Audi Q7 Owners & Service Manuals

Audi Q7: Condensation Water Drain, Removing and Installing

Removing

- Turn off the ignition.

- Remove the glove compartment (for the right condensation water drain). Refer to → Body Interior; Rep. Gr.68; Storage Compartments and Covers; Glove Compartment, Removing and Installing.

- Remove the driver side instrument panel cover (for the left condensation water drain). Refer to → Body Interior; Rep. Gr.68; Storage Compartments and Covers; Driver Side Instrument Panel Cover, Removing and Installing.

- Carefully fold back the floor covering near the condensation water drain hose (left or right front at center tunnel) so that the condensation water drain is visible.

- Check the condensation water drain hoses -B- that they are properly routed and for dirt. Correct, for example, if the hose is constricted.

- Cover the area under both openings -D- (for condensation water drain -C-) with absorbent paper (so that any water present does not get under the carpet).

- Remove both condensation water drain hoses -B- .

- Check both heater and A/C unit condensation water drains -A- for soiling (for example, using a piece of wire).

- Check the gap between the insulation mat installed in the center tunnel -E- and the end of the condensation water hose -C- above the openings -F- in the floor panel -D-; the gap must be large enough so that the condensation water can flow out of the hose -B- .

A87-11825

Installing

Install in reverse order of removal. Note the following:

- Install both condensation water drain hoses -B- so that they are not twisted or crushed (different styles for the left and right side). Refer to the Parts Catalog.

- Insert the condensation water drain -B- and push with pretension in the floor panel -F-.

  Note

The condensation water drain -B- must be pushed with pretension into the floor panel -F- after installing to prevent any condensation water coming out of the drain -B- into the passenger compartment. Seal the area between both parts with silicone adhesive D176 001 A3. Refer to the Parts Catalog.

- Make sure the carpet does not push up against the condensation water drain hose -B- when installing.

- If a condensation water drain hose -B- fits too loose on the heater and A/C unit condensation water drain -A-, secure it with a clamp, for example, so that it cannot slide off.

A87-11825

Condensation Water Drain, Checking

  Note

  • This vehicle is equipped with two condensation water drains -B- (left and right on the heater and A/C unit or center tunnel).
  • The end -C- of the condensation water drain hose -B- does not have a valve or a door. The condensation water flows out over the rubber seals.
  • There are different versions of the condensation water drain hoses -B-. On this version the condensation water drain -B- is inserted in the opening -D-.

For complaints of moisture in passenger compartment, check the following as well as condensation water drain:

- Plenum chamber water drains. Refer to → Chapter "Plenum Chamber Water Drain, Removing and Installing".

- Check the plenum chamber cover and the fresh air intake housing for proper installation and damage. Refer to → Chapter "Fresh Air Intake, Removing and Installing".

- The dust and pollen filter for soiling and correct installation. Refer to → Chapter "Dust and Pollen Filter, Removing and Installing".

- The forced air extraction via the luggage compartment. Refer to → Chapter "Vehicle Interior Forced Air Extraction, Removing and Installing".

- The back pressure door/fresh air door activation and function (refer to → Chapter "Fresh Air Door Motor -V438- Function, Removing and Installing") and air recirculation door (refer to → Chapter "Recirculation Door Motor -V113-, Removing and Installing") for example, via the "output diagnostic test mode" function of the Guided Fault Finding. Refer to Vehicle Diagnostic Tester in the "Guided Fault Finding" function.

  • If there are complaints regarding humidity in the passenger compartment which only appears when the A/C compressor is switched on and under certain climatic conditions, check the temperature of the air coming out of the vents from the front heater and A/C unit evaporator as follows. Refer to → Chapter "Localizing Malfunction for Ice Build-Up on Evaporator".

- In the Guided Fault Finding, select the measured value of the Evaporator Vent Temperature Sensor -G263-. Refer to Vehicle Diagnostic Tester in the "Guided Fault Finding" function.

- Check the output temperature of air at evaporator under conditions reported by the customer or at the following setting on the Front A/C Display Control Head -E87-, "Auto" operating mode, A/C compressor switched on (indicator lamp in the A/C or A/C MAX button lights up), temperature setting "Cold", middle fresh air blower speed at a voltage of approximately 7 V on the Fresh Air Blower -V2-, fresh air mode (indicator lamp "Recirculation" button does not light up) and open instrument panel vents, the air vent temperature at the evaporator.

- The sensor measured value is too low (at an ambient temperature above 0 ºC (32 ºF), colder than 0 ºC (32 ºF) for an extended period) or too high (although the A/C system is working properly, greater than 10 ºC (50 ºF), for example). Correct the reason for the deviation while observing the information regarding the cooling output test. Refer to → Chapter "Cooling Output, Checking".

A87-11825

    READ NEXT:

     Rear Heater and A/C Unit

     Overview - Attachments for Heater and A/C Unit and Air Intake Housing

    General information for "Mid"/"Mix" and "High" A/C System   Caution Interchange of the wire connections to the temperature sensors or the connectors at the adjustment motors results in proble

     Evaporator, Removing and Installing

      Note The removed evaporator contains refrigerant oil that must be returned to the refrigerant circuit (with the new evaporator). Refer to → Refrigerant R134a Servicing; Rep. Gr.

    SEE MORE:

     General information

    Applies to: vehicles with Audi connect Depending on the country and the vehicle equipment, the following functions may be available: Audi connect Infotainment Audi connect vehicle control WARNING To reduce the risk of an accident, only use Audi connect services and the Wi-Fi hotspot only if

     ATF

    ATF Level, Checking ATF Level, Checking, 0D3 "Sport Differential"   Caution This procedure contains mandatory replaceable parts. Refer to component overview prior to starting procedure. Mandatory Replacement Parts Plug - ATF check Test Requirement ATF temperature: 10 ºC to 60 ºC (50 t

    © 2019-2024 Copyright www.a-q7.com