LEAK TEST PREPARATION FOR Driver Lumbar Support Adjustment Pump -V152- / Front Passenger Lumbar Support Adjustment Pump -V153- AND PRESSURE LINE

WARNING: This page is about a different variant/trim than selected.

NOTE:

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 .

Special tools and workshop equipment required

Vehicle Diagnostic Tester, not illustrated
Digital Pressure Sensor:V.A.G 1397B

Fig 1: Identifying Turbocharger Tester V. A. G 1397 A
Courtesy of AUDI
Pneumatic Repair Set:VAS 6618A , not illustrated

Procedure

Courtesy of AUDI

In one of the test steps in "Guided Fault Finding", there is a prompt to connect the Digital Pressure Sensor:V.A.G 1397B to the pneumatic line from the Driver Lumbar Support Adjustment Pump -V152- / Front Passenger Lumbar Support Adjustment Pump -V153-.

The backrest cover is removed. Refer to BACKREST COVER, REMOVING AND INSTALLING .

-- Disconnect the pneumatic line -1- for the Driver Lumbar Support Adjustment Pump -V152- / Front Passenger Lumbar Support Adjustment Pump -V153- at the following location. Refer to PNEUMATIC LINES, DISCONNECTING AND CONNECTING .

-a- = 80 mm

-- Using the hoses and adapter pieces from the Pneumatic Repair Set:VAS 6618A , connect the Digital Pressure Sensor:V.A.G 1397B to the pneumatic line -1- coming from the pump.

Courtesy of AUDI

NOTE:

To connect, insert the pneumatic lines into the Pneumatic Repair Set - Exterior Connector 5x3 :VAS 6618/3 from both sides -A arrows-.

Fig 2: Attach The Connecting Sleeves

Courtesy of AUDI

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

In one of the test steps in "Guided Fault Finding", there is a prompt to connect the Digital Pressure Sensor:V.A.G 1397B directly to the pump.

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

Courtesy of AUDI

Front seat released in the vehicle and folded toward the rear with the connectors connected. Refer to FRONT SEAT, REMOVING AND INSTALLING .

-- Disconnect and free up the pneumatic line at the pump. Refer to Removing .

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

-a- = 160 mm

-- Using the line and adapter pieces from the Pneumatic Repair Set:VAS 6618A , connect the Digital Pressure Sensor:V.A.G 1397B to the pneumatic line -2- for the pump -1-.

Courtesy of AUDI

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