BATTERY, CHARGING WITH Battery Charger:VAS5900: Procedure

WARNING: This page is about a different car, the 2021 Audi S4 and 2021 Audi A4 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

-- Turn off the ignition and all electrical consumers and remove the ignition key.

-- Connect the :VAS5900 to the power supply. The last selected mode is shown on the display. Refer to Battery Charger .

-- Set the battery type with the INFO button.

Fig 1: Identifying Battery Type Symbols

Courtesy of AUDI OF AMERICA, LLC

The symbol -1- for "standard charge of wet batteries" or the symbol -2- for "standard charge of Gel/Absorbent Glass Mat (AGM) batteries" is indicated in the display.

-- Set the battery capacity (Ah) on the Battery -A- to be charged with the corresponding ↑ button or ↓ button.

-- Connect the red charge terminal (+) to the positive terminal of the Battery -A-.

NOTE:

On vehicles with a Start/Stop function and an installed Battery Monitoring Control Module -J367-, the black charge terminal (-) must be connected to the body ground. The Start/Stop system will malfunction when it is connected to the Battery -A- negative terminal.

-- Connect the black charge terminal (-) to the negative terminal of the Battery -A- /negative connector.

The :VAS5900 recognizes the nominal voltage of the connected Battery -A- (6 V/12 V/24 V) and begins the charging process automatically.

The :VAS5900 begins the "final charging" when the charge level is approximately 80 to 85%. The fourth bar is indicated on the display -1-. The Battery -A- is ready to be used.

Fig 2: Charging Unit Display, Charge Condition Approx. 80 - 85 %

Courtesy of AUDI OF AMERICA, LLC

With a charge status of 100%, all bars are indicated on the display -1-.

Fig 3: Charging Unit Display, Charge Condition 100 %

Courtesy of AUDI OF AMERICA, LLC

NOTE:

With the "standard charge", parallel operation of electrical consumers during the charging process is possible. The charging time is lengthened by this.

Depending on the battery type, the :VAS5900 switches to maintenance charging after 1 to 7 hours. To reach a 100% charge level, the Battery -A- should remain connected to the :VAS5900 .

Possible malfunctions and how they are handled

Displayed voltage does not match the nominal voltage:
-- Hold down the ↑ button or ↓ button until the charging process begins.
Displayed battery voltage does not match the nominal voltage - the charging process has already begun:
-- Press the START/STOP button two times.

-- Hold down the ↑ button or ↓ button until the charging process begins again.
The Battery Charger:VAS5900 does not recognize the Battery -A-, if the battery voltage is less than 2V:
The display remains unchanged.

The selected battery type and Ampere hours (Ah) are displayed.

Battery -A- charging, ending

-- Press the START/STOP -button.

-- Remove the charging clamps from the battery terminals.

-- Disconnect the :VAS5900 from the power.