Audi Air conditioning 2003 A8 User Manual

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Workshop Manual
Audi A8 2003 ➤
Air conditioning
Edition 09.2010
Service
Service Department. Technical Information

Audi Air conditioning 2003 A8 Specifications

General

Refrigerant	R134a
Type	Automatic
Front A/C	Yes
Rear A/C	Yes
Rear vents	Yes
Air filtration	Yes

Summary

87 – Air conditioning system

1 Safety precautions when working on vehicles fitted with an air conditioner and for handling refrigerant

Safety measures for handling refrigerant and working with the AC system.

1.2 Draining refrigerant circuit

Procedure for safely draining the refrigerant from the AC system.

1.3 Working on refrigerant circuit

Guidelines for performing work on the refrigerant circuit safely.

2 Notes on general repairs

2.2 Notes on air conditioner self-diagnosis

Information on using the self-diagnosis function for the air conditioner system.

2.3 Electrical checking of air conditioner components

Procedures for performing electrical checks on AC system components.

3 Servicing refrigerant circuit

3.1 General view of components

Overview of key components within the refrigerant circuit.

3.5 Detaching compressor from holder/attaching on vehicles with 6-cyl. engine, 8-cyl. MPI engine or 8-cyl. diesel engine

Steps for removing and installing the compressor on specific engine types.

4 Replacing compressor pulley

4.1 Replacing pulley

Instructions for replacing the compressor pulley on the AC system.

4.2 Detaching pulley from compressor/re-attaching

Procedure for detaching and re-attaching the compressor pulley.

5 Components for control and regulation of air conditioner not located in passenger compartment

5.1 Components not located in passenger compartment

Identification and location of external AC components.

5.2 Removing and installing dust and pollen filter

Steps for removing and installing the dust and pollen filter.

5.4 Cleaning air conditioner evaporator

Method for cleaning the AC evaporator to remove odors.

5.5 Removing and installing air quality sensor -G238-

Procedure for removing and installing the air quality sensor.

6 Heated windscreen

6.1 Operation of heated windscreen

Explanation of how the heated windscreen system operates.

7 Electrical checking of components actuated by the air conditioner

7.1 Checking of heated rear window -Z1-

Procedure for checking the heated rear window system.

7.2 Checking of heated seats and seat ventilation

Steps for checking heated seats and seat ventilation functions.

8 Components for control and regulation of air conditioner located in passenger compartment

8.1 Components located in passenger compartment

Identification of AC control components within the passenger cabin.

8.2 Removing and installing left centre vent control motor -V110-

Steps for removing and installing the left center vent control motor.

8.7 Removing and installing front operating and display unit, Climatronic control unit -J255-

Procedure for removing and installing the front AC control unit display.

9 Removing and installing heat exchanger of air conditioning unit

9.1 Preparation for heat exchanger removal

Preparatory steps before removing the heat exchanger.

9.2 Removing and installing right (front passenger side) heat exchanger

Procedure for removing and installing the right side heat exchanger.

10 Block diagram of air distribution system

10.1 Air intake and air routing in air conditioning unit

Diagram showing air intake and routing within the AC unit.

10.2 Air routing and air distribution in passenger compartment

Diagram illustrating air distribution paths within the cabin.

11 Checking cooling output of air conditioner

11.1 Prerequisites for checking cooling output

Conditions required before performing a cooling output check.

11.2 Checking cooling output

Steps to check the cooling performance of the air conditioner.

13 Servicing refrigerant circuit

13.1 Servicing refrigerant circuit

General guidelines for servicing the refrigerant circuit.

13.2 Detaching refrigerant lines at compressor/attaching

Procedure for detaching and attaching refrigerant lines at the compressor.

13.3 Removing and installing compressor (basic information)

Basic steps for removing and installing the AC compressor.

13.5 Detaching compressor from holder/removing and installing (on vehicles with 12-cyl. engine)

Specific steps for compressor removal/installation on 12-cyl. engines.

13.7 Checking/replacing compressor drive unit

Steps for checking and replacing the compressor drive unit.

14 Removing and installing air conditioning unit

14.1 Removing

Step-by-step guide for removing the entire air conditioning unit.

14.2 Installing

Instructions for installing the air conditioning unit.

15 Dismantling and assembling air conditioning unit

15.1 Removing and installing covers in plenum chamber, fresh air blower and evaporator

Procedure for removing and installing covers for AC unit components.

15.2 Dismantling and assembling bottom part of housing and air distribution housing

Steps for dismantling and assembling the lower housing and air distribution parts.

15.3 Dismantling and assembling air distribution housing

Procedures for dismantling and assembling the air distribution housing.