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Home >> Volkswagen >> 2021 >> Jetta S, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 26 (Exhaust System & Emission Controls System (Service Information - 2.0L - CVCA, CUUA, CUUB, DELA, DEBA, DEJA & DGMA)) >> 26 Exhaust System, Emission Controls >> Selective Catalytic Reduction System >> Reducing Agent Tank, Draining

Reducing Agent Tank, Draining

WARNING: This page is about a different car, the 2015 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.

Special Tools And Workshop Equipment Required 

Draining

NOTE:

The "NOx reducing agent AUS 32" (AdBlue® ) is simply called reducing agent in the following information.

WARNING:
  • The reducing agent can irritate skin, eyes and the respiratory system.
  • If the fluid comes into contact with skin, rinse the affected area immediately with plenty of water.
  • If necessary, consult a physician.
NOTE:

The reducing agent tank is emptied through the filler neck.

CAUTION:

Make sure the reducing agent does not contact any clothing or the vehicle body.

If this occurs, wash immediately with clean water and then dry with a lint-free cotton cloth.

If the reducing agent has already crystallized, use warm water and a sponge.

Reducing agent that is not removed will crystallize and can damage the affected surface after a period of time.

WARNING:

Danger due to reducing agent leaking out.

The reducing agent tank filler opening is located in the luggage compartment to the right behind a cover.

-- Release and remove the cover -1-.

GWWN26-10811Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Open the reducing agent tank cap -2-.

Prepare the :VAS6557  as follows:

GWWN26-10449Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Close shut-off valves -A, B, and C-.

-- Connect the coupling -D- with the shut-off valve -A- connection.

GWWN26-10450Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Apply compressed air with a pressure hose.

-- Open the shut-off valve -A-.

This creates a vacuum in the :VAS6557  .

-- Close the shut-off valve -A- as soon as the pressure gauge indicates a vacuum 0.8 bar (11.6 psi).

-- Separate the coupling -D- from the shut-off valve -A- connection.

GWWN26-10450Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Stop the flow of compressed air to the compressed air hose.

-- Guide the hose -E- into the filler neck and all the way to the bottom of the reducing agent tank.

GWWN26-10449Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Open the shut-off valve -B-.

NOTE:

The vacuum in the :VAS6557  extracts the reducing agent from the tank. The :VAS6557  holds 11 liters (2.9 gallons). When this quantity is drained, it is possible to remove the reducing agent tank. Repeat the procedure if the reducing agent tank contains more reducing agent than that and it must be emptied completely.

-- To empty the :VAS6557  , hold the connection on the shut-off valve -C- over a suitable container and open the shut-off valves -A- and -C-.

CAUTION:

Do not reuse extracted reducing agent. Refer to Workshop Disposal for information on storage and disposal. Ask the importer about country-specific storage and disposal information.

-- Flush the :VAS6557  thoroughly with water after completing the procedure.

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