Preparations For Compressor and Pressure Line Leak Check

Preparations for Compressor and Pressure Line Leak Check

• When an appropriate entry is made in the event memory, you are prompted in "Guided Fault Finding" to perform a leak check. Refer to Vehicle diagnostic tester.

• Then the preparations for this leak test are described that must be carried out directly in the front seat.

• Connection diagram with assignment of the pneumatic lines to the air cushions. Refer to => [ Pneumatic Components on Multi-contour Seat, Connection Diagram ] Pneumatic Components on Multi-Contour Seat, Connection Diagram.

Procedure






• The backrest cover must be removed. Refer to => [ Backrest Cover ] Backrest Cover.

• Front seat released in the vehicle and folded forward with electrical harness connectors connected. Refer to => [ Power Standard Seat/Sport Seat/Super Sport Seat ] Power Standard Seat/Sport Seat/Super Sport Seat.

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

- Disconnect pneumatic line to the multi-contour seat control module (J873) / (J872) by pressing release ring on the check valve - 1 - - arrow A - and simultaneously removing pneumatic line - 2 - - arrow B -.

- Connect the turbocharger tester (V.A.G 1397A) to the pneumatic line from the compressor to the check valve - 1 - using the hose, the adapter from the surge tank (VAS 6618/10).






Version with a integrated check valve and restrictor in the multicontour seat control module:






• The pneumatic line must be disconnected from the multicontour seat control module with an integrated check valve and restrictor. Refer to the => Parts Catalog.

- Disconnect the pneumatic line - 1 - to the multicontour seat control module (J873) / (J872) must be disconnected at the following location. Refer to => [ Disconnecting and Connecting Pneumatic Lines ] Disconnecting and Connecting Pneumatic Lines:

a 50 mm

- Connect the turbocharger tester (V.A.G 1397A) to the pneumatic line from the compressor using the hose, the adapter from the surge tank (VAS 6618/10).






- To connect, attach the connector (exterior) 5 x 3 (VAS 6618/3) - 1 - to the pneumatic line.

Continuation for all versions:






• For the connection, insert pneumatic lines in the connecting sleeves (VAS 6618/3) of 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 (V.A.G 1397A) at the pneumatic line to the valve blocks (N475) / (N476) or (N477) / (N478).






- Carefully release latch - arrow -, disconnect pneumatic lines - 1 - and - 2 -.

- Connect the turbocharger tester (V.A.G 1397A) to the pneumatic line from the compressor - 1 - using the hose, the adapter from the surge tank (VAS 6618/10).






- 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 (V.A.G 1397A) directly to the compressor.






- Carefully release latch - arrow -, remove pneumatic line - 1 - from the compressor - 2 -.

• Ignore - 3 -.

- Connect the turbocharger tester (V.A.G 1397A) to the compressor - 1 - using the hose and adapter from the surge tank (VAS 6618/10).






- Connect pneumatic lines following the leak check. Refer to => [ Disconnecting and Connecting Pneumatic Lines ] Disconnecting and Connecting Pneumatic Lines.