlessly, no regens and no wrong pressure codes. It just shows a code like in the picture and despite that it starts and no lights are showing in the dashboard. I'm tempted to leave it like that for now but I'm scared that it might randomly not start. Could it be a Volvo specific problem?

Here is the picture I was talking about. Sorry for the quality.

Have you tried writing back without allowing the tool to auto correct?
Could be worth a try..

wbr

Shooting wrote:Have you tried writing back without allowing the tool to auto correct?
Could be worth a try..

wbr

Yes, I tried but I get the same result. Maybe I should try to do a "write all", with the modified flash and original eeprom combined and see if that works.

Kpower wrote:

Shooting wrote:Have you tried writing back without allowing the tool to auto correct?
Could be worth a try..

wbr

Yes, I tried but I get the same result. Maybe I should try to do a "write all", with the modified flash and original eeprom combined and see if that works.

At this point it couldn't hurt... have you tried putting the original back?

wbr

Shooting wrote:At this point it couldn't hurt... have you tried putting the original back?

wbr

Yeah, I tried and with all the original files I have no errors.
After a little bit of research i found out that the ECM-7700 code is normal when removing dpf in these cars. It seems that the only way around that is to reprogram the CEM wich is not an easy task without specific factory tools.
Despite that I have no codes in the dash and the car runs and drives fine so I guess I'll leave it like this.

Thank you for your patience and support!