4 Cylinder

A/C Compressor

For vehicles without a high voltage system

Removing

- Turn off the ignition.

- Drain the refrigerant circuit.

• Depending on the allocation of the service connection an on the refrigerant line, and on the version of the vehicle, it may be necessary to remove the additional reinforcement on the left suspension strut dome so that the service coupling of the service station can be connected (for example, on the Audi Q5).

- Remove the front noise insulation.

- Remove the refrigerant lines from A/C compressor. Refer to => [ A/C Compressor Refrigerant Lines ] A/C Compressor Refrigerant Lines.

• The sequence is different and depends on the engine and the power steering pump. Depending on the version of the power steering pump, the A/C compressor must first be removed from the bracket before the refrigerant lines can be removed.

• The power steering pump is installed only on vehicles with electro-mechanical power steering.

- Removing the A/C compressor from the bracket, refer to => [ A/C Compressor Removing from Bracket ] A/C Compressor Removing From Bracket.

Installing

Installation is carried out in the reverse order while noting the following:

• An uncertain quantity of refrigerant oil remains in a removed A/C compressor. Therefore, observe the notes for replacing the A/C compressor.

Before installing the A/C compressor, refer to => [ A/C System, Operating after Filling Refrigerant Circuit ] A/C System, Operating after Filling Refrigerant Circuit.

- Turn the A/C compressor by hand 10 rotations before installing the ribbed belt on the pulley (to prevent damage to the compressor when it is first switched on).

- Install the A/C compressor on the bracket. Refer to => [ A/C Compressor Removing from Bracket ] A/C Compressor Removing From Bracket.

- Attach the refrigerant lines to the A/C compressor. Refer to => [ A/C Compressor Refrigerant Lines ] A/C Compressor Refrigerant Lines.

• Coat the O-ring seals lightly with refrigerant oil prior to installation. Refer to => [ Refrigerant Circuit O-rings ] Refrigerant Circuit O-Rings.

• Rotating will prevent damage to the A/C compressor when starting the engine for the first from refrigerant oil that may be located in the compression chamber.

- Evacuate and fill the refrigerant circuit.

- Install the remaining removed components.

- Switch on the ignition.

- Check the Climatronic control module (J255) DTC memory and erase any displayed malfunctions if necessary. Refer to the Vehicle diagnostic tester in "Guided Fault Finding".

- Operate the A/C system after filling the refrigerant circuit. Refer to => [ A/C System, Operating after Filling Refrigerant Circuit ] A/C System, Operating after Filling Refrigerant Circuit.

• Note the information regarding operating the A/C system after filling.