Condensation Drain Hose, Checking
There are different versions of the condensation water drain hose. On the version -A- it is engaged with three retaining tabs -1- in the floor panel -2-. On the version -B- it is engages with the tab -3- in the floor panel -2- and with a retaining tab -4-. Pay attention that the condensation water drain catches are seated securely on the floor panel.
Procedure
-- Remove the center console. Refer to CENTER CONSOLE, REMOVING AND INSTALLING .
Danger of the airbag control module malfunctioning caused by corrosion on the connector.
- Cover or seal the connector on the airbag control module to protect it from moisture.
-- Cover the airbag control module -3-.
-- Carefully fold back the carpet near the condensation water drain hose far enough so that the condensation water drain hose is visible.
-- The retaining tabs -arrows- on the condensation water drain hose must engage completely and with pretension in the floor panel opening in the body -1- (this illustration shows version "A").
- The sealing lip must not sit loosely on the body opening.
- The retaining tabs -1- (on the version -A-) or -4- (on the version -B-) must engage completely.
- If the pre-tensioning is not adequate, seal the area between the body and the bracket, for example with silicone adhesive. Refer to the Parts Information.
-- Check the condensation water drain -3- for secure fit on the connection for the heater and A/C unit -1-.
- The condensation water drain -3- must not sit loosely on the connection for the heater and A/C unit -1- (condensation water can escape with a loose fit).
- If the pre-tensioning is not adequate, secure the condensation water drain -3- on the connection for the heater and A/C unit -1- with a cable tie or a hose clamp.
-- If the bracket with the condensation water drain hose sits correctly in the body opening and on the connection for the heater and A/C unit, the condensation water drain hose must be checked for dirt.
-- Remove the condensation water drain hose. Refer to CONDENSATION WATER DRAIN HOSE, REMOVING AND INSTALLING .
-- Check the distance between the condensation water drain opening -1- and the heat shield -3-.
- There must be a sufficient distance (dimension -x-) present, so that the condensation water can drain out of the condensation water drain hose -2-.
-- Check the A/C condenser water drain for dirt and if necessary, clean using a piece of wire.
- The cross section of the condensation water drain hose must not be constricted (pressed together).
For complaints of moisture in the passenger compartment, check the following components in addition to the condensation water drain:
- Water drain for the plenum chamber. Refer to PLENUM CHAMBER WATER DRAIN, CHECKING .
- Check the rain water drain channel for damage and correct installation. Refer to WATER CHANNEL, REMOVING AND INSTALLING .
- Plenum chamber cover for damage and correct installation. Refer to Bulkhead ; (Plenum Chamber Cover Overview).
- Dust and pollen filter for soiling and correct installation. Refer to DUST AND POLLEN FILTER, REMOVING AND INSTALLING .
- Forced air extraction in the luggage compartment. Refer to PASSENGER COMPARTMENT FORCED AIR EXTRACTION, CHECKING .
- Activation and function of the air recirculation door (for example, in the "output diagnostic test mode") using the Vehicle Diagnostic Tester in the "Guided Fault Finding" function.
If there are complaints of moisture in the passenger compartment, check the vent temperature of the air from the evaporator, which only emerges when the A/C compressor is switched on under certain climatic conditions. Use the Vehicle Diagnostic Tester in the "Guided Fault Finding" function.
- "Read measured value" for Evaporator Vent Temperature Sensor -G263-.
-- Check the vent temperature at the evaporator under conditions of use described by the customer or at the following setting on the control head:
Vehicles with Manually Controlled A/C System
-- Adjust the following settings on the A/C Control Module -J301- control head:
- A/C compressor on: the indicator lamp in the AC (or A/C ) button -5- illuminates.
- Turn the temperature regulator -1- to the "cold" stop.
- Fresh air mode: The indicator lamp in the Recirculated-air button -2- does not illuminate.
- Turn the regulator -3- for the fresh air blower to level "1".
Vehicles with Automatic Climate Control System
-- Adjust the following settings on the Climatronic Control Module -J255- control head:
- "Auto" mode: the indicator lamp in the AUTO button -11- illuminates.
- Set the temperature preset "cold" via the regulators -1 and 7- : "LO" for the driver and front passenger side in the display -3- on the Climatronic Control Module -J255-.
- Turn the regulator -9- for the fresh air blower to an intermediate speed, with a voltage of approximately 7 V on the Fresh Air Blower -V2-.
- A/C compressor on: The indicator lamp in the A/C button -8- illuminates.
- Fresh air mode: The indicator lamp in the Recirculated-air button -10- does not illuminate.
For all Vehicles
-- Open the instrument panel vents.
-- If the Evaporator Vent Temperature Sensor -G263- measured value is too low (colder than 0 °C (32 °F) for a long period of time when the ambient temperature is above 0 °C (32 °F)) or too high (even though the A/C is working correctly, for example: higher than 10 °C (50 °F)), follow the procedure for checking the cooling output. Refer to COOLING OUTPUT, CHECKING .