Support Mode

Battery Charger VAS 5903

CAUTION!
Risk of injury. Observe warning notes and safety precautions => [ Dangers When Working with Batteries ] Dangers When Working with Batteries!

CAUTION!
Do not check or charge a battery 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.

The battery must be replaced.

• Refer to the Operating Instructions that came with the Battery Charger (VAS 5903).

• Battery Charger (VAS 5903) unit description, refer to => [ Battery Charger VAS 5903 ] Battery Charger VAS 5903.

• Charge the battery, refer to => [ Battery, Charging ]. Battery, Charging

• Refresh charging, refer to => [ Refresh Charging ]. Refresh Charging

• Charging a severely discharged battery, refer to => [ Severely Discharged Battery, Charging ]. Severely Discharged Battery, Charging

• Support mode, refer to=> [ Support Mode ].

• Maintenance charging, refer to => [ Maintenance Charging ]. Maintenance Charging

Support Mode

Special tools, testers and auxiliary items required

• Battery Charger (VAS 5903)

General Information

The support mode provides the vehicle electrical system with voltage with the battery is removed or disconnected.

For more information, read the Operating Instructions for the (VAS 5903).

The support mode is used for the following situations:

• Vehicle electrical system support mode with the battery not installed

• Maintaining the voltage when the battery is being replaced

• Testing without the battery

CAUTION!
Risk of injury. Observe warning notes and safety precautions => [ Dangers When Working with Batteries ] Dangers When Working with Batteries!

CAUTION!
Do not check or charge a battery 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.

The battery must be replaced.

Perform the following work:

- Turn off the ignition and all electrical consumers.

CAUTION!
• 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 terminals correctly according to polarity!

• It can result in sparks due to short circuit.

• This constitutes an explosion risk.

• Make sure the charger clamps are secure.

• Do not touch START/STOP if the charge clamps are connected incorrectly! The (VAS 5903) can be damaged.

- Remove the battery.

- Connect the (VAS 5903). The last selected operation mode is shown on the display => [ Battery Charger VAS 5903 ] Battery Charger VAS 5903.

CAUTION!
Whenever the battery is removed, be careful to prevent contact between the connected charge clamp on the positive terminal and the body ground. Likewise prevent contact between the battery terminals.

- Attach the red charging clamp (+) to the battery positive terminal.

• In the case of 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 if it is connected to the negative terminal on the battery.

- Connect the black charging clamp (-) to the negative terminal on the battery/negative connector.

- Press the START/STOP button for approximately 5 seconds. The menu selection "Charging severely discharged batteries/Support mode" is activated.

- Press the [Up Arrow] or [Down Arrow] button to set the battery voltage (6 V/ 12 V /24 V).

• If no button is touched within 5 seconds, the (VAS 5903) will return to the main menu (operating mode selection).

- Confirm selected battery voltage with START/STOP button.

Then the inquiry about the correct polarity of the charger clamps is made.

- Verify that the charger clamps are connected to the correct polarity.

- Confirm charging clips are connected to correct poles via START/STOP.

The (VAS 5903) begins with the battery support mode.

End the battery support mode

- Press START/STOP button.

- Remove the charger clamps from the battery terminals.

- Disconnect the (VAS 5903).