Service Charging With Battery Charger:Vas5900
If software updates or flash campaigns/actions must be performed on a vehicle, a charger with at least 70 A must be used in order to avoid problems during software updates and flash campaigns/actions.
Battery Charger:VAS5903 . Refer to BATTERY CHARGER .
Battery Charger:VAS5908 . Refer to BATTERY CHARGER .
Risk of injury. Follow all Warnings and Safety Precautions. Refer to WARNINGS AND SAFETY PRECAUTIONS .
"Service charging" is not permitted for VW vehicles, because voltage surges can damage the on-board electronics.
If "Service charging" is still used, the battery must always be separated from the vehicle electrical system.
Batteries that have a light yellow visual indicator do not have to be tested or charged. Do not give a jump start.
There is a risk of explosion during testing, charging or jump starting.
These batteries must be replaced.
During the charging process, always set the operation mode corresponding with the battery. Refer to the :VAS5900 Operating Instructions!
"Service Charging" is suitable for:
- Wet batteries having a visual indicator which allows charging (visual indicator black or green).
The "Service charge (SERV)" mode is only used with sulfated batteries. The battery with voltages > 14.4 V is charged. A partial removal of the sulfation layer can result from this. Check the visual indicator after charging, immediately before the battery is used. Refer to VISUAL DISPLAY IN BATTERY COVER, CHECKING .
Special Tools And Workshop Equipment Required
- Battery Charger:VAS5900
The battery temperature must be at least 10 °C (50 °F).
-- Turn off the ignition and all electrical consumers.
-- Plug in the electrical system connector of the charger. The last selected mode is shown on the display. Refer to BATTERY CHARGER .
-- Select battery type using INFO .
The symbol -1- for "service charge of wet batteries" or the symbol -2- for "service charge of Gel/AGM batteries" is indicated in the display.
-- Set the capacity (Ah) of the battery to be charged with the corresponding button "Up" ↑ or "Down" ↓ .
-- Clamp the red charging clamp "+" to the positive battery terminal.
In the case of vehicles with a start/stop function and an installed Battery Monitoring Control Module -J367-, the black charging clamp "-" must be connected to the body ground. The start/stop system will malfunction if it is connected to the negative terminal on the battery.
-- Connect the black charging clamp "-" to the negative battery terminal.
The battery charger recognizes the nominal voltage of the connected battery (6 V, 12 V or 24 V) and begins the charging process automatically.
At a charge condition of approximately 80 - 85% of the battery voltage, charging unit begins the "Final-charging". The fourth bar is indicated on the display -1-. The battery is now ready to be used.
A successful "service charge" depends on the degree of sulfation on the battery.
Possible malfunctions and how they are handled:
- Displayed voltage does not match the nominal voltage:
-- Hold the appropriate button "Up" ↑ or "Down" ↓ until the charging process begins.
- Displayed battery voltage does not match the nominal voltage - the charging process has already begun:
-- Press START / STOP twice.
-- Hold the appropriate button "Up" ↑ or "Down" ↓ until the charging process begins.
- The charger does not recognize a battery, when the battery voltage is less than 2 V:
The display remains unchanged.
The set operating mode and Ampere-hours (Ah) are displayed.
End Battery Charging Process:
-- Press START / STOP .
-- Remove the black charging clamp "-" of the charger from the negative battery terminal.
-- Remove the red charging clamp "+" of the charger from the positive battery terminal.
-- Pull out the electrical system connector of the charger.