Removing and installing fuse holder FSF in luggage compartment - vehicles up to model year 2013 and all vehicles with high-voltage system — AUDI

🧭 Before you start

Fits: Audi A8 D4 (4H, 2010–2017)

Don't miss

• Mark electrical wiring (2) and (3) for re-installation and unbolt (arrows).
• Exact contact assignment of fuse holder F in luggage compartment can be found in applicable current flow diagram .

📋 Procedure

1. ⚠ Risk of fatal injury if high-voltage components are damaged.Observe the following when working in the vicinity of high-voltage components or wiring:It is not permitted to use cutting or forming tools, other sharp-edged tools or heat sources such as welding, brazing, soldering, hot air or thermal bonding equipment.Before starting work, visually inspect the high-voltage components in the areas involved.Before working in engine compartment, visually inspect power and control electronics for electric driveJX1, electric drive motor V141, air conditioner compressor V470 and high-voltage wiring. Before working on the vehicle underbody, visually inspect the high-voltage wiring and covers. Before working on the rear section of the vehicle, visually inspect the high-voltage wiring and the electro-box with the maintenance connector for high-voltage system TW . Visually inspect all potential equalisation lines.Check the following when making the visual inspection:There must be no external damage on any component. The insulation of the high-voltage wiring and potential equalisation lines must not be damaged. There must be no unusual deformation of the high-voltage wiring. All high-voltage components must be identified by a red warning sticker. — De-energise high-voltage system Electrical system, hybrid93De-energising high-voltage system.
2. Disconnect earth cable from battery with ignition switched off: vehicles without high-voltage system , vehicles with high-voltage system .
3. Remove retaining frame for control units .
4. Release retaining spring (5)(arrow) and pull parking aid control unit J446(item 4) out of retaining frame and place to one side with wiring (1 … 3) still connected.
5. Release retaining clip (arrow) and pull data bus diagnostic interface J533(item 2) out of retaining frame and place to one side with wiring (1) and (3) still connected.

6. Release retaining clip and press off additional fuse holder.
7. Release retaining clips to pull relay (1) and control units (2) out of relay carriers.
8. Disconnect electrical wiring (3, 4, 5).
9. Move clear electrical wiring harness at fuse holder F.
10. Remove nuts (arrows).
11. Remove mounting for 46-pin connector T46.
12. Release retaining clip in direction of (arrow) and press fuse carrier (2) out of fuse holder F (item 1) towards rear.
13. Move clear wiring harness (left-side) and swivel fuse holder F (item 1) towards rear.
14. Mark electrical wiring (2) and (3) for re-installation and unbolt (arrows).
15. Remove fuse holder F. [Note: Exact contact assignment of fuse holder F in luggage compartment can be found in applicable current flow diagram .]
16. Install mounting for 46-pin connector T46.
17. Install data bus diagnostic interface J533.
18. Install parking aid control unit J446.
19. Install retaining frame for control units .
20. Connect battery. Steps required: vehicles without high-voltage system , vehicles with high-voltage system .
21. Re-install the remaining components that were previously removed.
22. Re-energise power supply of high-voltage system Electrical system, hybrid93Re-energising high-voltage system. [Note: Re-energising high-voltage system:Connect vehicle diagnostic testerSelect Guided Fault Finding modeUsing the Go to button, select the following menu options in succession:Function/component selectionBodyElectrical systemSelf-diagnosis-compatible systems8C - Hybrid battery management -J8408C - Hybrid battery management, functions51 - Re-energise high-voltage system (Rep. gr. 93)]

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