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Home >> Audi >> 2012 >> Q5 2.0T >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> A/C Compressor >> Heating, Ventilation & Air Conditioning (1 Of 2) (As Of 06.2014) >> 87 Air Conditioning >> Refrigerant Circuit >> Overview - Refrigerant Line

Overview - Refrigerant Line

On vehicles with a high voltage system (hybrid vehicles)

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.
WARNING:
  • The bolts of the connection point may only be loosened when the refrigerant circuit has been discharged.
Fig 1: Refrigerant Lines Connection Points
GWWA87-11029Courtesy of AUDI OF AMERICA, LLC
  1. Bolt
  2. Low Pressure Refrigerant Line
    • On the rear underbody
  3. O-Ring Seal
    • Replacing
  4. Pass-Through for the Refrigerant Lines in the Luggage Compartment
  5. O-Ring Seal
    • Replacing
  6. High Pressure Refrigerant Line
    • On the rear underbody
  7. Bolt
  8. Bolt
  9. High Pressure Refrigerant Line
    • On the front underbody
  10. O-Ring Seal
    • Replacing
  11. High Pressure Refrigerant Line
    • On the rear underbody
  12. Bolt
  13. Low Pressure Refrigerant Line
    • On the rear underbody
  14. O-Ring Seal
    • Replacing
  15. Low Pressure Refrigerant Line
    • On the front underbody
  16. Bolt
  17. Low Pressure Refrigerant Line
    • On the front underbody
  18. O-Ring Seal
    • Replacing
  19. Low Pressure Refrigerant Line
    • In the engine compartment
  20. Bolt
  21. High Pressure Refrigerant Line
    • On the front underbody
  22. O-Ring Seal
    • Replacing
  23. High Pressure Refrigerant Line
    • In the engine compartment
  24. Sheet Metal Nut
  25. High Pressure Refrigerant Line
    • On the underbody
  26. Low Pressure Refrigerant Line
    • On the underbody
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