Removing and installing leadthrough for refrigerant lines into luggage compartment, vehicles with high-voltage system — AUDI

🧭 Before you start

Fits: Audi A6/A7 C7 (4G, 2011–2018); platform code 4X

• Opens: refrigerant (A/C)

📋 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 the engine compartment, visually inspect the 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. — Discharge refrigerant circuit Air conditioner with refrigerant R134a87Refrigerant circuit.
2. Remove bolts (2 and 4) and detach refrigerant lines (1 and 3) from underbody (vehicle floor).
3. Seal off open lines and connections with clean plugs from engine bung setVAS 6122.
4. Remove luggage compartment floor General body repairs, interior70Luggage compartment trim panels; Exploded view - luggage compartment floor.
5. Remove bolts (1 and 3) and detach refrigerant lines (2 and 4).

6. Seal off open lines and connections with clean plugs from engine bung setVAS 6122.
7. Unscrew nuts (arrows) and detach leadthrough for refrigerant lines (1). [Note: If seal in leadthrough is damaged, apply silicone adhesive sealantD 176 001 A3 or similar at this location Electronic parts catalogue.The bonding surface must be clean and free from grease when applying the silicone adhesive sealant.Observe fitting instructions for O-rings .After attaching, check routing of refrigerant lines. They must be inserted in brackets provided and should not make contact with other components.]
8. Install refrigerant lines to battery cooling module on rear of underbody (vehicle floor) .
9. Install refrigerant lines to battery cooling module in luggage compartment .
10. Evacuate and charge refrigerant circuit Air conditioner with refrigerant R134a87Refrigerant circuit.
11. Re-install remaining components (removed earlier).
12. For electrical connections and routing, refer to .
13. Switch on ignition.
14. As a final step, interrogate event memory and erase any entries displayed ("“Guided Fault Finding”").
15. Start up air conditioner after charging refrigerant circuit . [Note: Also observe notes on starting up air conditioner after charging Air conditioner with refrigerant R134a87General notes on air conditioning systems.]

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