Turn a key in situation "close" from the driver's party, all doors equipped with mechanical blocking have to be closed.
Turn a key in situation "open" from the driver's party, check that only the driver's door opened.
Once again turn a key in a driver's door in situation "openly" and detain him in this situation for 5 seconds, check that all doors opened.
If results of verification of items 1 and 2 satisfactory, then this operation as it should be.
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