If the vehicle has been switched off for a lengthy period of time (longer than 68 minutes), the following Check Control message appears the next time the ignition or the engine is switched on: “Vehicle Battery! Increased Battery Discharge when engine off”. At the same time, the yellow lifting symbol in the instrument cluster lights up.
Retrofitted electrical after-market equipment (e.g., hands-free systems, navigation systems, GPS or entertainment systems) may have been incorrectly connected to Terminal 30, Terminal 30g-f or directly to the battery.
Among other variables, the intelligent battery sensor (IBS) regularly monitors the battery’s discharge current while the vehicle is off. The measures values are transmitted to the DME/DDE through the bit-serial data interface (BSD).
If the measured off-load current exceeds a value of 80 mA once Terminal R is switched on after 68 minutes , the engine management system outputs the CC message “Vehicle Battery! Increased Battery Discharge” the next time Terminal 15 is switched on. This happens regardless of the battery state of charge.
Only install equipment or accessories which have been approved by BMW. Equipment or accessories must strictly only be connected to Terminal 15 or Terminal 30g, unless otherwise specified in the installation instructions of the BMW retrofit kit.
In the event of the situation described above, check the vehicle for non-approved installations and ask the customer whether components have been retrofitted.
-Check control messages.