Solenoid valve 1 N88

The CST machine switches completely normal, i.e. to the cold start morning 10km to the operation and back again.
When the emergency run comes in, then always when I stop to switch the R-speed or after re-driving after parking.
The error memory is stored as code 00258 "Short circuit after mass".
The solenoid valve N88 is controlled normally during the actuator diagnosis.

So, now the actual questions that I can't solve!

- Is the solenoid valve operated by the transmission control device during the control panel diagnosis?

- Why doesn't the malfunction occur during the diagnosis?

- Is an error immediately stored in the error memory during the diagnosis?

- The RLF says that the battery is switched while the ignition is switched on, must not be disconnected, because the STG can otherwise be damaged
Since Audi had already found out about this, could this hint not be more extensive if it would damage the solenoid valves?

- Is the N88 already "currented" in advance if the engine only runs on "P"?

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