Reducing Agent Active Tank, Removing And Installing: Removing

WARNING: This page is about a different car, the 2015 Audi Q7, 2014 Audi Q7, and 2013 Audi Q7. However, it is still accessible from the selected car via links, so may be relevant.

Follow all safety precautions. Refer to SELECTIVE CATALYTIC REDUCTION (SCR) SYSTEM SAFETY PRECAUTIONS .

Follow the guidelines for clean working conditions. Refer to FUEL SUPPLY, INJECTION SYSTEM AND CHARGING SYSTEM CLEAN WORKING CONDITIONS .

-- Switch the ignition off and remove the ignition key.

WARNING:

The weight of the active tank could cause an accident.

The active tank must be empty when removing.

-- Reducing agent active tank, draining. Refer to REDUCING AGENT ACTIVE TANK, DRAINING .

-- Open the fuel filler door.

Fig 1: Identifying Locking Cap -2-

Courtesy of AUDI OF AMERICA, LLC

-- Clean the area around the reducing agent filler tube.

-- Remove the locking cap -2- from the reducing agent filler tube.

NOTE:

Seal the opening on the reducing agent filler tube with a plug to prevent dirt from entering the active tank.

-- Disconnect the connectors -2, 4, 5 and 6- and free up the wiring harness.

Fig 2: Connectors Location

Courtesy of AUDI OF AMERICA, LLC

-- Disconnect the connector -arrow- for vehicles with a Reducing Agent Tank Cap Switch -F502-.

NOTE:

Place a clean cloth under the separating location to catch any reducing agent that may leak out.

Seal off all open lines and connections with clean plugs.

WARNING:

The reducing agent can cause skin irritation.

Avoid contact with skin and eyes! Always wear protective gloves and safety glasses.
If reducing agent should get on your skin, wash it off immediately with soap and water.
If reducing agent gets in your eye, rinse the eye for several minutes with water.
Never inhale or swallow the reducing agent!
Should you swallow any reducing agent, rinse your mouth, drink plenty of water and contact a doctor immediately.

-- Disconnect the metering line -7- by pressing the release clasp.

-- Disconnect the filling line -8- by pressing the release clasp.

-- Remove the bolts -1, 3 and 9-. A second technician must support the active tank.

-- Lower the active tank -1- slightly.

Fig 3: Active Tank -1-, Transfer Line -2-

Courtesy of AUDI OF AMERICA, LLC

-- Carefully guide filler tube out of rubber buffer inside the wheel housing so avoid paint damage.

-- Disconnect the transfer line -2- by pressing the release clasp. Refer to Figure.

Install in reverse order of removal. Note the following: