A2: Heating, ventilation, air conditioning system
Steering & suspension
Body & interior
Engine
Transmission
General
Heating & A/C
Choose Sections to see everything in a chapter, or a chapter title to start at its first page.
- 06Heating, ventilation, air conditioning systemHeating, ventilation, air conditioning system: Sections
Additional heater47 pages
Self diagnosis, V.A.G Inspection Service23 pages
Additional heater self-diagnosis6 pages
- Technical data of self-diagnosis
- Function
- Fault recognition
- Technical data of self-diagnosis
- Self-diagnosis test prerequisites
- Safety precautions
Performing self-diagnosis2 pages
- Interrogating fault memory
- Additional heater fault table
- Additional heater final control diagnosis
Additional heater basic setting2 pages
- Erasing fault memory, ending output
- Encoding additional heater
- Reading measured value block
- Electrical check of additional heater
Additional heater functional sequence3 pages
Aux. heater/heater booster24 pages
- Safety measures during work on vehicles with additional heater
- Notes on general repairs to vehicles with additional heaters
- Cleanliness rules for work on additional heater and fuel system
Component arrangement for additional heater in vehicle2 pages
Diversion of fuel for additional heater4 pages
Checking and adjusting CO2-content in additional heater exhaust gas4 pages
Incorporation of additional heater into coolant circuit3 pages
- Removing and installing additional heater
Dismantling and assembling additional heater3 pages
- Additional heater block diagram
Air conditioner with refrigerant R134a › Air conditioner202 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 tools8 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
Heating, air conditioning system245 pages
Self diagnosis, V.A.G Inspection Service91 pages
Air conditioner self-diagnosis7 pages
Performing self-diagnosis3 pages
Connecting vehicle diagnostic, testing and information system VAS 5051 and selecting functions2 pages
Final control diagnosis4 pages
- Basic setting
Encoding the operating and display unit for air conditioner/Climatronic E872 pages
Reading the measured value block24 pages
List of available Display group numbers3 pages
Display groups 006 to 01613 pages
Checking the convenience data bus system8 pages
- Function of data bus systems
Checking convenience data bus6 pages
- Locating the possible fault cause
- Fault table for convenience data bus faults
- Locating faults in convenience data bus
- The fault(s) in the convenience data bus is/are only indicated by the operating and display unit for air conditioner/Climatroni
- The fault(s) in the convenience data bus is/are also displayed in another control unit:
Electrical check24 pages
Wiring and component check using test box V.A.G 1598 A6 pages
- Special tools, testers and auxiliary equipment required
- Connecting the test box V.A.G 1598 A to the operating and display unit for air conditioner/Climatronic E87
- Connector configuration of the test box V.A.G 1598 A and adapter cable V.A.G 1598/11
- Checking
- Overview of the electrical tests on the operating and display unit for air conditioner/Climatronic E87
Test steps 5 to 910 pages
- Test step 5:
- Checking the pressure signal from the high-pressure sender G65
- Pin assignment on the high-pressure sender G65
- The pressure signal from the high-pressure sender G65
- Test step 6:
- Checking the cut-in signal for the air conditioner compressor regulating valve N280
- Test step 7:
- Test step 8:
- Test step 9:
Electrical check of heated rear window3 pages
Electrical check for actuation of the heated rear window Z12 pages
Checking electric additional heater10 pages
Checking actuation of electric additional heater by engine control unit3 pages
Checking electric additional heater with a capacity of 900 watts3 pages
Checking the electric additional heater with a capacity of 1500 watts3 pages
Heating53 pages
Dash panel vents and air ducts8 pages
- Air distribution in vehicle interior
- Air duct in heater/ in air conditioner
- Removing and installing intermediate piece for windscreen defroster vent
- Checking the vent frame
Checking, removing and installing fresh air intake duct (in the engine compartment)3 pages
Heater components32 pages
- Checking, removing and installing components
- Contact corrosion!
- Removing and installing dust and pollen filter
Removing and installing flexible shafts3 pages
- Removing and installing the fresh-air blower series resistor with overheating cut-out N24
- Removing and installing the fresh-air blower V2
Removing and installing the fresh-air/recirculated-air flap positioning motor V1543 pages
- Preparing adapter cables for positioning motor actuation
Checking the function of the positioning motor for the fresh-air/recirculated-air flap V154 and the fresh-air/recirculated-air4 pages
- Removing and installing the step-up gear/temperature flap
- Removing and installing the step-up gear/air distribution
Removing and installing the heating element for additional heater Z353 pages
Removing and installing heater4 pages
- Note for vehicles with 1.6 L FSI engine (if heater output is poor)
Removing and installing the heating system heat exchanger8 pages
Removing and installing the heat exchanger with the heater and air conditioner fitted4 pages
Removing and installing the heat exchanger with the heating system and air conditioner removed3 pages
- Dismantling and assembling heating system
Electrical check on the heated rear window4 pages
Electrical check on the heated rear window3 pages
Air conditioner101 pages
Safety precautions when working on vehicles with air conditioners and when handling refrigerant6 pages
Safety precautions when working on vehicles with air conditioners and when handling refrigerant5 pages
Servicing the refrigerant circuit6 pages
- Overview of components
- Removing and installing air conditioner high-pressure sender G65
- O-ring seals for refrigerant circuit
Detaching and attaching compressor from/onto bracket2 pages
Replacing compressor pulley5 pages
Detaching and re-attaching pulley from/onto compressor3 pages
- Checking and adjusting gap between pulley and drive plate
Components for control and regulation of air conditioner43 pages
- Components in the engine compartment and in the rear of the vehicle
- Checking condensation drainage valve
- Components in the passenger compartment
- Removing and installing the heating system heat exchanger
- Removing and installing heating element for additional heater Z35
Removing and installing operating and display unit for air conditioner/Climatronic E873 pages
- Removing and installing the fresh-air blower V2
- Removing and installing the evaporator outlet temperature sender G263
- Preparing adapter cables for positioning motor actuation
Removing and installing the defrost flap positioning motor V107 and the temperature flap positioning motor V683 pages
Removing and installing the recirculated air flap positioning motor V1133 pages
Removing and installing the fresh-air intake duct temperature sensor G893 pages
- Removing and installing the temperature sensor blower V42 dash panel
Checking air conditioner refrigeration capacity7 pages
Checking air conditioner refrigeration capacity5 pages
- Note for vehicles with a 1.6 L FSI engine (if heater output is poor)
Repairing refrigerant circuit25 pages
Removing and installing air conditioner5 pages
Removing and installing air conditioner4 pages
Dismantling and assembling air conditioner2 pages
- Detaching and attaching components from/to the air conditioner
- Dismantling and assembling air conditioner