SUPPORT MODE WITH Battery Charger:VAS5908: Notes
Special tools and workshop equipment required
If software updates or flash campaigns/actions are performed on a vehicle, a charger with at least 70A charging current must be used in order to avoid problems during software updates and flash campaigns/actions.
Battery Charger "VAS 5903". Refer to Battery Charger .
Battery Charger "VAS5908". Refer to Battery Charger .
The support mode (>>FSV mode<< external power supply) serves to supply the vehicle electrical system with voltage when the battery is disconnected or removed.
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
In >>FSV mode<< only a resistive load (electrical equipment) may be supplied.
>>FSV mode<< may not be used when the battery is connected.
Disconnect or remove the battery before using the >>FSV mode<<.
Performing Support Mode
-- Turn off the ignition and all electrical equipment and remove the key.
-- Remove the battery. Refer to BATTERY, REMOVING AND INSTALLING .
-- Switch the Battery Charger:VAS5908 on.
Always make sure that the red charging clamp does not make contact with the body ground.
Always make sure that the battery terminal clamps do not contact each other.
-- Connect the red charging clamp "+" to the vehicle battery positive terminal clamp.
On vehicles with a Start/Stop system and an installed Battery Monitoring Control Module -J367-, the black charge terminal "-" must be connected to the body ground.
When connecting to the battery negative terminal, the Battery Monitoring Control Module -J367- is bypassed. Malfunctions in the Start/Stop System may be the result.
-- On vehicles with a Start/Stop System, connect the black charging clamp "-" to the body ground.
-- On vehicles without a Start/Stop System, connect the black charging clamp "-" to the vehicle battery negative terminal clamp.
The Battery Charger:VAS5908 automatically adapts to the thresholds of power and voltage for the support mode.
If necessary, preset the different thresholds for power and voltage in the FSV menu. Refer to FSV Menu .
-- With the ←↓ buttons, select FSV MODE and confirm with the ENTER button.
Ending Support Mode
-- Switch the Battery Charger:VAS5908 off.
-- Disconnect the black charging clamp "-" on the battery charger from the vehicle battery negative terminal clamp.
-- Disconnect the red charging clamp "+" on the battery charger from the vehicle battery positive terminal clamp.
-- Remove the power supply plug.