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 HIGH VOLTAGE SYSTEM GENERAL WARNINGS .

WARNING:

Risk of unintended engine start

The ignition must be turned off and the ignition key must remain outside of the vehicle when working on vehicles with a high voltage system.

WARNING:

Handling high voltage cables:

Do not stand on or place tools on high voltage cables and their components as it may damage the cable insulation.
Never bend or kink high voltage cables forcefully as it may damage the cable insulation.
The round high voltage connectors are color coded with an external color ring and are mechanically coded using the guide- or code tabs. Always make certain that the coding matches when connecting the round connector in order to avoid any mechanical damage the high voltage connector.

CAUTION:

There is a risk of electrocution from damaged high voltage components.

Observe the following when working around high voltage components and high voltage wires:

Never work around high voltage components and cables with cutting, deformed, or sharp edged tools, or heat sources such as welding or soldering tools, heated air, and thermal glue.
Inspect the high voltage components visually before beginning.
Perform a visual inspection of the Electric Drive Power and Control Electronics -JX1-, the Electro-Drive Drive Motor -V141-, the Electrical A/C Compressor -V470- and the high voltage lines when working in the engine compartment.
Perform a visual inspection of the high voltage lines and covers when working on the underbody.
Perform a visual inspection of the high voltage lines and the Electrobox with the High Voltage System Maintenance Connector -TW- when working in the luggage compartment.
Perform a visual inspection on all of the potential equalization cables.

Observe the following items when performing the visual inspection:

The components do not display any signs of external damage.
The high voltage cable insulation and the potential equalization cables are not damaged.
The high voltage cables do not display any abnormal deformations.
Every high voltage component is marked with a red warning label.

NOTE:

Components on the outside of the vehicle interior for vehicles with and without a high voltage system. Refer to OVERVIEW - COMPONENTS OUTSIDE OF PASSENGER COMPARTMENT

Fig 1: Identifying Components In Engine Compartment

Courtesy of AUDI OF AMERICA, LLC

Coolant Fan -V7- and Coolant Fan 2 -V177-
- For additional information. Refer to OVERVIEW - COMPONENTS OUTSIDE OF PASSENGER COMPARTMENT .
Outside Air Temperature Sensor -G17-
- For additional information. Refer to OVERVIEW - COMPONENTS OUTSIDE OF PASSENGER COMPARTMENT .
Information Label
- With specifications for type of refrigerant and designated fill capacity. Refer to REFRIGERANT R134A CAPACITIES, REFRIGERANT OIL AND APPROVED REFRIGERANT OILS (Refrigerant R134a Servicing, Refrigerant R134a Refrigerant Oil and Approved Refrigerant Oil Capacities).
Fresh Air Intake with Intake Grille
- For additional information. Refer to OVERVIEW - COMPONENTS OUTSIDE OF PASSENGER COMPARTMENT .
Air Quality Sensor -G238- /Humidity Sensor In Fresh Air Intake Duct -G657-
- For additional information. Refer to OVERVIEW - COMPONENTS OUTSIDE OF PASSENGER COMPARTMENT .
Condensation Water Drain
- For additional information. Refer to OVERVIEW - COMPONENTS OUTSIDE OF PASSENGER COMPARTMENT .
Plenum Chamber Water Drain
- For additional information. Refer to OVERVIEW - COMPONENTS OUTSIDE OF PASSENGER COMPARTMENT .
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 HIGH VOLTAGE SYSTEM GENERAL WARNINGS .
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 CONNECTION DIAGRAM - COOLANT HOSES for CALB, CONNECTION DIAGRAM - COOLANT HOSES for CPNB, CONNECTION DIAGRAM - COOLANT HOSES for CTUC and CTUD, COOLANT HOSE, CONNECTION DIAGRAM, NON-HYBRID VEHICLES WITH ALL ENGINE CODES EXCEPT CDZA for CAEB, CPMB, CPMA, or CONNECTION DIAGRAM, COOLANT HOSE, HYBRID VEHICLES for CHJA, .
Plenum Chamber Water Drain
- For additional information. Refer to OVERVIEW - COMPONENTS OUTSIDE OF PASSENGER COMPARTMENT .
Coolant Recirculation Pump -V50-
- For additional information. Refer to COMPONENT GROUP "3" .
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.
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 .
Electrically-Driven A/C Compressor
- With A/C Compressor Control Module -J842- and Electrical A/C Compressor -V470-
- Removing A/C Compressor from bracket and reinstalling in vehicles with 4 cylinder. Engine. Refer to A/C COMPRESSOR, REMOVING AND INSTALLING ON BRACKET, ELECTRICALLY-DRIVEN A/C COMPRESSOR . ¹⁾
  NOTE:
  Depending on time period of production and on engine, compressor construction type may vary .
  
  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 REFRIGERANT R134A CAPACITIES, REFRIGERANT OIL AND APPROVED REFRIGERANT OILS (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 REFRIGERANT R134A CAPACITIES, REFRIGERANT OIL AND APPROVED REFRIGERANT OILS (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.).