Convenience Electrics; Control Unit For Power Management J644; Battery Condition; Advantages Of The Battery Condition - Audi A6 2005 - Electrics Service Training

Convenience electrics

Control unit for power management J644

The basic design of the control unit for power
management is the same as the control unit used in
the Audi A8 '03.
It is installed in the boot well, next to the battery.
This control unit has been adapted for use in the
Audi A6 '05 in that it now has revised software,
which shows the battery condition rather than the
battery charge level in the MMI display.
Furthermore, the diagnosis tester can be used to
read out history data, i.e. data relating to the
condition of the on-board power supply in the past.
Reference
The basic functions of the control unit for power
management J644 are described in the SSP 287.

Battery condition

The battery condition indicates how efficient the
battery is. The efficiency is determined from the
battery charge level and the ability to start.

Advantages of the battery condition:

– The cut-off stages can be allocated directly to the
battery condition.
– The messages in the central display of dash
panel insert J285 always appear for the same
battery condition reading.
– A 100 % display indicates that no cut-off stage
will be set the next time the engine is switched
off.
10
User Car
Battery condition
Systems
326_094
On-board manual
Maintenance
326_072