Auxiliary Battery -A1-, VISUAL INSPECTION AND CLASSIFICATION: Procedure
WARNING: This page is about a different car, the 2021 Audi S4 and 2021 Audi A4 Quattro. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
There is danger of a health risk due to poisonous dust and fluids.
- Never work on a lithium-ion battery with a short circuit.
CAUTION:
There is a risk of burns due to a hot lithium-ion battery.
It is possible to burn hands.
- Do not touch a hot battery.
- Wear safety gloves.
Check the Auxiliary Battery -A1- for:
- Tears in Auxiliary Battery -A1- housing.
- Deformation of the Auxiliary Battery -A1- housing.
- Changes in color due to the effects of temperature and housing discoloration
- Electrolyte leakage.
- Contact damage.
- If the information and warning label is present and readable.
- Corrosion damage.
-- A classification must be given to the Auxiliary Battery -A1- after the visual inspection.
-- Connect the Vehicle Diagnostic Tester.
- With the Auxiliary Battery -A1- removed, use the :VAS5581 with the :VAS5581/7 .
- Connect the black terminal on the :VAS5581/7 to the negative terminal on the Auxiliary Battery -A1-.
- The CAN bus terminating resistor on the :VAS5581 is preset to 120 Ohm and must not be changed.
-- Select the Diagnostic mode and start the diagnosis.
-- Select the Test plan tab.
-- Select the Select individual test button and select the following tree structure consecutively:
- Diagnostic-capable systems
- 0080 - Battery regulation, auxiliary storage 1 -A1 (12V Li-Ion)
- 0080 - Battery regulation, auxiliary storage 1 (12V Li-Ion), functions
- 0080 - Classification, A1 - Auxiliary Battery
-- Start the selected program and follow the instructions on the Vehicle Diagnostic Tester display.