VW Passat B5
since 1996 release
Repair and operation of the car
Foltsvagen Passat B5
+ Maintenance instruction
+ 1. Maintenance
+ 2. Engines
+ 3. Cooling system
+ 4. Fuel system
+ 5. Engine management
+ 6. Exhaust system
+ 7. Transmission
+ 8. Running gear
+ 9. Steering
+ 10. Brake system
+ 11. Body
+ 12. Heating, ventilation
- 13. Electric equipment
13.2. General information
- 13.3. Electric chains
13.3.1. Detection of not closed chain
13.4. Safety locks
13.5. Rules of care of the accumulator
13.6. Check of the accumulator
13.7. Accumulator charging
13.9. System of charging
13:11. Replacement of brushes of the generator and regulator of tension
13:12. System of start of the engine
13:14. Traction relay of a starter
13:15. Replacement of bulbs of external lighting
13:16. Replacement of bulbs of internal lighting
13:17. Devices of external lighting
13:18. Executive engine of the proofreader of light of headlights
13:19. Adjustment of light of headlights
13:20. Gas-discharge lamps of headlights of passing beam
13:21. Combination of devices
13:22. Multipurpose switches of a steering column
13:24. Radio receiver
13:25. High-frequency loudspeakers
13:26. Low-frequency loudspeakers
13:28. Check of a heater of back glass
13:29. Windshield screen wiper engine
13:30. Engine of a screen wiper of back glass
13:31. Windscreen washer pump
13:32. System of the central blocking of locks
13:33. Main malfunctions of the generator
13:34. Main malfunctions of a starter
+ 13:35. Electric circuits
The usual electric chain consists of an electric element, switches, the relay, engines, protect tel, automatic switches, wires and sockets which connect an electric element to the accumulator and a body. For the help by search of sources of malfunction of system of electric equipment, at the end of the management schemes of electric equipment of the car are provided.
Before to try to define a malfunction source, in the beginning study the corresponding scheme of electric equipment for receiving idea of the elements established in this chain. The circle of possible sources of malfunction can be narrowed if to check functioning of other elements entering this chain. If several elements or chains vykholit out of operation at the same time, then the problem, obviously, consists in a safety lock, the general for these chains or elements, or contact with a body.
Electric problems are usually caused by the simple reasons, such as the weakened or rusted sockets, lack of contact with a body, the fused safety locks, the burned-through crossing point which melted ся or the faulty relay. Visually check a condition of all safety locks, wires and sockets in the failed chain before to start check of other elements. Use schemes of electric equipment for definition of what of trailer clips need to be checked for detection of a source of malfunction.
The main tools necessary for detection of a source of malfunction are the tester or the voltmeter (the bulb on 12 volts and couple of wires with probes on the ends, can be also used for conducting some checks); ohmmeter; the battery and a set of wires with probes, a cap puncture, it is desirable with the automatic switch or a safety lock which is used for a round of the checked wires or elements.
For detection of the reason of unreliable work any of elements (usually because of bad connection or pollution of contacts, or the damaged isolation), it is possible to carry out an inspection stirring of wires. It is necessary to shake a wire by a hand to check whether malfunction at the movement of a wire appears. Such metol it is possible to narrow a circle of possible sources of malfunction to any wire.
Along with problems because of bad connection of wires, two main types of malfunctions can take place in system of electric equipment – the opened chain or short circuit.
Problems with the opened chain appear as a result of break in electric equipment chain that interrupts course of current. The opened chain will cause shutdown of an element of electric equipment.
Problems with short circuit are caused by short circuit of the site of a chain that leads to leakage of current from other chain, usually directly on a body. Short circuit is usually caused by a rupture of isolation of wires that allows a wire to concern other wire or any grounded element, for example a body. Short circuit usually leads to burn-out of the corresponding safety lock.
Connect the second probe to connection in the checked chain, it is desirable for the next to the accumulator or protect лю. At the same time this site of a chain has to be energized from the accumulator if only the socket of connection to the accumulator does not carry current or the safety lock did not fuse (at the same time do not forget that some chains электрооборудо a vaniye join only at turn of a key in the ignition lock in a certain situation).
Include a chain, then connect the tester probe to connection, the next to the chain switch on the party of the checked element.
If tension is present (what the control bulb or indications of the voltmeter testifies to), it means that appreciate the site between the corresponding connection and the switch has no gaps.
Continue check of a chain in the same way, and after detection of the site on which there is no tension, it means that the rupture of a chain occurred between this point and a point of the previous check on which there was tension. The majority of problems of the opened chain are caused by the broken or weakened socket.
Remove corresponding protect a tel and connect probes of a tester or the voltmeter to safety lock plugs.
Include food in chains, at the same time do not forget that some chains of electric equipment join only at turn of a key in the ignition lock in a certain situation.
If tension is present (what the control bulb or indications of the voltmeter testifies to), it means that in a chain there is a short circuit.
If when conducting check there is no tension, however the safety lock still fuses at connection of that loading of a chain, it demonstrates failure of an element of loading.
For check of reliability of grounding of an element, it is necessary to switch-off the accumulator and to connect one of ohmmeter probes to reliably grounded element. Connect other probe to a pla wire to connection with a body which needs to be checked. Resistance shown by an ohmmeter has to be equal to zero; if is not present, check connection as follows.
If you assume lack of grounding, investigate connection and clear the site of a body and the plug of a wire (or the surface of grounding of an element) to pure metal. Carefully remove all traces of dirt, then by means of a knife peel all paint so that the reliable contact of two metal surfaces turned out. At assembly, reliably delay fastening of the socket; at connection of the plug of a wire, establish a washer with rough edges between the plug and a surface of a body for ensuring reliable connection. At connection, prevent emergence of corrosion in the future, having put a layer of vaseline or silicone lubricant.