Test Requirements

• Ambient temperature greater than 15 °C.
• Clean radiator and condenser (clean if necessary).
• The ribbed belt, which drives the A/C compressor, is OK and is tensioned correctly. The ribbed belt is actually driving the A/C compressor.
• All air ducts, covers and seals OK and properly installed.
• Air flow through dust and pollen filter not obstructed by dirt.
• Air intake apparatus (in fresh air and recirculating air mode) is not impaired by soiling or components installed as retrofit.
• Vehicle not exposed to sunlight.
• Engine is warm.
• The Climatronic control module was checked and erased and a basic setting was performed using Vehicle Diagnosis, Testing and Information System VAS 5051 under "Guided Fault Finding".
• The Climatronic control module coding has been checked using Vehicle Diagnosis, Testing and Information System VAS 5051 under "Guided Fault Finding".
• The Climatronic control module adaptation has been checked using Vehicle Diagnosis, Testing and Information System VAS 5051 under "Guided Fault Finding".

Adjustments on vehicle 

-- Open all instrument panel vents.

-- Close hood.

-- Set operating mode "Auto" Auto on Climatronic control module.

-- Set temperature preselect for driver and front passenger side to Lo on Climatronic control module.

Functions with engine running: 

• Fresh Air Blower -V2- runs at maximum speed.
• The air conditioner goes in recirculating air mode (approximately 1 minute after starting the engine), the fresh air intake is closed and the recirculating air intake opens (fresh air blower extracts the air from passenger compartment below instrument panel / glove compartment).
• The Coolant Fans -V7- run (activation and speed depends on pressure in refrigerant circuit and on the engine temperature).