Vida CEM swapping

[vtl]

SRS Can command was CB 58 AF 11 00 00 00 00 to clear all stored 2 byte DTCs. I sent the same command (CB 50 AF 11 etc) to the CEM, and DIM and ECM, but the SRS Airbag Urgent error has not disappeared. I wonder if another module is storing the codes or my SRS module is dead.

SRS does not erase errors, it only deactivates them. Once its EEPROM is full of inactive errors, the currently active error can't be erased. Volvo dreams of you rushing to dealer for a new SRS, but crafty people manage to edit it by hands

[dikidera]

SRS Can command was CB 58 AF 11 00 00 00 00 to clear all stored 2 byte DTCs. I sent the same command (CB 50 AF 11 etc) to the CEM, and DIM and ECM, but the SRS Airbag Urgent error has not disappeared. I wonder if another module is storing the codes or my SRS module is dead.

SRS does not erase errors, it only deactivates them. Once its EEPROM is full of inactive errors, the currently active error can't be erased. Volvo dreams of you rushing to dealer for a new SRS, but crafty people manage to edit it by hands

The old IBM mainframe wizards used to smack the bits directly with a wrench to set and unset them, so I'm not surprised.

Jokes aside, this means this SRS error will remain active until actual reprogramming of the EEPROM of the SRS module? I'm not bothered much unless this compromises my safety somehow.

Addendum

I have discovered that Sardine-CAN needs a lot of refactoring, currently channels are implemented but not used as they should be. Once a message is passed to my proxy and the car responds back, the corresponding message does not know where to go. In fact I discovered a nasty bug in the VTABLE, it was not being referenced correctly. Even after refactoring the code to find a reference to A protocol "handler", I discovered the channel could be prematurely closed and with it, all handler references.

And finally, how exactly do I safely open up my CEM-L? I am having a hard time pulling the little tabs on each side.
I managed to do it, it was a really frustrating job, I just hope I did not have any static electricity. as I touched some of the pins.

And after reading the first few pages of this thread, I must say I am even more impressed, the dedication, analysis, that downclocking the chip proved things...and that just 2-3 years ago one couldn't do all this at home is mind boggling.

[vtl]

The old IBM mainframe wizards used to smack the bits directly with a wrench to set and unset them, so I'm not surprised.

They also found an actual bug!

Jokes aside, this means this SRS error will remain active until actual reprogramming of the EEPROM of the SRS module? I'm not bothered much unless this compromises my safety somehow.

It is safe to drive. You can also replace SRS module with the same P/N from junk yard.

And finally, how exactly do I safely open up my CEM-L? I am having a hard time pulling the little tabs on each side.
I managed to do it, it was a really frustrating job, I just hope I did not have any static electricity. as I touched some of the pins.

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I mean

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It is still a miserable job, but at least the tabs and not re-locking all the time.

[prometey1982]

For some modules you should read errors before erase them. It works in such way for my TF80SC TCM module. If i'im trying to clear DTCs without reading then I get error.

[dikidera]

Good news. I managed to flash a modified map to the car.

Side effects are now the abs light is on and I have a stop immediately error(rough translation) with red triangle .

No limp mode.

The error disappeared after one drive cycle. Oddly enough with the throttle more open now I was still beat by a Skoda octavia. We raced from one stop light to the next . Car needs more power.

Addendum.
Car died. I had a bad headgasket, and the increased power blew the radiator.

[rkam]

Ouch!

[vtl]

Car died. I had a bad headgasket, and the increased power blew the radiator.

This is what happens when you crack your CEM at home! Same happened to me! Engine died! Leave CEM pins to the professionals! They have the tools and the expertise!

Rebuilding engine is fun...

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And so on...

[dikidera]

I don't intend to keep the current block. If I can only find a 2.0T, 2.3T or 2.4T5 I have some plans.

A question for the CEM guys. Do the CEMs with a config change support changing the car from N/A to a Turbo variant?

[matija0610]

I don't intend to keep the current block. If I can only find a 2.0T, 2.3T or 2.4T5 I have some plans.

A question for the CEM guys. Do the CEMs with a config change support changing the car from N/A to a Turbo variant?

Yes

[dikidera]

The explosion happened as follows. I revved the engine to 6500RPM and held it there for a few seconds whilst I logged the throttle angle opening, I noticed a shudder and then white smoke(which was just hot water evaporating. Upon further inspection, the radiator cracked at the upper hose because I have a bad headgasket, the exhaust gasses created too high of a pressure in the coolant system and bam.