Hey, I don't really know, my garage guy attached a meter to the battery, and it showed my battery to be only very slightly down, and he said that a good run (which it had today) should do the trick. Is that the sort of test you mean, i'm not great on car technology. Regards.

I would echo FP comments re the parameters. When my Civic was only 18 months old the S/S decided to stop working in November and came back to life in March when I was on the way to the dealer for a service where I had asked them to check it out. They checked it out anyway and said there was no fault. The same winter huff continued all the while I had it. Too much drain from ancillaries in winter to meet the percentage full charge parameter.

Even after a new battery at six years old gave the same result that winter.

On the other hand my current Golf is two years old and both winters I have had it, the S/S has worked flawlessly, lockdown mileage included. It will not operate occasionally but that is due to the usual transient conditions, such as needing to protect the turbo or allowing the aircon to operate.

in both cars I have tended to switch it off but when in use the Golf system feels more mechanically sympathetic than the Civic one.