Battery, Checking, Vehicles With Battery Monitoring Control Module J367, Energy Management Control Module J644 And Data Bus On Board Diagnostic Interface J533

In certain model series the following is responsible for monitoring the electrical system: Energy Management Control Module -J644- or Battery Monitoring Control Module -J367- in connection with the Data Bus On Board Diagnostic Interface -J533- ; allocation, refer to appropriate Wiring Diagram. The battery test for these vehicles is performed during "Guided Fault Finding".
If the battery test is not possible with "Guided Fault Finding" due to a partially or exhaustively discharged battery, the battery can be quickly evaluated with the help of the "battery test via current draw".
Maintenance-free batteries must not be opened. Otherwise, the warranty is voided.

CAUTION:

It is not possible to check the battery using "Guided Fault Finding" through MY 2010 during the following procedure, even if the vehicle has a Battery Monitoring Control Module -J367- :

A3 from MY 2004 (8P)
TT from MY 2007 (8J)
R8 from My 2007 (42)

Battery test, refer to CHECKING THE BATTERY - VEHICLES WITHOUT A Battery Monitoring Control Module -J367- OR Energy Management Control Module -J644- .

WARNING: Risk of injury. Follow all warning messages and safety precautions, refer to WARNINGS AND SAFETY PRECAUTIONS .

Perform Tests in the Following Sequence:

-- Visual inspection, refer to VISUAL INSPECTION .

-- Check the visual indicator color display (if equipped), refer to VISUAL INDICATOR COLOR DISPLAY, CHECKING .

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.

-- Battery Test with Vehicle Diagnostic Tester refer to BATTERY TEST WITH Vehicle Diagnostic Tester .