Preparations, Checking Lumbar Support Air Cushion And Seat Bolster Inflation Adjuster For Leaks
- When an appropriate entry is made in the event memory, there is a prompt in"Guided Fault Finding" to replace the faulty lumbar support air cushion using the Pneumatic Repair Set - Surge Tank :VAS 6618/10 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, COMFORT SEATS .
Special tools and workshop equipment required
- Vehicle Diagnostic Tester
- Pneumatic Repair Set :VAS 6618 A
Procedure
- The backrest cover is removed. Refer to BACKREST COVER, REMOVING AND INSTALLING, STANDARD/SPORT SEAT .
-- Before disconnecting, mark the allocation of the pneumatic lines to each other using a waterproof felt-tip pen.
-- Disconnect the pneumatic line that runs to the faulty air cushion at the location marked with the -arrow-.
- Wiring connectors applied as an addition may not be opened another time.
- If a pneumatic line at a seat must be disconnected, and a wiring connector was already placed on it at an earlier time, then the new wiring connector must be set approximately 30 mm away from the existing separating point.
To identify them more easily, the pneumatic lines are shown in color in the illustration and the table. The actual lines are not these colors.
| Item | Color | To Component |
|---|---|---|
| 1 | Blue | Left Backrest Bolster Inflation Adjuster |
| 2 | Yellow | Left seat bolster |
| 3 | Yellow | Right seat bolster |
| 4 | Blue | Right Backrest Bolster Inflation Adjuster |
| 5 | Green | Lower lumbar support |
| 6 | Red | Center lumbar support |
| 7 | Blue | Upper lumbar support |
| 8 | Black | Supercharger |
-- To connect, attach the connecting sleeves from the Pneumatic Repair Set Pneumatic Repair Set :VAS 6618 to the pneumatic lines.
- To connect, insert the pneumatic lines in the Pneumatic Repair Set - Exterior Connector 6x4 :VAS 6618/2 from both sides -A arrows-.
- To release, push the release rings -B arrows- and simultaneously remove pneumatic lines -C arrows-.
-- Connect the Pneumatic Repair Set - Surge Tank :VAS 6618/10 on the lines to the air cushion.
TIP:
The illustration shows checking the right seat bolster.
-- Connect the pneumatic lines following the leak test. Refer to PNEUMATIC LINES, DISCONNECTING AND CONNECTING .