Volkswagen Golf Quiz
Electrical system, general information

Charging battery in support mode with battery charger -VAS 5900-

In this manual: Electrical system, general information
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~2min read

General notes:

The support mode provides the onboard supply with power when the battery is removed or disconnected.

For further information, refer to the → operating manual VAS 5900.

The support mode is suitable in the following situations:

Support mode of onboard supplies without installed battery

Power conservation when renewing the battery

Ancillaries test without battery

WARNING

Danger of injury! Observe warning notices and safety regulations → Chapter!
WARNING It is not permissible to test or charge batteries whose magic eye shows light yellow. Do not slave/jump start the vehicle!

Danger of explosion when checking and charging or slave/jump starting.

These batteries must be renewed.
  • Switch off ignition and all electrical consumers.
Caution The terminal polarity protection in operating mode “charging totally discharged batteries/support mode” is not active. Connect battery charger terminal clamps correctly to battery terminals.

It can cause sparks through a short-circuit.

Danger of explosion

Ensure charger terminal clamps are seated securely.

Do not press START / STOP button when charger unit cables are connected incorrectly. The charger unit may be damaged.
  • Remove battery.
  • Connect charger plug to battery charger. The last selected operating mode will appear on display → Chapter.
Caution When battery is removed, ensure there is no contact between terminal clamp connected to positive clamp and body earth. Also ensure there is no contact between battery clamps.
  • Connect red terminal clamp “+” to positive terminal of vehicle.
Note In vehicles with start/stop function and battery monitor control unit -J367- fitted, black terminal clamp must be connected to body earth. Connecting it to battery negative terminal will cause start/stop system to malfunction.
  • Connect black terminal clamp “+” to negative terminal of vehicle.
  • Press START / STOP for approx. 5 seconds. The menu “charging totally discharged batteries/support mode” will be activated.
  • Press respective button “Up”↑ or “Down”↓ to set respective battery voltage (6 V, 12 V or 24 V).
Note If a button is not pressed within 5 seconds the charger will return to the main menu (select operating mode).
  • Confirm the selected battery voltage with START / STOP.

Then follows the enquiry for "is charger cable terminal polarity correct".

  • Check polarity of charger unit cables.
  • Confirm polarity of charger unit cables with START / STOP.

The battery charger starts with support mode.

End battery support mode:

  • Press START / STOP.
  • Disconnect black terminal clamp “-” of charger unit from negative terminal of vehicle.
  • Disconnect red terminal clamp “+” of charger unit from positive terminal of vehicle.
  • Pull charger plug out of battery charger.

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