Audi A4 Owners & Service Manuals

Audi A4: A/C System, General Information

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 Introduction

The purpose of this repair manual is to provide service advisors and technicians with the basic knowledge needed to ensure professional and competent procedures.   Note Only the careful study

 A/C Technology Basic Principles

Physical Principles The four known states of water also apply to air conditioning system refrigerants. 1 - Gaseous (invisible) 2 - Vapor 3 - Liquid 4 - Solid

 Refrigerant R134a

Refrigerant R134a Physical Data Vehicle air conditioning systems make use of the vaporization and condensation process. In this case, one works with a substance which boils easily, designated as ref

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 Tie Rod, Removing and Installing

Special tools and workshop equipment required Torque Wrench 1332 40-200Nm -VAG1332- Engine/Gearbox Jack Adapter - Wheel Hub Support -T10149- Engine and Gearbox Jack -VAS6931-   Caution This procedure contains mandatory replaceable parts. Refer to component overview and parts catalog pri

 Checking Pressures on Vehicles with Expansion Valve and Receiver/Dryer (with Internally Regulated Compressor)

General Information   Note Connect the A/C service station. Refer to → Chapter "A/C Service Station, Connecting". Observe the test requirements. Refer to → Chapter "Pressures, Checking". - With the ignition switched off, check the pressure in the refrigerant circuit (u

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