Sequence of works
1. First, find out which part of the system is faulty: electrical or pneumatic. To do this, listen to see if the pump turns on at the back when you turn the key or press the remote control button.
2. If the pump does not work, check the power supply. The pump may work when closed from another place. This indicates the possibility of a failure of the corresponding switch contact or disconnection of its wiring connection.
3. If the pump works but does not lock, the system is not sealed. Perhaps a hose has come loose somewhere or a crack has appeared in the membrane of one of the drive mechanisms.
4. To easily determine the location of the leak, remove all the floor mats from the interior and remove the contact connectors of the hoses leading to the door mechanisms one by one. At the same time, close the hose connection in the direction of the pump.
5. If the blocking suddenly works, the leak should be searched for in the circuit that was just disconnected.
6. If the lock does not work on one door, check the free play of the lock drive mechanism. On the fuel filler flap mechanism, check the free play of the locking pin in the guide sleeve.