Preparations For Compressor And Pressure Line Leak Check, H O RBIGER MULTICONTOUR Seat

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Special tools and workshop equipment required

Turbocharger Tester Kit VAG 1397A
Pneumatic Repair Set VAS 6618 A
Vehicle Diagnostic Tester

NOTE:

When an appropriate entry is made in the event memory, you are prompted 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 front seat.

For the connection diagram with assignment of the pneumatic lines to the air cushions, refer to CONNECTION DIAGRAM - PNEUMATIC SYSTEM .

Procedure

Fig 1: Check Valve & Pneumatic Line

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The backrest cover is removed. Refer to Removing and Removing .
Front seat released in the vehicle and folded forward with electrical harness connectors connected FRONT SEAT, REMOVING AND INSTALLING .

Version with a separate check valve and restrictor on the multicontour seat control module:

-- Disconnect the pneumatic line to the Driver Multicontour Seat Control Module -J873- / Front Passenger Multicontour Seat Control Module -J872- by pressing release ring on the check valve -1- -arrow A- and simultaneously removing the pneumatic line -2- -arrow B-.

-- Using hose and adapter pieces, as well as the Surge Tank VAS 6618/10, connect the Turbocharger Tester Kit VAG 1397A with the pneumatic line coming from the compressor to the check valve -1-.

Fig 2: Check Valve

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Version with an Integrated Check Valve and Restrictor in the Multicontour Seat Control Module:

Fig 3: Pneumatic Line

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NOTE:

The pneumatic line must be disconnected from the multicontour seat control module with an integrated check valve and restrictor.

-- Disconnect the pneumatic line -1- to the Driver Multicontour Seat Control Module -J873- / Front Passenger Multicontour Seat Control Module -J872- at the following location (refer to PNEUMATIC LINES, DISCONNECTING AND CONNECTING ):

a - 50 mm

-- Using hose and adapter pieces, as well as the Surge Tank VAS 6618/10, connect the Turbocharger Tester Kit VAG 1397A with the pneumatic line coming from the compressor.

Fig 4: Attach Connecting Sleevevas6618/3 -Item

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-- To connect, attach the Connecting Sleeve VAS 6618/3 -item 1- to the pneumatic line.

Continuation for all Versions:

Fig 5: Attach The Connecting Sleeves

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NOTE:

To connect, insert the pneumatic lines into the Connecting Sleeves VAS 6618/3 from both sides -A arrows-.

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

In one of the test steps in the "Guided Fault Finding", you are prompted to connect the Turbocharger Tester Kit VAG 1397A at the pneumatic line to the Valve Block 1 in Driver Seat -N475- / Valve Block 2 in Driver Seat -N476- or Valve Block 1 in Front Passenger Seat -N477- / Valve Block 2 in Front Passenger Seat -N478-.

Fig 6: Disconnect The Pneumatic Lines

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-- Carefully release the retainer -arrow- and disconnect the pneumatic lines -1- and -2-.

-- Using hose and adapter pieces, as well as the Surge Tank VAS 6618/10, connect the Turbocharger Tester Kit VAG 1397A with the pneumatic line -1- coming from the compressor.

Fig 7: Pneumatic Line

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-- Repeat the check on the pneumatic line coming from the compressor at the opposing valve block.

In one of the test steps in the "Guided Fault Finding", you are prompted to connect the Turbocharger Tester Kit VAG 1397A directly to the compressor.

Fig 8: Release The Retainer, Remove The Pneumatic Line From Compressor

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-- Carefully release the retainer -arrow- and remove the pneumatic line -1- from the compressor -2-.

NOTE:

Ignore -item 3-.

-- Using hose and adapter pieces, as well as the Surge Tank VAS 6618/10, connect the Turbocharger Tester Kit VAG 1397A with the compressor -1-.

Fig 9: Connect Turbocharger Tester Kit VAG 1397A With Compressor

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