Detaching and attaching air conditioner compressor at bracket (electrically driven) — AUDI

🧭 Before you start

Fits: Audi A5 (8T, 2007–2016), Audi Q5 (8R, 2008–2017), Audi A5 Cabriolet (8F), Audi A4 B8 (8K, 2007–2015); platform code 83

Don't miss

• (Item 1) can be disregarded.
• (Items 1, 4) can be ignored.
• If the air conditioner compressor cannot be swivelled far enough away from the engine, the compressor must be removed completely .
• Risk of damage to high-voltage system wire or refrigerant lines and hoses.Do not stretch, kink or bend refrigerant lines and hoses. — Fit bolts (A), (B) or (C).

🔩 Torque settings

Values can differ between engine variants — check the code stamped on your block.

ℹ️ Always cross-check the exact figure against your vehicle's factory manual before final tightening — a wrong torque can damage the engine. These values are extracted from workshop data and may not cover every variant or revision.

📋 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. — Switch off ignition.
2. De-energise high-voltage system Electrical system93De-energising high-voltage system. [Note: De-energising high-voltage system:Connect vehicle diagnostic testerSelect Guided Fault Finding modeUsing the Go to key, select the following menu items in successionFunction/component selectionBodyElectrical systemSelf-diagnosis compatible systems8C - Hybrid battery management -J8408C - Hybrid battery management, functions51 - De-energise high-voltage system (Rep. gr. 93)]
3. ⚠ High voltage can cause fatal injury.Danger of severe or fatal injuries from electric shock. The high-voltage system may only be de-energised by a suitably qualified person (Audi high-voltage technician). It must be definitely confirmed that the high-voltage system is de-energised. The system may only be de-energised using the vehicle diagnostic tester via "“Guided Fault Finding”". The qualified person (Audi high-voltage technician) confirms that the system is de-energised and uses the locking cap T40262 to ensure that the system cannot be re-energised. The ignition key and the maintenance connector for high-voltage system TW should then be stored in a safe place by the qualified person.The qualified person (Audi high-voltage technician) marks the vehicle by attaching the appropriate warning signs. — Detach engine cover panel 10Engine cover panel; Removing and installing engine cover panel.
4. Unfasten hose clips (arrows) and detach air hose. [Note: (Item 1) can be disregarded.]
5. Move clear electrical connector (3) for high-voltage system at engine.

6. Unplug electrical connector (2) (for low voltage on air conditioner compressor). [Note: (Items 1, 4) can be ignored.]
7. Unscrew bolts (arrows) for air conditioner compressor.
8. Detach air conditioner compressor (A) and swivel it to the left away from the engine as far as possible without kinking or straining the cable of the high-voltage system (C) or the refrigerant hoses.
9. ⚠ Risk of damaging cable or connector of high-voltage systemTake care not to twist or bend the connector of the high-voltage system (B).Take care not to twist, strain, kink or bend the cable of the high-voltage system (C). — Attach the air conditioner compressor to the vehicle (e.g. with a piece of wire) in such a way that neither the high-voltage system wire nor the refrigerant hoses are kinked or strained. [Note: If the air conditioner compressor cannot be swivelled far enough away from the engine, the compressor must be removed completely .] [Note: After re-installing the electrically driven air conditioner compressor (if removed) and then charging the refrigerant circuit, first start up the compressor by way of the "“Compressor run-in”" function of the basic setting routine. Otherwise, the air conditioner compressor may be damaged if refrigerant oil has accumulated in the compression chamber of the air conditioner compressor on account of inappropriate storage prior to installation and Vehicle diagnostic tester in "“Guided Fault Finding”" mode for air conditioner and battery regulation.An electrically driven air conditioner compressor may only be activated when the refrigerant circuit is charged. Running the air conditioner compressor with the refrigerant circuit empty could lead to compressor damage Vehicle diagnostic tester in "“Guided Fault Finding”" mode for air conditioner and battery regulation.]
10. ⚠ Risk of damage to high-voltage system wire or refrigerant lines and hoses.Do not stretch, kink or bend refrigerant lines and hoses. — Fit bolts (A), (B) or (C).
11. ⚠ Different bolts and different tightening torques (depending on engine and production period)Ensure correct allocation Electronic parts catalogue.Use aluminium bolts only once; they must always be renewed (in this case: item (A)).Tightening torque for aluminium bolts (in this case item (A)): 8 Nm +180°Tightening torque for steel bolts (in this case (B) and (C)): 25 Nm — Tighten bolts (arrows). — 8 Nm (5.9 lb-ft) + 180°
12. Plug in connector for vehicle electrical system. [Note: After attaching air conditioner compressor, check routing of refrigerant lines. They must be inserted in the brackets provided (if fitted, depends on engine).Check that refrigerant lines and corresponding brackets have adequate clearance to other components, ensuring sufficient distance between belt, bracket and pulley.]
13. Attach the high-voltage system wire at the specified positions on the engine.
14. Secure clip (1) at engine (2) and retainer (3) at wiring harness (4) as shown in illustration.
15. Install air hoses with screw-type clips 21Charge air system; Exploded view - charge air system.
16. Re-install remaining components (removed earlier).
17. Re-energise power supply of high-voltage system Electrical system93De-energising high-voltage system. [Note: Re-energising high-voltage system:Connect vehicle diagnostic testerSelect Guided Fault Finding modeUsing the Go to key, select the following menu items in successionFunction/component selectionBodyElectrical systemSelf-diagnosis compatible systems8C - Hybrid battery management -J8408C - Hybrid battery management, functions51 - Re-energise high-voltage system (Rep. gr. 93)]
18. ⚠ High voltage can cause fatal injury. Danger of severe or fatal injuries from electric shock. The high-voltage system may only be re-energised by a suitably qualified person (Audi high-voltage technician). The system may only be re-energised using the vehicle diagnostic tester via "“Guided Fault Finding”". The vehicle is then made ready for operation again by the qualified person (Audi high-voltage technician).The qualified person (Audi high-voltage technician) marks the vehicle by attaching the appropriate warning signs. — Switch on ignition.
19. Interrogate event memory of operating and display unit (Climatronic control unit J255) and control unit for air conditioning compressor J842 and erase any faults displayed Vehicle diagnostic tester ("Guided Fault Finding").

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