Battery, 48 V -A6-, REMOVING AND INSTALLING, 0K4 AND VH2: Installing

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.

Courtesy of AUDI OF AMERICA, LLC

Install in reverse order of removal and Note The Following:

-- When the ignition and electrical equipment are switched off, connect the battery in the following sequence:

-- First connect the battery positive cable terminal clamp -3- to the battery positive terminal "+" by hand and tighten the nut.

-- Connect the battery ground cable terminal clamp -1- to the battery negative terminal "-" by hand and tighten the nut.

-- Attach the caps until they engage audibly.

-- Connect the connector -2-.

-- Check the battery for secure fit after installation.

-- Install the Battery -A-. Refer to Battery -A-, REMOVING AND INSTALLING, 0K4 AND VH2 .

-- If the Battery, 48 V -A6- was replaced, the new Battery, 48 V -A6- must be adapted.

Procedure

-- Connect the Vehicle Diagnostic Tester.

-- 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
0021 - 48V battery management -A6-
0021 - 48V battery management, functions
0021 - Replacing control module (Battery, 48 V -A6-)

-- Start the selected program and follow the instructions on the Vehicle Diagnostic Tester display.