Coding seems ok then..could be not enough distance driven as it needs to learn the new battery to give out the SOC ...
Update:
After a weekend driving (50 miles and 80 minutes), the SOC indicator is still on "---".
During the weekend I've also been browsing the forums for info, and I've found that the manufacturer coding I've made is wrong...as a matter of fact, the only 'accepted' values are the following:
5DO = JFF/Boading
TU3 = Exide
MLA = Moll
JCB = JCI/JCB
VA0 (or VAO) = Varta
UM5 = Akuma
BA2 = Banner
Obviously Yuasa hasn't got a vendor code in the BCM of VW, and therefore it's adviced to leave it on VA0 (or VAO), since apparently that setting always returns a "battery OK" status in the OEM log. Also if apparently it's ininfluent, I may have to recode the manufacturer value, and change the serial again to tell the BCM: "start from scratch". All other settings seem to be ok.
There is also another possibility: browsing around the forums, I've read that the 'SOC' feature has been 'killed' by VW on Golf MY2016 (from May 2015 to May 2016...mine was 1st registered on March 2016). but I don't know how reliable is that piece of info...and honestly doesn't make much sense to me: the module J367 is there anyway in my start/stop car, so I can't see any cost saving in 'blocking a feature', when the associated hardware is already there, and I guess it's main function is exactly to monitor the state of charge of the starter battery...
Just out of my curiosity: is SOC working on your Golf, and which year is your car, if I'm allowed to ask?
Ultimately, I've also learned about the "BEM code" batteries, and I may possibly go for one of them next time, since they are properly "accepted" by the BCM (they are "pre-set" models). No need to buy from VW of course, Varta is an excellent brand (...after Yuasa) in my experience, and produces BEM compatible batteries.
These are VW pre-sets in the BCM:
Battery BEM Code Ah Crank Type
=================================
8K0 915 105C......................70 340 Conv
8k0 915 105D......................80 380 Conv
8k0 915 105F......................110 520 Conv
4f0 915 10B..........................80 380 Conv
4f0 915 10C..........................95 450 Conv
4f0 915 10D.........................110 520 Conv
4f0 915 10E...........................92 520 AGM
7P0 915 10............................68 380 AGM
7P0 915 10A.........................75 420 AGM
7P0 915 10D........................105 580 AGM
1S0 915 10A.........................59 320 EFB
5TA 915 10B.........................70 420 EFB+
6R0 915 10B^......................69 360 EFB
3D0 915 10G^.....................85 480 AGM
3D0 915 10H........................75 420 AGM