Front Condensation Water Drain Hose, Checking
Front Condensation Water Drain Hose, Checking
• This vehicle is equipped with 2 condensation water drains - A - and - B - (left and right on the A/C unit or center tunnel).
• There is no valve and no door present on the outlet opening - C - of the condensation water drain hose - B - ; the condensation water flows over the rubber seals.
• There are different versions of the condensation water hoses - B -. On version 1 (see illustration above), the condensation water drain - B - is inserted directly in the opening - D -.
• On version 2 the condensation water drain - B - is inserted into the bracket - A -. The bracket - A - is held in the opening - D - in the floor panel - C - by tabs. After installing the bracket - A -, the condensation water drain - B - must be pushed with into the floor panel - C - 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 Electronic Parts Catalog.
For Complaints Of Moisture In Passenger Compartment, Check The Following As Well As Condensation Water Drain:
- Plenum chamber water drain, refer to => [ Plenum Chamber Water Drain ] Service and Repair.
- Check the cowl land the fresh air intake housing for proper installation and damage, refer to => [ Fresh Air Intake ] Service and Repair.
- Dust and pollen filter for soiling and correct installation, refer to => [ Dust and Pollen Filter ] Service and Repair.
- The forced air extraction via the luggage compartment=> [ Passenger Compartment Forced Air Extraction, Checking ] Testing and Inspection.
- Back pressure door/fresh air door activation and function, refer to => [ Air Flow Door Motor (V71) ] Air Flow Door Motor (V71) and air recirculation door => [ Recirculation Door Motor (V113) ] Recirculation Door Motor (V113) for example, via the output diagnostic test mode function of the Guided Fault Finding using the 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 A/C unit evaporator as follows, refer to => [ Ice Formation on Evaporator ] Ice Formation on Evaporator:
- In the Guided Fault Finding, select the measured value of the evaporator vent temperature sensor (G263) using the Vehicle Diagnostic Tester in the "Guided Fault Finding" function.
- Check output temperature of air at evaporator under conditions reported by customer or at the following setting on the Climatronic Control Module (J255) Auto operating mode, A/C compressor switched on (control light in AC button lights up), Cold temperature setting, middle fresh air blower speed at a voltage of approximately 7 volts on Fresh Air Blower (V2) , fresh air mode (indicator light Recirculation button does not light up) and open instrument panel vents.
- The sensor measured value is too low (at an ambient temperature above 0°C (32 °F), colder than 0°C (32 °F) for an extended period) or too high (although the A/C system is working properly, greater than 10°C (50 °F), for example). Correct the reason for the deviation while observing the information regarding the cooling output test, refer to => [ A/C Unit, Checking Cooling Output ] A/C Unit, Checking Cooling Output.
Removing, Checking The Condensation Water Drain Hoses
- Switch off ignition.
- Remove the glove compartment (for the right condensation water drain).
- Remove storage compartment on driver's side (for the left condensation water drain).
- 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 A/C 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 -.
Installing
Installation is carried out in the reverse order, when doing this 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 Electronic Parts Catalog.
- In version 2 insert bracket - A - into condensation water drain - B -and press bracket - A - with pre-tension into floor panel - C -.
• On version 2 the condensation water drain - B - is inserted into the bracket - A -. The bracket - A - is held in the opening - D - in the floor panel - C - by tabs. After installing the bracket - A -, the condensation water drain - B - must be pushed with into the floor panel - C - 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 Electronic 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 A/C condenser water drain - A - , secure it with a clamp, for example, so that it cannot slide off.