Driver Multi-Contour Seat Compressor -V439- /Front Passenger Multi-Contour Seat Compressor -V440- AND PRESSURE LINE, PREPARATIONS FOR LEAK CHECK

Special tools and workshop equipment required 

• Vehicle Diagnostic Tester
• Digital Pressure Sensor: VAG1397B 
  Fig 1: Identifying Turbocharger Tester V.A.G 1397 A

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• Pneumatic Repair Set: VAS6618  with Adapter: VAS6618/11  , not illustrated

• When an appropriate entry is made in the event memory, there is a prompt in "Guided Fault Finding"  to perform a leak check using the Vehicle Diagnostic Tester.
• Then the preparations for this leak test are described that must be carried out directly in the seat.
• Connection diagram with assignment of the pneumatic lines to the air cushions. Refer to CONNECTION DIAGRAM - PNEUMATIC SYSTEM .

Procedure 

• The backrest cover is removed. Refer to BACKREST COVER, REMOVING AND INSTALLING .
• In one of the test steps in "Guided Fault Finding"  , there is a prompt to connect the Digital Pressure Sensor: VAG1397B  to the pneumatic line from the Driver Multi-Contour Seat Compressor -V439- / Front Passenger Multi-Contour Seat Compressor -V440-.
• To connect, insert the pneumatic lines into the Pneumatic Repair Set - Exterior Connector 5x3: VAS6618/3  from both sides -A arrows-.
  Fig 2: Attach The Connecting Sleeves

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• To release, push the release rings -B arrows- and simultaneously remove pneumatic lines -C arrows-.

-- Disconnect the pneumatic line -1- to the Driver Multi-Contour Seat Compressor -V439- /Front Passenger Multi-Contour Seat Compressor -V440- at the marking -arrow-. Refer to PNEUMATIC LINES, DISCONNECTING AND CONNECTING .

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-- Using a hose and coupling from the Pneumatic Repair Set: VAS6618A  , connect the Digital Pressure Sensor: VAG1397B  to the pneumatic line -1- from the compressor.

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In one of the test steps in "Guided Fault Finding"  , there is a prompt to connect the Digital Pressure Sensor: VAG1397B  directly to the compressor.

• Bolts removed from the front seat in the vehicle and folded toward the rear with the connectors still connected. Refer to FRONT SEAT, REMOVING AND INSTALLING .

-- Disconnect the pneumatic line -2- from the compressor -1- at the following locations. Refer to PNEUMATIC LINES, DISCONNECTING AND CONNECTING .

Fig 3: Driver Multi-Contour Seat Compressor -V439- /Front Passenger Multi-Contour Seat Compressor -V440-

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• -a- = 160 mm

-- Using the line and adapter pieces from the Pneumatic Repair Set: VAS6618A  , connect the Digital Pressure Sensor: VAG1397B  to the pneumatic line -2- for the pump -1-.

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-- Connect the pneumatic lines following the leak test. Refer to PNEUMATIC LINES, DISCONNECTING AND CONNECTING .