Component Location Overview - Components Outside Of Passenger Compartment, Front Component Group "1"

NOTE:

Depending on the engine version to support the engine coolant pump an After-Run Coolant Pump - V51- / Heater Support Pump -V488- may be installed (different designations depending on the engine) (not shown in this illustration). Refer to COOLING SYSTEM/COOLANT (Connection Diagram for Coolant Hoses) and applicable SYSTEM WIRING DIAGRAM(S). The After-Run Coolant Pump -V51- / Heater Support Pump -V488- can be actuated in "stop mode" (engine stopped) to maintain the coolant flow rate through the heater core for the heater on with a cold engine or on vehicles with a Start/Stop System.

Fig 1: Components Outside Of Passenger Compartment, Front Component Group "1" Location

Courtesy of AUDI OF AMERICA, LLC

A/C Compressor Regulator Valve -N280-
- Installed inside the A/C compressor
- To check. Refer to Vehicle Diagnostic Tester in the "Guided Fault Finding" function. Refer to A/C Compressor Regulator Valve -N280-, CHECKING SWITCH-ON SIGNAL and applicable SYSTEM WIRING DIAGRAM(S).
  NOTE:
  Certain malfunctions at the A/C Compressor Regulator Valve -N280- (for example, a stuck valve or a short circuit in the coil) can lead to a complaint regarding the A/C compressor (A/C system is not cooling, the evaporator ices over, etc.). If the A/C Compressor Regulator Valve -N280- (and not the A/C compressor itself) is the cause, the A/C compressor can be serviced by replacing the A/C Compressor Regulator Valve -N280-. Refer to A/C Compressor Regulator Valve -N280-, Removing And Installing And Replacing .
  
  The A/C Compressor Regulator Valve -N280- is not available as a replacement part for all A/C compressors. If the A/C Compressor Regulator Valve -N280- is not available as an individual A/C compressor part (different versions), then the entire A/C compressor must be replaced if there is a complaint. Refer to the Parts Information.
A/C Compressor
- There are different versions. Refer to the Parts Information.
- Overview. Refer to OVERVIEW - A/C COMPRESSOR POWER UNIT .
- There are different versions depending on the refrigerant (R134a or R1234yf). Refer to Parts Information.
High Pressure Side Service Connection
- For measuring, discharging and charging
  CAUTION:
  Danger due to refrigerant coming out under pressure when there is a faulty valve in the refrigerant circuit.
  
  Danger of frost bite to skin and other parts of the body.
  - Only remove when the refrigerant circuit is empty; the connection is without a valve. .
- Overview. Refer to OVERVIEW - CONDENSER, A/C COMPRESSOR, EXPANSION VALVE, REFRIGERANT LINE .
- There are different versions depending on the refrigerant (R134a or R1234yf). Refer to SERVICE CONNECTION DIFFERENCES, DEPENDING ON REFRIGERANT (R134A OR R1234YF) or Parts Information.
High Pressure Sensor -G65-
- To check. Refer to Vehicle Diagnostic Tester in the "Guided Fault Finding" function. Refer to High Pressure Sensor -G65-, CHECKING PRESSURE SIGNAL and applicable SYSTEM WIRING DIAGRAM(S).
- Overview. Refer to OVERVIEW - CONDENSER, A/C COMPRESSOR, EXPANSION VALVE, REFRIGERANT LINE .
Low Pressure Side Service Connection
- For measuring and discharging
  CAUTION:
  Danger due to refrigerant coming out under pressure when there is a faulty valve in the refrigerant circuit.
  
  Danger of frost bite to skin and other parts of the body.
  - Only remove when the refrigerant circuit is empty; the connection is without a valve. .
- Overview. Refer to OVERVIEW - CONDENSER, A/C COMPRESSOR, EXPANSION VALVE, REFRIGERANT LINE .
- There are different versions depending on the refrigerant (R134a or R1234yf). Refer to SERVICE CONNECTION DIFFERENCES, DEPENDING ON REFRIGERANT (R134A OR R1234YF) or Parts Information.
Condensation Water Drain
- Checking. Refer to CONDENSATION WATER DRAIN, CHECKING .
- Removing and installing. Refer to CONDENSATION WATER DRAIN, REMOVING AND INSTALLING .
Expansion Valve
- Overview. Refer to OVERVIEW - CONDENSER, A/C COMPRESSOR, EXPANSION VALVE, REFRIGERANT LINE .
- There are different versions depending on the refrigerant (R134a or R1234yf). Refer to Parts Information.
Condenser
- Overview. Refer to OVERVIEW - CONDENSER, DRYER CARTRIDGE .
Receiver/Dryer
- Integrated in the condenser
- Overview. Refer to OVERVIEW - CONDENSER, DRYER CARTRIDGE .