You are a legend @T5-T6-Schnappi that worked and my car is working again 🙂

@Kurt1977 I think I'm getting old. 🤔

The official guide recommends cloning the software and than perform SRS configure. As your original module has a checksum error indicating corrupted software or a bad EEprom , cloning won't work.
You can try to just perform the SRS configure if you install a used module hoping the software is the same than in your original module or at least compatible with your car. If this doesn't work you will need an official VIDA subscription to perform a software reload, but this will only work if the software for the donor part is still present on the servers and if VIDA thinks the part number is somehow compatible with your car. Volvo has started to remove lots of softwares and part numbers for superseded/discontinued modules from their VIDA servers making software downloads impossible for those parts.

You can also try to contact some specialists for ecu repairs and ask them if they can fix your original module.

@Puppi

Hi, hat sich der Fehler bzw die Ursache in der Zwischenzeit aufgeklärt oder hast du (doch) mal versucht quer zu tauschen? Gab es noch weitere Symptome?

Mfg Tea

@330hpwagon I'm not sure if your car supports HDC. The official manuals mention HDC only from model years 2015.5 onward as this feature was officially introduced with the Cross Country models and is activated by default on these models only.
To use HDC you have to manually shift to 1st gear or R. You can't activate it when in D or above 7 km/h.
VIDA doesn't mention anything about specific hard- or software that has to be installed or that this function is only available from a specific structure week like other functions like ERS.
The DTCs in your BCM are also all yellow which means they are temporary/historic/not active while the others in red are permanent. The first one in the CEM is from LED bulbs at the license plate and can be ignored. The others should be the ones that you want to adress.

Why exactly do you even want to activate this function? I have a V60CC with this function and never felt the need to go downhill with less than 10 km/h.

@T5-T6-Schnappi it's working perfectly.Thank you!

@T5-T6-Schnappi Thanks for advice, i borrowed other cable and everything worked out. Also it works with different part/hardware numbers too( added picture). If it will be useful to anyone, it is enough to buy ETM by model year, the codes may differ.
3acef5e9-e8bc-48d1-8df4-3dad90aeb703-image.png

@MarkusC30T5 Manuals don't have a TCM. So all related wiring for that can be removed from the car.
You need to ask the Vdash support if they can provide the required ECM reload (manual software) for you, and also if the configuration change in the CEM can be unlocked/activated for you.
This will of course cost you some money.
You also need to crack the CEM pin to change the configuration.

@Jcm89 a flush every 10000 miles is a little bit over the top. Drain and refill at this intervall would be more than good enough to keep the transmission happy.

As for the torque limiter. 5-speed automatic is limited in the first two gears. 6-speed in first three gears, 8-speed has no limiter. This is done to reduce wear on the differential, drive shafts and several other parts, but also to have enough traction.
Some tuners offer to remove this limiter, but it has more negative than positive effects.

@VolvoAugust The only way to get the pin is on the bench. You won't get information how to actually do this in this forum. The guys that know how to do it, usually don't share their knowledge to the public.

Thank you so much for your answer! I was told that and it was werid when I saw the message in vdash.
I will contact the vdash support, maybe they can help me with this issue.

I would suspect a defect wheel speed sensor, corroded sensor ring at one of the wheel bearings, or low battery voltage.
Put the car on a lift and check the signals of all sensors with an oscilloscope. The sensors could still be working, but the sensor rings could miss one or more teeth which results in sending nonsense signals to the BCM.

@Cookie_69 wrong forum for such questions. Vdash won't be useful for any of your questions.
Engines with Bosch throttle body require a different ECM. Those ECMs are not compatible with your CEM, so you need another CEM and somehow adopt it to your car. And so on.... Absolutely not worth it. You will basically need to update your whole car to the electronics of a 2005+ Model.
Get the correct engine for your car, or scrap it and get a new car.

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Toujours pas de réponse dommage...

Hey, did you end up getting this sorted at all? I've recently acquired an XC70 P2 which is reading the same DD10 LIN Communication Fault. I haven't looked into the problem in too much detail but it's something I'm getting round to, if you did end up getting it sorted, any tips/things to check would be great 🙂

Thank you very much for the comprehensive explanation 🙂

@pvm I can't tell you if Vdash is capable to clone HCMs on SPAs. But you will see if this option is available in the clone menu. CEM pin shouldn't be required for this. Your ENET/DoIP adapter is perfect for software updates/cloning and recommended on SPAs. J2534 is only for older plattforms and also good for pin cracking on SPAs up to 2021.

You need a software update. Part number 32398268. Official VIDA subscription or trip to the dealer required. There is no other way to fix this.

@T5-T6-Schnappi Thanks for the advice. The error code I’m getting is P0420, related to the catalytic converter. My engine has recently undergone an overhaul, with the pistons replaced due to oil consumption. Since the rebuild, the engine doesn't behave like it used to— there’s a tingling sensation on the steering wheel, and it feels like I’m driving a diesel.

Besides the comfort issues, fuel consumption has increased to about 9.5L/100km (before the repair, I averaged 7.5L/100km). Now (20 000km after rebuild) I’m also getting errors related to the lambda sensors. I know that the mechanic unfortunately didn't assemble the engine according to the official Volvo procedure—they didn't use the required locking tools and just relied on timing marks. Therefore, I am certain the balance shafts are incorrectly installed, but I’m also worried about the timing and the VVT settings.

I also know that this car can be quite tolerant of certain issues... for instance, when I had a faulty PCV system, no error code appeared, even though the crankcase pressure was clearly compromised.

@T5-T6-Schnappi Thanks!