Test Requirements

WARNING: This page is about a different car, the 2014 Volkswagen Touareg, 2013 Volkswagen Touareg, 2012 Volkswagen Touareg, and 2011 Volkswagen Touareg. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Check the cooling output. The A/C system is functioning correctly when the air flowing from the instrument panel vents has a temperature of 7 °C (44.6 °F) or lower.

Setting on Climatronic "LO".

Setting on A/C system "AC" on; "max" ; "cold".

Connections with valve and service connections for measuring and checking.

Radiator and condenser are clean (clean if necessary).
Thermal Insulation At Expansion Valve OK and properly installed. Refer to EXPANSION VALVE, REMOVING AND INSTALLING
Ribbed Belt Is OK and Properly Tensioned. Ribbed Belt For A/C Compressor And Generator Are OK And Correctly Tensioned. Refer to RIBBED BELT, REMOVING AND INSTALLING [CATA] , RIBBED BELT, REMOVING AND INSTALLING [CGFA] and RIBBED BELT, REMOVING AND INSTALLING [CGRA] for the vehicle-specific Service Information.
All air ducts, covers and seals OK and properly installed.
Fault Finding On The Electrical Equipment And Vacuum System Found No Malfunction. Refer to the appropriate service information.

The A/C system OBD cannot find malfunctions with the Vehicle Diagnostic Tester in "Guided Fault Finding". The measured value block does not show any shut-off condition from the A/C compressor (only on vehicles with "A/C system" OBD).

Air flow through dust and pollen filter not obstructed by dirt. Refer to DUST AND POLLEN FILTER for the vehicle-specific Service Information.
The heater and A/C unit does not draw in any secondary air at the highest fresh air blower speed. Evaporator and heater not drawing in secondary air at maximum fresh-air blower speed. Refer to the appropriate service information.
The air flaps in the heater and A/C unit reach their end position. Refer to ACTUATORS for the vehicle-specific Service Information.
Fresh-air intake ducts beneath hood and in passenger compartment as well as corresponding water drain valves OK, see vehicle specific Service Information. Refer to AIR GUIDE .
The engine is warm.
Vehicle is not exposed to direct sunlight.
Ambient temperature greater than 15 °C (60 °F).
All instrument panel vents are open.
With engine running and maximum cooling output set on air conditioning system:

Refer to DISPLAY AND CONTROL HEAD .

Maximum Cooling Output, Setting

Setting on Front A/C Display Control Head -E87-.

-- Preselect "Auto" mode (A/C compressor on).

-- Set the temperature preset "LO" for the driver and front passenger sides.

Setting On Heater Controls:

-- A/C button and Rec- or recirculated air button pressed.

-- Temperature dial in the cold position.

-- Fresh-air blower dial in 4 position.

The Radiator Fan -V7- runs (the fans run) (at least in level 1).

NOTE:

For some versions, the fan is switched on only once the pressure in refrigerant circuit has exceeded a specified value.

The Fresh Air Blower -V2- runs at maximum speed
Recirculation/fresh air door set to "recirculating air mode", back pressure door is closed and air recirculation door opened (within one minute after starting vehicle).
Is the coolant shut-off valve closed?
Are the valves on the pump/valve unit closed and the coolant circulation pump is not pumping?