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♦ Commercially available hydrometer
– Check the electrolyte level of the battery
⇒ page 7
.
– Switch off the ignition and all electrical consumers.
– If fitted, remove the protective foil on the cell sealing plug.
Note
The foil with the warning notices must remain on the battery.
– Remove cell sealing plugs.
– Draw electrolyte off a cell using a hydrometer until the float
swims unhindered.
The electrolyte density is determined by the float position in the
battery electrolyte. The value can be read from the float scale.
Electrolyte density
Charge
Voltage
1.28 g/cm
3
100 %
12,7 V
1,21 g/cm
3
60 %
12,3 V
1,18 g/cm
3
40 %
12,1 V
1,10 g/cm
3
0 %
11,7 V
Note
Checking electrolyte density directly after topping up with distilled
water will lead to erroneous results. Check electrolyte density only
after charging the battery.
– Check the cell sealing plugs and the O-ring seals for damage.
Damaged parts must be replaced.
– Seal the cells with the cell sealing plugs.
Jetta 2005 ➤ , Bora 2006 ➤
Electrical System - Edition 05.2005
2. Checking battery
9
