VW Passat repair+ 1. Ekspluatatsiiya of the car + 2. Maintenance + 3. Engines + 4. Cooling system + 5. Power supply system + 6. System of ignition + 7. Coupling + 8. Transmission + 9. Drive of forward wheels + 10. Suspension brackets + 11. Steering + 12. Brake system + 13. Wheels and tires + 14. Systems of heating, ventilation and conditioning - 15. Electric equipment + 15.1. Technical characteristics 15.2. Security measures during the work with electric equipment + 15.3. Detection of not closed chain + 15.4. Rechargeable battery + 15.5. Generator + 15.6. Starter 15.7. Block of safety locks and relay 15.8. Replacement of the lock of ignition + 15.9. Switches + 15:10. Combination of devices + 15:11. Internal lighting and lighter + 15:12. Headlights + 15:13. Screenwash 15:14. Windshield washers 15:15. Cleaner of back glass - 15:16. Central lock 15.16.1. Search of malfunctions in the vacuum and delivery highway 15.16.2. Vacuum and delivery pump 15.16.3. Activators of door locks + 15:17. Hatch + 16. Body + 17. Electric circuits 
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Repair Volkswagen Passat B3-B4/Passat B3-B4>> Electric equipment>> Central lock The system of the central lock is put in action by keys of opening of a door of the driver or passenger. At turn of a key the microswitch which is built in in the door handle becomes isolated and there is an operation of system. System of the central lock — pneumatic. The drive of activators on the fuel filter, on a back cover and on each of four doors is provided with compressed air. Microswitches in the door handle turn on the vacuum and delivery pump which is mounted in a luggage carrier. Locking and unlocking of activators happens at the influence of elevated pressure or vacuum created by the pump.
In case of refusal works of system at the serviceable pump leak in pipelines or malfunction of activators is the most probable cause.
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