Condensation Water Drain Hose, Checking
There are different versions of the condensation water drain hose. On the version -A-, it is engaged in the floor panel -2- by three retaining tabs -1-. On the version -B-, it is engaged in the floor panel -2- by the tab -3 and 4-. Make sure that the condensation water drain is seated correctly and securely in the floor panel.
Procedure
-- Remove the center console. Refer to CENTER CONSOLE, REMOVING AND INSTALLING .
Danger of the airbag control module malfunctioning due to corrosion on the connector.
- Cover or seal the connector for 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 be engaged 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 be engaged completely.
- If the pretension is inadequate, seal the connection point between the body and the bracket with silicone adhesive, for example. Refer to the Parts Information.
-- Check the condensation water drain -3- for a secure fit on the heater and A/C unit connection -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 pretension is inadequate, 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-) so that the condensation water can drain from 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).
If there is a complaint regarding moisture in the vehicle interior, check the following components in addition to the condensation water drain:
- Water drain for the plenum chamber. Refer to PLENUM CHAMBER WATER DRAIN, CHECKING .
- Rain water drain channel for damage and correct installation. Refer to RAIN WATER DRAIN CHANNEL, REMOVING AND INSTALLING .
- Plenum chamber cover for damage and correct installation. Refer to Bulkhead ; (Overview - Plenum Chamber Cover).
- Dust and pollen filter for contamination and correct installation. Refer to DUST AND POLLEN FILTER, REMOVING AND INSTALLING .
- Forced air extraction in the luggage compartment. Refer to VEHICLE INTERIOR 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 vehicle interior, also check the vent temperature of the air from the evaporator, which only occurs when the A/C compressor is switched on under certain ambient conditions. Use the Vehicle Diagnostic Tester in the"Guided Fault Finding" function.
- "Read the measured value" for the Evaporator Vent Temperature Sensor -G263-.
-- Check the air vent temperature at the evaporator under the operating conditions described by the customer or at the following setting on the control heads:
Vehicles with Manual Climate Control System:
-- Adjust the following settings on the A/C system control heads:
This illustration shows the layout of the regulators -1, 2 and 3- and the buttons -4 and 5- on a left-hand drive vehicle. The layout may be different on right-hand drive vehicles.
- A/C compressor on: The indicator lamp in the A/C button (in regulator -2-) illuminates.
- Turn the regulator -2- (Front A/C Display Control Head 3 -E776-) for the temperature setting to the "cold" stop.
- Fresh air mode on: The indicator lamp in the Fresh Air and Recirculating Air Mode Button -E781- -4- does not come on.
- Turn the fresh air blower regulator -1- (Front A/C Display Control Head 2 -E775-) to the lowest possible speed (the fresh air blower can still be heard running).
- Turn the regulator -3- (Front A/C Display Control Head 4 -E777-) for air distribution to "instrument panel vent".
Vehicles with Automatic Climate Control System:
-- Adjust the following settings on the A/C system control heads:
This illustration shows the layout of the regulators -1, 2 and 3- and the buttons -4 and 5- on a left-hand drive vehicle. The layout may be different on right-hand drive vehicles.
The information in the regulators -1, 2 and 3- is only displayed when the ignition is switched on and goes out when the ignition is switched off.
- A/C compressor on: The indicator lamp in the A/C button (in regulator -1-) illuminates.
- "Auto" mode on: The indicator lamp in the Auto button (in the regulator -2-) illuminates.
- Turn the regulator -2- (Front A/C Display Control Head 3 -E776-) for the temperature setting to the "cold" stop.
- Turn the regulator -3- (Front A/C Display Control Head 4 -E777-) for air distribution to "instrument panel vent".
- Fresh air mode on: The indicator lamp for "recirculating air mode" in the Recirculation button (in the regulator -3-) does not come on.
- Turn the fresh air blower regulator -1- (Front A/C Display Control Head 2 -E775-) to the lowest possible speed (setting 1, the fresh air blower can still be heard running).
- Defrost mode off: The indicator lamp in the Defrost Button -E782- -4- does not come on.
Continuation 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 .