Overview - Components Outside Of Passenger Compartment

Observe all of the additional warnings for all work performed on vehicles with the high voltage system. Refer to HIGH VOLTAGE VEHICLES SAFETY PRECAUTIONS and WARNINGS WHEN WORKING ON VEHICLES WITH HIGH VOLTAGE SYSTEM .

Fig 1: Identifying Components In Engine Compartment

Courtesy of AUDI OF AMERICA, LLC

1. Coolant Fan -V7- and Coolant Fan 2 -V177-
   • For additional information. Refer to OVERVIEW - COMPONENTS OUTSIDE OF PASSENGER COMPARTMENT .
2. Outside Air Temperature Sensor -G17-
   • For additional information. Refer to OVERVIEW - COMPONENTS OUTSIDE OF PASSENGER COMPARTMENT .
3. Information Label
   • With Specifications For Type Of Refrigerant And Designated Fill Capacity. Refer To TECHNICAL DATA and REFRIGERANT OIL / REFRIGERANT OIL CHARACTERISTICS and REFRIGERANT OIL CAPACITIES / APPROVED REFRIGERANT OILS AND REFRIGERANT OIL CAPACITIES .
4. Fresh Air Intake with Intake Grille
   • For additional information. Refer to OVERVIEW - COMPONENTS OUTSIDE OF PASSENGER COMPARTMENT .
5. Air Quality Sensor -G238- /Humidity Sensor In Fresh Air Intake Duct -G657-
   • For additional information. Refer to OVERVIEW - COMPONENTS OUTSIDE OF PASSENGER COMPARTMENT .
6. Condensation Water Drain
   • For additional information. Refer to OVERVIEW - COMPONENTS OUTSIDE OF PASSENGER COMPARTMENT .
7. Plenum Chamber Water Drain
   • For additional information. Refer to OVERVIEW - COMPONENTS OUTSIDE OF PASSENGER COMPARTMENT .
8. Electric Drive Power and Control Electronics -JX1-
   • Read and follow all of the supplemental warnings for all work performed on the Electric Drive Power And Control Electronics -JX1- and vehicles with the high voltage system. Refer to HIGH VOLTAGE VEHICLES SAFETY PRECAUTIONS and WARNINGS WHEN WORKING ON VEHICLES WITH HIGH VOLTAGE SYSTEM .
9. Climatronic Coolant Shut-Off Valve -N422- /Coolant Shut-Off Valve -N82-

   On certain vehicles (depending on the engine), vacuum-controlled coolant Shut-Off valves were installed on vehicles without a "parking heater" from start of production. Shut-Off valves that are directly activated were introduced as a later time as a running change. This valve may be referred to as the Climatronic Coolant Shut-Off Valve -N422- or the Coolant Shut-Off Valve -N82- depending on the engine version and when the vehicle was produced. Refer to COOLANT SHUT-OFF VALVE -N82- /CLIMATRONIC COOLANT SHUT-OFF VALVE -N422- LOCATION, ACTIVATION AND FUNCTION .

   • For additional information. Refer to OVERVIEW - COMPONENTS OUTSIDE OF PASSENGER COMPARTMENT .
     NOTE:

     On vehicles with an engine with a regulated coolant circuit (for example, with a regulated coolant pump and a Cylinder Head Coolant Valve -N489-), no Climatronic Coolant Shut-Off Valve -N422- /Coolant Shut-Off Valve -N82- is currently installed. On an engine with a regulated coolant pump, the engine control module activates the coolant pump, and in doing so regulates the coolant circuit. Refer to COOLANT PUMP/THERMOSTAT [CAUA] , COOLANT PUMP/THERMOSTAT [CFSA] , COOLANT PUMP/COOLANT THERMOSTAT [CAED, CAEB, CPMB, CPMA] , COOLANT PUMP/THERMOSTAT [CALA] and COOLANT SYSTEM/COOLANT [CAED, CAEB, CPMB, CPMA]] (2 Of 2) .

10. Plenum Chamber Water Drain
    • For additional information. Refer to OVERVIEW - COMPONENTS OUTSIDE OF PASSENGER COMPARTMENT .
11. Coolant Recirculation Pump -V50-
    • For additional information. Refer to OVERVIEW - COMPONENTS OUTSIDE OF PASSENGER COMPARTMENT .
12. Refrigerant Line Connections to the Evaporator Inside the Battery Cooling Module
    WARNING:

    • The Bolts Of The Connection Point May Only Be Loosened When The Refrigerant Circuit Has Been Discharged.
13. Hybrid Battery Refrigerant Shut-Off Valve 1 -N516-
    • Installed Inside The Engine Compartment Near The Left Suspension Strut Tower
    • Check using the Vehicle Diagnostic Tester in the "Guided Fault Finding" function.
      NOTE:

      The Hybrid Battery Refrigerant Shut-Off Valve 1 -N516- is activated, for example, if it is necessary to cool the battery and no cooling is desired in the passenger compartment (Open Without Activation).

    • Removing and installing. Refer to HYBRID BATTERY REFRIGERANT SHUT-OFF VALVE 1 -N516-, REMOVING AND INSTALLING .
14. Electrically-Driven A/C Compressor
    • With A/C Compressor Control Module -J842- and Electrical A/C Compressor -V470-

      Refer to the appropriate ELECTRIC A/C COMPRESSOR / ELECTRIC A/C COMPRESSOR REMOVING FROM BRACKET service information

    NOTE:

    Depending on time period of production and on engine, compressor construction type may vary. Refer to the Parts Information.

    A/C compressors used as replacement parts have different oil capacities, therefore note the amount of oil in the A/C compressor and the exact part number. Refer to the Parts Information and TECHNICAL DATA and REFRIGERANT OIL / REFRIGERANT OIL CHARACTERISTICS and REFRIGERANT OIL CAPACITIES / APPROVED REFRIGERANT OILS AND REFRIGERANT OIL CAPACITIES (Refrigerant R134a, Servicing; Refrigerant R134a Capacities, Refrigerant Oil and Approved Refrigerant Oil).

    Depending on A/C compressor type, different refrigerant oil capacities may be designated for the refrigerant circuit. The reason for the different oil capacities in the A/C compressor for an otherwise identical refrigerant circuit is the design of the compressor. Observe these oil capacities. Too much oil in the refrigerant circuit increases the pressures and reduces the cooling output of the A/C system. Too little oil can result in lubrication problems in the A/C compressor. Refer to TECHNICAL DATA and REFRIGERANT OIL / REFRIGERANT OIL CHARACTERISTICS and REFRIGERANT OIL CAPACITIES / APPROVED REFRIGERANT OILS AND REFRIGERANT OIL CAPACITIES (Refrigerant R134a, Servicing; Refrigerant R134a Capacities, Refrigerant Oil and Approved Refrigerant Oil).

    When installing refrigerant lines and the corresponding brackets, make sure there is adequate distance to the other components (such as the belt, engine belt pulley, etc.).