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
   13.4. Safety locks
   13.5. Rules of care of the accumulator
   13.6. Check of the accumulator
   13.7. Accumulator charging
   13.8. Accumulator
   13.9. System of charging
   13:10. Generator
   13:11. Replacement of brushes of the generator and regulator of tension
   13:12. System of start of the engine
   13:13. Starter
   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
   13:23. Switches
   13:24. Radio receiver
   13:25. High-frequency loudspeakers
   13:26. Low-frequency loudspeakers
   13:27. Antenna
   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

13.6. Check of the accumulator


It is necessary to make check of density of electrolyte in the accumulator each 3 months to define load ability of the accumulator.

Check is made by the densitometer. When determining density of electrolyte it is necessary to consider accumulator temperature. At a temperature of electrolyte below 15 °C on everyone 10 ° less than this temperature subtract value 0.007 from the measured density. For everyone 10 ° over 15 ° add 0.007.

Electrolyte density in the accumulator has to be in the following limits:
It is below 25 °C
It is above 25 °C
Full charge
1.270 – 1.290
1.210 – 1.230
Charging for 70%
1.230 – 1.250
1.170 – 1.190
1.110 – 1.130
1.050 – 1.070

Measure density of electrolyte in each can. The difference in density 0.04 or more between two any banks indicates loss of electrolyte or sulphation of plates.

If electrolyte density between two any banks differs more, than at 0:04 the accumulator is subject to replacement. If density of electrolyte is lower demanded, but identical in all banks, the accumulator needs to be charged.

In case of use of the unattended accumulator the state аккумулято ра can be checked only the voltmeter. In accumulators with the built-in indicator of degree of state of charge the condition of the accumulator is determined by color of the indicator. Green color of the indicator corresponds to a full charge of the accumulator. Black color of the indicator indicates the need of accumulator charging. Blue color of the indicator testifies to the low level of electrolyte in the accumulator.