A1: Heating, ventilation, air conditioning system
Steering & suspension
Body & interior
Engine
Transmission
General
Heating & A/C
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- 06Heating, ventilation, air conditioning systemHeating, ventilation, air conditioning system: Sections
Heating and air conditioning121 pages
Heating18 pages
Notes on general repairs3 pages
Components for control and regulation of heater not located in passenger compartment2 pages
Components for control and regulation of heater located in passenger compartment7 pages
Overview of air distribution3 pages
Heat output of heater3 pages
Air conditioner103 pages
Safety measures for working on vehicles with air conditioning and for handling refrigerant6 pages
Notes on general repairs3 pages
Servicing refrigerant circuit7 pages
- General view of components
- O-rings for refrigerant circuit
- Detaching and attaching air conditioner compressor with refrigerant lines connected
- Checking pressure signal from high-pressure senderG65
- Removing and installing high-pressure senderG65
- Checking activation signal for air conditioner compressor regulating valveN280
Air conditioner compressor pulley9 pages
- Exploded view of "Denso" air conditioner compressor pulley - version "1"
- Removing and installing pulley on "Denso" air conditioner compressor - version "1"
- Exploded view of "Denso" air conditioner compressor pulley - version "2"
- Removing and installing pulley on "Denso" air conditioner compressor - version "2"
- Exploded view of "Denso" air conditioner compressor pulley - version "3"
- Removing and installing pulley on "Denso" air conditioner compressor - version "3"
- Exploded view of "Sanden" ("Delphi") air conditioner compressor pulley
- Removing and installing "Sanden" ("Delphi") air conditioner compressor pulley
Controlling and regulating components of air conditioner (not in passenger compartment)7 pages
- Components not located in passenger compartment
- Removing and installing ambient temperature sensorG17
- Checking and cleaning plenum chamber water drain
- Removing and installing fresh air intake grille
- Checking passenger compartment forced air extraction
- Removing and installing passenger compartment forced air extractor
Controlling and regulating components of air conditioner (in passenger compartment)14 pages
- Block diagram of air conditioning unit
- General information on operating unit, air conditioning system control unitJ301 - manually controlled air conditioner
- General information on operating unit, Climatronic control unitJ255 - automatically controlled air conditioner
- Removing and installing sunlight penetration photosensorG107 - automatically controlled air conditioner
- Removing and installing evaporator output temperature senderG263
- Removing and installing centre vent temperature senderG191 - automatically controlled air conditioner
- Removing and installing footwell vent temperature senderG192 - automatically controlled air conditioner
- Removing and installing dust and pollen filter
- Dust and pollen filter with activated charcoal filter element - automatically controlled air conditioner
- Possible cause of odour formation at the air conditioner
- Cleaning evaporator of air conditioner with ultrasonic A/C cleanerVAS 6189A
- Checking condensation drain hose
- Removing and installing condensation drain hose
Components actuated by the air conditioning system control unit8 pages
- Preparing adapter cables for actuation of control motors
- Operation of fresh air and air recirculation flap control motorV154 and fresh air/air recirculation button - heater, manually c
- Checking fresh air and air recirculation flap control motorV154 - heater, manually controlled air conditioner
- Checking control unit J65 / J301 and fresh air and air recirculation flap control motorV154
- Operation of air recirculation flap control motorV113 and fresh-air/air recirculation button - automatically controlled air con
- Checking air recirculation flap control motorV113 - automatically controlled air conditioner
- Checking Climatronic control unitJ255 and air recirculation flap control motorV113
Components of manually controlled air conditioner12 pages
- Exploded view of air conditioning unit add-on components
- Removing and installing operating unit, air conditioning system control unitJ301 - manually controlled air conditioner
- Removing and installing frame for operating unit, air conditioning system control unitJ301 - manually controlled air conditione
- Removing and installing flexible temperature adjustment shaft - heater, manually controlled air conditioner
- Removing and installing flexible air distribution shaft - heater, manually controlled air conditioner
- Removing and installing temperature flap gear mechanism
- Removing and installing air distribution gear mechanism
- Removing and installing fresh air and air recirculation flap control motorV154
- Removing/installing and checking fresh air blower series resistor with overheating fuseN24 - heater, manually controlled air co
- Removing and installing fresh air blowerV2 - heater, manually controlled air conditioner
- Removing and installing supplementary air heater elementZ35
Components of automatically controlled air conditioner11 pages
- Exploded view of air conditioning unit add-on components
- Removing and installing operating unit, Climatronic control unitJ255
- Removing and installing temperature sensor blowerV42
- Removing and installing temperature flap control motorV68 and defroster flap control motorV107
- Removing and installing centre flap control motorV70
- Removing and installing air recirculation flap control motorV113
- Removing and installing fresh air blower control unitJ126
- Removing and installing fresh air blowerV2
- Removing and installing heat exchanger
- Removing and installing supplementary air heater elementZ35
Block diagram of air distribution system8 pages
- Air inlet and vents of air conditioning unit
- Air routing and air distribution in passenger compartment
- Removing and installing air duct for windscreen defroster vent
- Removing and installing air duct for centre dash panel vent
- Removing and installing air duct for driver side footwell vent
- Removing and installing air duct for passenger side footwell vent
- Removing and installing rear footwell vent air duct
Air conditioner cooling output7 pages
- Checking air conditioner cooling output - vehicles with manually controlled air conditioner
- Fault Finding if readout does not match specification
- Fault Finding if temperature increases downstream of evaporator
- Checking air conditioner cooling output - vehicles with automatically controlled air conditioner
- Measures to be taken if readout does not match specification
- Fault Finding if temperature increases downstream of evaporator
- Fault Finding if ice forms at evaporator
Dismantling and assembling air conditioning unit7 pages
- Capacities
Air conditioner with refrigerant R134a › Air conditioner201 pages
Warning instructions when working on vehicles with high-voltage system3 pages
General information on air conditioning systems42 pages
- General notes
- Introduction
- Safety measures for vehicles with start/stop system
- Other reference material
Principles of air conditioning systems4 pages
- General work safety
- Product properties
- Handling refrigerant
- Handling pressure vessels
- Safety regulations for working with extraction and charging systems
- Safety measures for working on vehicles with air conditioning system and for handling refrigerant R134a
- Before using air conditioner after system has been re-charged
General information on refrigerant circuit47 pages
- Components of refrigerant circuit
Layout of components of refrigerant circuit and their influence on high-pressure and low-pressure sides16 pages
- Mechanically driven air conditioner compressor
- Electrically driven air conditioner compressor for vehicles with a high-voltage system
- Condenser
- Evaporator
- Reservoir
- Restrictor
- Receiver
- Expansion valve
- Expansion valve with refrigerant shut-off valve 2 for hybrid batteryN517
- Refrigerant shut-off valve 1 for hybrid batteryN516
- Refrigerant line with internal heat exchanger
- Quick-release couplings on refrigerant line
- O-rings
- Pipes and hoses of refrigerant circuit
- High-pressure safety valve
Design of refrigerant circuit3 pages
- Refrigerant circuit with electrically driven air conditioner compressor (with and without battery cooling module)
Connections for quick-release coupling in refrigerant circuit3 pages
Switches and senders in refrigerant circuit and related connections11 pages
- High-pressure switch for air conditioning systemF23
- High-pressure switch for magnetic clutchF118
- Low-pressure switch for air conditioning systemF73
- Connections with valve for refrigerant circuit switches
- Air conditioning system pressure switchF129
- High-pressure senderG65 and pressure sender for refrigerant circuitG805
- Refrigerant pressure and temperature senderG395
- Air conditioner compressor regulating valveN280
- Air conditioning system compressor speed senderG111
- Refrigerant temperature senderG454
Electrical components not installed in refrigerant circuit2 pages
Pressures and temperatures in refrigerant circuit3 pages
Tests and measurements performed with pressure gauge2 pages
Air conditioner service and recycling units3 pages
- Repair notes for refrigerant circuit
Laws and regulations4 pages
Refrigerant circuit22 pages
- Important repair notes for air conditioning systems
- Converting refrigerant circuits from refrigerant R12 to refrigerant R134a
Working with the air conditioner service station9 pages
- Important notes for working with the air conditioner service station
- Connecting air conditioner service station for measuring and testing
- Discharging refrigerant circuit with air conditioner service station
- Evacuating refrigerant circuit with air conditioner service station
- Charging refrigerant circuit with air conditioner service station
- Starting up air conditioner after charging
- Pouring refrigerant into reservoir (charging cylinder or storage vessel) of air conditioner service station
- Discharging air conditioner service station
Blowing out refrigerant circuit with compressed air and nitrogen2 pages
Flushing (cleaning) refrigerant circuit with refrigerant R134a4 pages
Tracing leaks in refrigerant circuit4 pages
Problems with refrigerant circuit4 pages
Connecting air conditioner service station6 pages
- Connecting air conditioner service station on vehicles with a connection on the low and high-pressure end of the refrigerant cir
Connecting air conditioner service station on vehicles with no connection on the low-pressure end of the refrigerant circuit4 pages
Checking pressures15 pages
Checking pressures in refrigerant circuit with air conditioner service station (with ignition switched off)4 pages
Checking pressures on vehicles with a restrictor and reservoir (with internally regulated air conditioner compressor)2 pages
Checking pressures on vehicles with an expansion valve and receiver (with internally regulated air conditioner compressor)2 pages
Checking pressures on vehicles with restrictor, reservoir and air conditioner compressor regulating valveN280 (with externally r2 pages
Checking pressures on vehicles with expansion valve, receiver and air conditioner compressor regulating valveN280 (with external2 pages
Checking pressures on vehicles with an electrically driven air conditioner compressor (vehicles with a high-voltage system)2 pages
Renewing components of refrigerant circuit8 pages
Renewing components7 pages
- Leaking or damaged components (except air conditioner compressor, reservoir or receiver)
- Leaking or damaged components (except air conditioner compressor, reservoir or receiver)
- Renewing air conditioner compressor without the need for refrigerant circuit cleaning
- Renewing air conditioner compressor on account of leakage or internal damage
- Renewing receiver or reservoir and restrictor after cleaning refrigerant circuit
- Renewing receiver or reservoir without the need for refrigerant circuit cleaning
- Renewing dryer cartridge/desiccant bag without the need for refrigerant circuit cleaning
Capacities for refrigerant R134a, refrigerant oil and approved refrigerant oils43 pages
Capacities for refrigerant R134a20 pages
- Capacities for Audi A1 (8X_) 2011 ?
- Capacities for Audi A2 (8Z_) 2001 ?
- Capacities for Audi A3 (8L_) 1997 ? and Audi TT (8N_) 1999 ?
- Capacities for Audi A3 (8P_) 2004 ?, Audi Q3 (8U_) 2012 ?
- Capacities for Audi TT (8J_) 2007 ?
- Capacities for Audi 80 (8A_/8C_), Audi Coupé (8B_), Audi Cabriolet (8G_) ? 2002
- Capacities for Audi A4 (8D_) 1995 ?
- Capacities for Audi A4 (8E_) 2001 ?, Audi A4 Cabriolet (8H_) 2003 ?
- Capacities for Audi A4 (8K_) 2008 ?, Audi A5 Coupé and Sportback (8T_) 2008 ?, Audi Q5 (8R_) 2008 ?, Audi A5 Cabriolet (8F_) 200
- Capacities for Audi 100 / Audi A6 (4A_) ? 1998
- Capacities for Audi A6 (4B_) 1998 ? and Audi allroad (4B_) ? 2005
- Capacities for Audi A6 (4F_) 2005 ?
- Capacities for Audi A6 (4G_) 2011 ?, Audi A7 (4G_) 2011 ?, Audi A6 hybrid (4G_) 2012 ?
- Capacities for Audi V8 (4C_) ? 1994
- Capacities for Audi A8 (4D_) 1994 ?
- Capacities for Audi A8 (4E_) 2003 ?
- Capacities for Audi A8 (4H_) 2010 ?, Audi A8 hybrid (4H_) 2012 ?
- Capacities for Audi Q7 (4L_) 2006 ?
- Capacities for Audi R8 (42_) 2008 ?
Approved refrigerant oils and refrigerant oil capacities22 pages
- Approved refrigerant oils
- Refrigerant oil capacities
- Capacities for Audi A1 (8X_) 2011 ?
- Capacities for Audi A2 (8Z_) 2001 ?
- Capacities for Audi A3 (8L_) 1997 ? and Audi TT (8N_) 1999 ?
- Capacities for Audi A3 (8P_) 2004 ?, Audi Q3 (8U_) 2012 ?
- Capacities for Audi TT (8J_) 2007 ?
- Capacities for Audi 80 (8A_/8C_), Audi Coupé (8B_), Audi Cabriolet (8G_) ? 2002
- Capacities for Audi A4 (8D_) 1995 ?
- Capacities for Audi A4 (8E_) 2001 ?, Audi A4 Cabriolet (8H_) 2003 ?
- Capacities for Audi A4 (8K_) 2008 ?, Audi A5 Coupé and Sportback (8T_) 2008 ?, Audi Q5 (8R_) 2008 ?, Audi A5 Cabriolet (8F_) 200
- Capacities for Audi 100 / Audi A6 (4A_) ? 1998
- Capacities for Audi A6 (4B_) 1998 ? and Audi allroad ? 2005
- Capacities for Audi A6 (4F_) 2005 ?
- Capacities for Audi A6 (4G_) 2011 ?, Audi A7 (4G_) 2011 ?, Audi A6 hybrid (4G_) 2012 ?
- Capacities for Audi V8 (4C_) ? 1994
- Capacities for Audi A8 (4D_) 1994 ?
- Capacities for Audi A8 (4E_) 2003 ?
- Capacities for Audi A8 (4H_) 2010 ?, Audi A8 hybrid (4H_) 2012 ?
- Capacities for Audi Q7 (4L_) 2006 ?
- Capacities for Audi R8 (42_) 2008 ?
Test equipment and tools7 pages
List of testers, tools and materials4 pages
- Tools and materials available from regional sales centre or importer
- Commercially available tools and materials
- Improvised tools