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2
Checking battery
WARNING
Danger of injury! Observe warning notices and safety regula‐
tions
⇒ page 2
!
Caution
To prevent damage to the battery and vehicle, the following
should be observed concerning types of battery
⇒ page 1
.
2.1
Procedure when checking the battery
Carry out procedure in sequence as follows:
1.
Visual check
⇒ page 5
.
2.
Checking battery with a magic eye
⇒ page 6
or checking
a low maintenance battery
⇒ page 7
.
3.
Check no load voltage of battery
⇒ page 10
.
4.
Perform a battery load test using battery tester with printer
-VAS 5097 A-
⇒ page 12
.
2.2
Visual check
WARNING
Danger of injury! Observe warning notices and safety regula‐
tions
⇒ page 2
!
It is essential first to check the external condition, the terminals of
the battery and that the battery is seated securely visually before
performing more extensive tests.
Caution
♦ The battery will be damaged if the battery is not secured
correctly.
♦ Vibrations shorten the life of the battery, there is a danger
of an explosion, the cell plates may be damaged and the
securing plate may damage the battery housing.
♦ Check battery is securely seated, if necessary tighten se‐
curing bolt to specified torque setting.
⇒ page 36
♦ Whether the battery housing is damaged: Check whether the
battery housing is damaged. Electrolyte can leak out if the
housing is damaged. If battery acid leaks out, serious damage
to the vehicle could be caused. Treat areas of the vehicle af‐
fected by leaked battery acid immediately with acid neutraliser
or a soap solution.
♦ Whether the battery terminals (battery wiring/cable connec‐
tions) are damaged. Check whether the battery terminals (bat‐
tery wire connections) are damaged. The necessary contact
at the terminal clamps cannot be guaranteed if the terminals
are damaged. When connecting clamps to the terminals, tight‐
Jetta 2005 ➤ , Bora 2006 ➤
Electrical System - Edition 05.2005
2. Checking battery
5