VW Touran manuals

Volkswagen Touran Service Manual: Test Requirements

  Note
Check cooling performance. The A/C system is functioning correctly when the air flowing from the instrument panel vents has a temperature of 70C 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 → Rep. Gr.87 for the vehicle-specific repair manual.
Ribbed belt is OK and properly tensioned. Ribbed belt for A/C compressor and generator are OK and correctly tensioned. Refer to → Rep. Gr.87 for the vehicle-specific repair manual.
All air ducts, covers and seals OK and properly installed.
Fault finding on the electrical equipment and vacuum system found no malfunction. Refer to → Rep. Gr.87 for the vehicle-specific repair manual.
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 → Rep. Gr.87 for the vehicle-specific repair manual.
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 → Rep. Gr.87 for the vehicle-specific repair manual.
The air flaps in the heater and A/C unit reach their end position. Refer to → Rep. Gr.87 for the vehicle-specific repair manual.
Fresh-air intake ducts beneath hood and in passenger compartment as well as corresponding water drain valves OK, see vehicle specific Repair Manual. Refer to → Rep. Gr.87.
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 → Rep. Gr.87.
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 Coolant 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.
Recirculated/fresh-air door set to "air recirculation mode" (within 1 min. after starting vehicle, air-flow door is closed and recirculated air door opened).*
Is the coolant shut-off valve closed?*
Are the valves on the pump valve unit closed and the coolant circulation pump is not pumping? *
Refrigerant Circuit Pressures (with A/C Service Station), Checking
...

Pressures, Checking
  Note Check cooling performance. The A/C system is functioning correctly when the air flowing from the instrument panel vents has a temperature of ...

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