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Volkswagen Workshop Service and Repair Manuals

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Checking the resting voltage of batteries (unused or stored vehicles) > < Check the resting current of the battery

Polo Mk4

Check the final battery charge
Check the final battery charge
  WARNING
Risk of injuries! Pay attention to the warning notes and security norms → Chapter.
  Note
Other available test equipment and tools may also be used. Refer to the → Special Tools and Workshop Equipment Catalogue.
   
Special tools and workshop equipment required
t  Vehicle diagnostic, testing and information system -VAS 5051A-
t  Vehicle diagnostic, testing and information system -VAS 5051B-
t  Amp clamp 50A -VAS 5051/9-
t  Amp Clamp -VAS 5051B/7-

Checking:
  Note
t  Prior to performing the test, calibrate the 50A amp clamp -VAS 5051/9- or later equipment.
t  There is no need to conenct the diagnostic cable to the 16-pin diagnostic connector -T16-.
   
–  Place the 50A amp clamp -VAS 5051/9- or later equipment onto the negative cable of the battery according to the arrow in the direction of the body.
–  Turn the vehicle on and await engine rotation to stabilize.
Verification result:
–  The current value should be positive, demonstrating that the vehicle is being charged by the alternator.
  Note
When turning on electrical consumers, the current should, at no time, be negative, which would demonstrate an failure in the charging of the battery by the alternator.
  Q00-10084

Checking the resting voltage of batteries (unused or stored vehicles) > < Check the resting current of the battery