Audi A4 Owners & Service Manuals

Audi A4: Battery Charger -VAS5095A-

  WARNING

Risk of injury. Follow all warning messages and safety precautions. Refer to → Chapter "Warnings and Safety Precautions".

In order to prevent damage to the Battery -A- or vehicle, observe the battery type information. Refer to → Chapter "Battery Types".

  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 charge current cannot be read on the Battery Charger -VAS5095A-. The charge current must be measured externally with a current probe (Test Instrument Set - Current Clamp - 100A -VAS6356/4A-).
  • Observe the Battery Charger -VAS5095A- Operating Instructions.
  • Battery Charger -VAS5095A- device description. Refer to → Chapter "Battery Charger -VAS5095A- Device Description".
  • Charge the Battery -A-. Refer to → Chapter "Battery, Charging with Battery Charger -VAS5095A-".
  • Severely discharged Battery -A-, charging. Refer to → Chapter "Severely Discharged Battery, Charging with Battery Charger -VAS5095A-".
  • Support mode. Refer to → Chapter "Battery Charger -VAS5095A- Support Mode".
  • Buffer mode/maintenance charging. Refer to → Chapter "Battery Charger -VAS5095A- Maintenance Charging".

Battery Charger -VAS5095A- Device Description

The Battery Charger -VAS5095A- is designed to charge all 12 V Batteries -A- in the VW group.

The battery is charged without amperage or voltage surges. Thereby the on-board electronics will not be affected. It is not necessary to remove the Battery -A- from the vehicle or be disconnected from the electrical system during charging.

Battery Charger -VAS5095A-

Battery Charger -VAS5095A-

1 - ON/OFF-Switch (0 = OFF)

2 - Charge current display (I greater than 12 A)

3 - Battery -A- charge current display, partially charged (greater than 90%)

4 - Maintenance charging, lights up green when the Battery -A- is charged

5 - Interference indicator

6 - Support mode indicator

7 - Support mode/normal mode selector switch

8 - Charge cable: red charging clamp (+), black charging clamp (-)

9 - Battery type change switch (on the bottom of the unit)

Battery, Charging with Battery Charger -VAS5095A-

  WARNING

Risk of injury. Follow all warning messages and safety precautions. Refer to → Chapter "Warnings and Safety Precautions".

Special tools and workshop equipment required

  • Battery Charger -VAS5095A-

  Caution

While charging, always set the battery type to 2.4 V/C (Volts/Cell)! This applies to all Batteries -A-.

  Note

The Battery -A- temperature must be at least 10 ºC.

  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.

Procedure

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

- Check the battery type setting on the battery type switch. Refer to → Chapter "Battery Charger -VAS5095A- Device Description". The battery type switch must be set to 2.4V/C (Volts/Cell).

- 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.

- Switch on the Battery Charger -VAS5095A-. Refer to → Chapter "Battery Charger -VAS5095A- Device Description".

Charge current displays. Refer to → Fig. " Battery Charger -VAS5095A- "-2- and -3- light up yellow. The Battery -A- is partially charged (approximately 90 %) when only the yellow LED -3- is on.

If the green LED. Refer to → Fig. " Battery Charger -VAS5095A- "-4- is also on, then the Battery Charger -VAS5095A- has switched to maintenance charging. The Battery -A- is charged.

- Switch off the Battery Charger -VAS5095A-. Refer to → Chapter "Battery Charger -VAS5095A- Device Description".

- Remove the charging clamps from the battery terminals.

Severely Discharged Battery, Charging with Battery Charger -VAS5095A-

  WARNING

Risk of injury. Follow all warning messages and safety precautions. Refer to → Chapter "Warnings and Safety Precautions".

The Battery Charger -VAS5095A- automatically detects severely discharged Batteries -A- and starts the charging process conservatively with a low charge current. The charge current is automatically adjusted to the battery charge state.

  Note

  • For information in the chapter. Refer to → Chapter "Severely Discharged Batteries".
  • The battery voltage must be at least 0.6 V!
  • Severely discharged Batteries -A- in vehicles must be replaced prior to delivery. Pre-existing damage cannot be ruled out.

  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.

Procedure

- Charge the Battery -A-. Refer to → Chapter "Battery, Charging with Battery Charger -VAS5095A-".

Battery Charger -VAS5095A- Support Mode

General Information

The support mode provides the vehicle electrical system with voltage when the Battery -A- is removed or disconnected.

For more information. Refer to the Battery Charger -VAS5095A- Operating Instructions.

The support mode is used for the following situations:

  • Vehicle electrical system support mode with the Battery -A- not installed
  • Maintaining the voltage when the battery is being replaced
  • Systems test without the Battery -A-

  WARNING

Risk of injury. Follow all warning messages and safety precautions. Refer to → Chapter "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.

Special tools and workshop equipment required

  • Battery Charger -VAS5095A-

Procedure

  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 charging clamp connections are secure.

- Remove the Battery -A-. Refer to → Electrical Equipment; Rep. Gr.27; Battery; Battery, Removing and Installing.

  Caution

Whenever the Battery -A- 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.

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

  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.

- Attach the black charging clamp (-) to the vehicle battery negative terminal.

- Check the setting for the support mode/standard operation switch. Refer to → Chapter "Battery Charger -VAS5095A- Device Description". It must be set to "support mode".

- Check correct polarity connection of charger clamps.

- Switch on the Battery Charger -VAS5095A-. Refer to → Chapter "Battery Charger -VAS5095A- Device Description".

The Battery Charger -VAS5095A- starts the support mode.

End the Battery Support Mode

- Switch off the Battery Charger -VAS5095A-. Refer to → Chapter "Battery Charger -VAS5095A- Device Description".

- Remove the charging clamps from the battery terminals.

- Disconnect the Battery Charger -VAS5095A- from the power.

Battery Charger -VAS5095A- Maintenance Charging

  WARNING

Risk of injury. Follow all warning messages and safety precautions. Refer to → Chapter "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.

In maintenance charging, the Battery Charger -VAS5095A- provides safe charging and preserves the charge of the Battery -A-.

Procedure

- Proceed as if charging the Battery -A-. Refer to → Chapter "Battery, Charging with Battery Charger -VAS5095A-".

If the Battery -A- is discharged by an electrical consumer during maintenance charging, the Battery Charger -VAS5095A- automatically supplies the appropriate charge.

Maintenance charging can be performed without time restrictions. The Battery -A- can be used constantly.

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