Leak Detection Pump, Checking Vacuum Supply

WARNING: This page is about a different variant/trim than selected.

Special tools and workshop equipment required

Turbocharger Tester V.A.G 1397 A
T Connection 251 201 346
6 mm Hose

NOTE:

Leak detection pump -V144- installed location:

GTI: Inside the right rear wheel housing, under the liner.

Eos: Behind the right rear wheel.

GTI:

-- Remove the right rear wheel and wheel housing liner.

-- Disconnect the vacuum line -1- from the leak detection pump.

Fig 1: Connecting Turbocharger Tester V.A.G 1397A With T-Piece And 6 mm Dia. Hose Between Vacuum Line And Leak Detection Pump (LDP) V144

Courtesy of VOLKSWAGEN UNITED STATES, INC.

-- Connect the turbocharger tester V.A.G 1397 A with the T piece and 6 mm hose between the vacuum line -1- and the leak detection pump -2-.

Eos:

-- Disconnect the vacuum line -1- from the leak detection pump.

Fig 2: Connecting Turbocharger Tester V.A.G 1397A With T-Piece And 6 mm Dia. Hose Between Vacuum Line And Leak Detection Pump (LDP) V144

Courtesy of VOLKSWAGEN UNITED STATES, INC.

-- Connect the turbocharger testerV.A.G 1397A with the T piece and 6 mm hose between the vacuum line -1- and the leak detection pump -2-.

Continuation for all Vehicles:

-- Turn on measuring range I (absolute pressure measurement).

-- Connect the vehicle diagnostic tester and start the engine.

-- Select Guided Functions

-- Select "Check tank ventilation system for leaks".

-- Start the test.

-- While the test is running, observe the display on the turbocharger testerV.A.G 1397A.

The pressure must pulsate and must not rise above 0.700 bar (absolute pressure) during the test.

-- If the pressure rises above 0.700 bar during the test, the vacuum supply is too low. Check the vacuum line to the intake manifold for kinks or blockages.