Severely Discharged Battery, Charging With Battery Charger:Vas5903
Special Tools And Workshop Equipment Required
- Battery Charger:VAS5903
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 .
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.
- The polarity protection of the charger clamps is not active in the operation mode "charging severely discharged batteries/Support mode". Connect the charger clamps to the battery terminal clamps correctly according to polarity!
- During the charging process, always set the operation mode corresponding with the battery. Refer to the :VAS5903 Operating Instructions!
- The severely discharged battery is not recognized by the charger SEVERELY DISCHARGED BATTERIES .
- Do not press the START / STOP button when battery cables are connected incorrectly. The charger can be damaged.
It is not possible for the :VAS5903 to automatically detect batteries with a voltage under 2 Volts.
Observe the notes. Refer to SEVERELY DISCHARGED BATTERIES .
Severely discharged batteries in vehicles must be replaced prior to delivery. Pre-existing damage cannot be ruled out.
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 operation mode is shown on the display. Refer to BATTERY CHARGER .
-- Select applicable 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.
-- Press START / STOP for approximately 5 seconds. The menu item "Charging severely discharged batteries/Support mode" is activated.
-- Press the corresponding button "Up" ↑ or "Down" ↓ , to set the respective battery voltage (6 V, 12 V or 24 V).
If no button is touched within five seconds, the battery charger will return to the main menu (operating mode selection).
-- Confirm the selected battery voltage by pressing the START / STOP button.
Then the inquiry about the correct polarity of the charging clamps is made.
-- Verify that the charger clamps are connected to the correct polarity.
-- Confirm that the charger clamps are connected to the correct terminals by pressing START / STOP .
The charger begins charging the severely discharged battery.
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.