Battery, removing and installing: Installing
NOTE:
- For optimum operation of Energy Management Control Module J644, the use of the battery indicated in the Parts Catalog is recommended.
- Only cycle-proof and leak-proof valve-regulated lead-acid batteries or AGM batteries according to standards "TL82506" (from December 1997) and "VW75073" (from August 2001) must be installed.
- Batteries from the Audi Parts Program have a bottom strip-adapter for adapting to different grip channels. Whether and how bottom strip-adapter is used, refer to operating instructions for battery.
- Insert battery into battery holder so that tab of rear battery holder - arrow - engages into cutout for battery clamping strip - 1 -.
- Battery must no longer be movable.
Fig 2: Identifying Cover, Ground Wire, B+ Wire, Central Venting System, Bolt, And Battery Retaining Bracket
- Tighten battery retaining bracket - 1 - using bolt - 2 -.
NOTE:
- The tab at the battery retaining bracket must engage in the recess at the battery clamping strip.
With ignition switched off and electrical components switched off, connect battery in the following sequence:
- First, connect terminal clamp - 3 - of positive wire to battery positive terminal "+" by hand and tighten nut.
- Connect terminal clamp - 5 - of ground (GND) wire to battery negative terminal "-" by hand and tighten nut.
- Connect hose - 6 - for central venting system, heed notes → Batteries with central gas venting .
- Close cover - 4 - above battery positive terminal.
- Check battery for proper seating after installation → Check battery for secure seating .
- Stop battery assistance mode at battery charger.
If the battery was not removed and installed in assistance mode, the following steps must be performed after reconnecting the battery:
- Activate automatic run-up and run-down of electric window regulators Owners manual.
- Synchronize secondary and additional keys to ensure remote control operation. To do so, insert key into ignition lock, switch the ignition on and off again and remove key.
- Check DTC memories of all control modules and erase DTCs "Undervoltage" if necessary.
NOTE:
- After re-connecting voltage supply, ESP indicator lamp can only go out after driving several meters.
If the battery was replaced, Energy Management Control Module J644 must be coded anew.
Tightening torques
| Component | Nm |
| Bolt at retaining bracket | 24 |
| Battery terminal to battery post | 7.5 |