Current Draw Test

Current Draw Test

Special tools, testers and auxiliary items required

• Battery Charger VAS 5903 (VAS 5903)

Maintenance-free batteries must not be opened. Otherwise, the warranty is voided.

It is not possible to check the battery using "Guided Fault Finding" during the following procedure, even if the vehicle has a battery monitoring control module (J367) :

• Audi A3 from MY 04 (8P)

• Audi TT from My 07 (8J)

• Audi R8 from MY 07 (42)

By checking a battery's current draw capacity during charging, a decision can be quickly made as to whether a partially or exhaustively discharged battery, refer to=> [ Exhaustively Discharged Battery ] Exhaustively Discharged Battery can be made usable again by recharging or if it must be replaced.

• When charging with the battery charger, (VAS 5903) , displays the current draw on the device.

• For more information regarding the battery charger, refer to the Operating Instructions that came with the charger.

Procedure

• The battery temperature must be at least +10° C (50 °F).

• The battery charger must be able to deliver at least 30 amps (A), as with the battery charger (VAS 5903).

• Battery charger connected and switched on.

- Measure the battery charge current after 5 minutes of charging.

• Specified value: The charge current must be higher than 10% of the nominal capacity.

• Example: Charge current on a 60 Ah battery after 5 minutes of charging: greater than 6 A.

- If the target value is reached, proceed with the charging operation until the battery is fully charged.

- Then test the battery with the battery tester:

• With the Battery tester (VAS 6161) without waiting period, refer to=> [ Battery Test Using Battery Tester ] Battery Test Using Battery Tester (VAS 6161).

- If the specified value is not met, replace the battery.

• If the battery must be replaced, follow the disposal regulations. Refer to=> [ Pollution risk. ] Lead-Acid Battery Warnings and Safety Precautions.