BATTERY, CHARGING WITH Battery Charger:VAS5903

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Special tools and workshop equipment required

Battery Charger:VAS5903

Fig 1: Battery Charger VAS5903
Courtesy of AUDI

WARNING:

Risk of injury. Follow all warning messages and safety precautions. Refer to WARNINGS AND SAFETY PRECAUTIONS .

WARNING:

Do not check or charge a Battery -A- when the visual indicator has >>no color or is bright yellow<<. Jump starting must not be used!

There is a risk of explosion during testing, charging or jump starting.

These Batteries -A- must be replaced.

NOTE:

The Battery -A- temperature must be at least 10 °C.

Procedure

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

-- Connect the Battery Charger:VAS5903 to the power supply. The last selected operation mode is shown on the display. Refer to Battery Charger .

-- Set the battery type with the INFO button.

Fig 2: Identifying Battery Charger Displays - Standard Charge (Wet Batteries Or AGM Batteries)

Courtesy of AUDI

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 Battery Charger:VAS5903 recognizes the nominal voltage of the connected Battery -A- (6 V/12 V/24 V) and begins the charging process automatically.

The Battery Charger:VAS5903 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 3: Charging Unit Display, Charge Condition Approx. 80 - 85 %

Courtesy of AUDI

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

Fig 4: Charging Unit Display, Charge Condition 100 %

Courtesy of AUDI

NOTE:

With the battery type "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 Battery Charger:VAS5903 switches to maintenance charging after 1 to 7 hours. To reach a 100% charge level, the Battery -A- should remain connected to the Battery Charger:VAS5903 .

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 rated voltage - 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 charger does not recognize a Battery -A-, when the battery voltage is less than 2 V:
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 Battery Charger:VAS5903 from the power.