S4 V8-4.2L (BHF) (2004)
Expansion Valve: Testing and Inspection
Expansion Valve And Receiver (with Internally Regulated Compressor)
Pressures, Checking For Vehicles With Expansion Valve And Receiver (with Internally Regulated Compressor)
NOTE:
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Connecting service station. See: Testing and Inspection/Component Tests and General Diagnostics/Pressures, Checking on Vehicles
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Observe test conditions. See: Testing and Inspection/Component Tests and General Diagnostics/Pressures, Checking on Vehicles/Refrigerant
Circuit, Checking Pressures (Using Service Station)
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Set engine speed to 2000 rpm.
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Observe pressure gauge of service station.
NOTE:
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Switching pressures and design of refrigerant circuit switches are vehicle-specific.
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Pressures must be measured at service connections; component locations of these connections are vehicle-specific Heating, air conditioning or Air
conditioning.
Specifications
High-pressure side:
Increasing from initial pressure (on connecting pressure gauges) to max. 20 bar
Low-pressure side:
Decreasing from initial pressure (on connecting pressure gauges) to value in graph
A. High pressure in bar
B. Low pressure in bar
C. Permissible tolerance range