Plenum Chamber Water Drain, Cleaning
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 .
If it is necessary for the following procedure to perform work near high voltage components, "perform a visual inspection of the high voltage components and cables for damages" and "always follow the warnings when working on the high voltage system". Refer to PERFORMING A VISUAL INSPECTION OF DAMAGE TO HIGH VOLTAGE COMPONENTS AND CABLES ) and .
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.
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.
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.
-- Turn Off The Ignition.
-- Remove the rubber seal -A- and plenum chamber cover -B- (different versions). Refer to PLENUM CHAMBER COVER, REMOVING AND INSTALLING / OVERVIEW - PLENUM CHAMBER BULKHEAD .
- Visually inspect the high voltage components -D- (here the Electric Drive Power and Control Electronics -JX1-) and the high voltage cables -E- after removing the plenum chamber cover -B-. Refer to PERFORMING A VISUAL INSPECTION OF DAMAGE TO HIGH VOLTAGE COMPONENTS AND CABLES and WARNINGS WHEN WORKING ON VEHICLES WITH HIGH VOLTAGE SYSTEM .
- Be careful not to damage any high voltage components -D- or the high voltage cables -E-. Refer to WARNINGS WHEN WORKING ON VEHICLES WITH HIGH VOLTAGE SYSTEM .
- Visually inspect the high voltage components -D- and high voltage cables -E- after completing the work procedures and before installing the plenum chamber cover -B-. Refer to WARNINGS WHEN WORKING ON VEHICLES WITH HIGH VOLTAGE SYSTEM .
To clean the water drains, it may be necessary to remove the cowl panel trim -C-. Refer to PLENUM CHAMBER COVER, REMOVING AND INSTALLING / OVERVIEW - PLENUM CHAMBER BULKHEAD .
For Vehicles without a High Voltage System
-- Turn off the ignition.
-- Remove the plenum chamber cover and/or the cowl panel trim (different versions). Refer to PLENUM CHAMBER COVER, REMOVING AND INSTALLING / OVERVIEW - PLENUM CHAMBER BULKHEAD .
All Vehicles
The following illustrations show the location of the components on an Audi A5 Coupe; an Audi A5 Sportback, Audi A4, Audi Q5, etc. the location of the components varies slightly. The description of the components is not different; removing, installing and checking is performed in the same way as on the Audi A5 Coupe.
The water drain grommets -A- are snapped into the plenum chamber openings from above.
In addition to the two water drain grommets -A- there is an opening on the right side of the body -C- in which water can drain out behind the wheel housing in case both water drain grommets -A- should become obstructed. Likewise, make sure these openings are not obstructed by dirt.
-- Clean The Left And Right Water Drains -A-.
-- Clean The Plenum Channel From Debris (Leaves, Pine Tree Needles) And Other Objects.
Use A Commercially Available Flexible Gripping Tool To Clean, For Example Coarse Dirt From Difficult To Reach Water Drains. Then Wash Out The Any Remaining Contaminates.