Charging the Battery Using (VAS 5903)

Charging The Battery Using (VAS 5903)

Special tools, testers and auxiliary items required

• Battery Charger VAS 5903 (VAS 5903)

• Battery charger (VAS 5903) charges without current and voltage peaks. Batteries can therefore also be charged when installed. When doing this, heed the safety instructions. The devices provide an assistance mode in which they provide supply for the circuits.

• When working on the electrical system with the electrical consumers temporarily switched on and for "Guided Fault Finding", the battery must be charged with a battery charger in assistance mode to prevent damage to the battery. Refer to=> [ Battery Support Mode With ] Battery Support Mode With (VAS 5903).

• 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.

Risk of explosion due to open flame, fire and smoking.

• On non-maintenance-free batteries, the sealing plugs must be installed tightly.

• Provide sufficient ventilation.

• A highly flammable gas forms when batteries are charged. Never enter rooms where batteries are being charged carrying an open flame or while smoking.

• Follow the battery charger and battery manufacturer safety requirements.

• Rapid-charging batteries, refer to=> [ Rapid Charging The Battery, Vehicles Without Battery Monitoring Control Module (J367) Or Energy Management Control Module (J644) ] Rapid Charging the Battery, Vehicles Without Battery Monitoring Control Module (J367) or Energy Management Control Module J644.

Risk of explosion on discharged battery with visual indicator.

• If the visual indicator has no color or is light yellow, the battery may not be tested or charged. Jump starting must not be used! There is a risk of explosion during testing, charging or jump starting. The battery must be replaced.

Risk of damaging AGM batteries.

• AGM batteries must be protected from over voltage.

- Switch off ignition and remove ignition key.

- Turn off all electrical consumers.

- Perform the battery charging prep work.

• In vehicles without a Battery monitoring control module (J367) or Energy management control module (J644) , the battery charger clamps can be connected to the battery terminals or the positive and ground terminals in the engine compartment.

• In vehicles with a Battery monitoring control module (J367) or Energy management control module (J644) , the black charger clamp "-" must not be connected to the battery negative terminal but to the ground terminal in the engine compartment or the ground pin of the energy management control module (J644).

- After connecting the charging clamps, connect the battery charger electrical system connector.

- Switch the charger on.

- If necessary, adjust the charge current according to the battery capacity.

• Current should be 10% of the battery capacity (with a 60 Ah battery, about 6 Ah).

- When the battery is fully charged, refer to Battery charger operating instructions, disconnect the battery charger clamps "+" and "--" from the battery.

- Disconnect the battery charger electrical system connector.