Preparations For Checking Lumbar Support Air Cushion For Leaks

Preparations for Checking Lumbar Support Air Cushion for Leaks

Special tools, testers and auxiliary items required

• Repair kit, pneumatics (VAS 6618)

• 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.

- Before disconnecting, mark the assignment of the pneumatic lines to each other using a waterproof permanent marker.

• If only one error is displayed for an air cushion, it suffices to disconnect only 2 pneumatic lines at the described points.

- Disconnect pneumatic lines to the lumbar support air cushions at the following points. Refer to => [ Disconnecting and Connecting Pneumatic Lines ] Disconnecting and Connecting Pneumatic Lines:

a 40 mm
b 40 mm
c 40 mm

- For checking in the "Guided Fault Finding", connect the air cushion and valve block connections in a diagonal sequence as follows:











- For the connection, attach connecting sleeve (VAS 6618/2) to the pneumatic lines.






• For the connection, insert pneumatic lines in the connecting sleeves (VAS 6618/2) of both sides - A arrows -.

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

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