Preparations For Compressor And Pressure Line Leak Check

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 

• Digital Pressure Sensor: VAG1397B 
• Hose Cutting Pliers: VAS6228 
• Pneumatic Repair Set: VAS6618 A 
• Vehicle Diagnostic Tester

Procedure 

-- Remove the outer single seat. Refer to SINGLE SEAT, REMOVING AND INSTALLING .

• To check, the pneumatic line from the compressor is not disconnected at the connection, but is disconnected by the described procedure. Refer to PNEUMATIC LINES, DISCONNECTING AND CONNECTING .

-- To connect during the leak test, insert the pneumatic lines into the : VAS6618/2  from both sides -A arrows-.

Fig 1: Attach The Connecting Sleeves

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-- 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 : VAG1397A  at the pneumatic line from the compressor -1- to the Valve Block 1 in Driver Side Rear Seat - N479- / Valve Block 1 in Passenger Side Rear Seat - N481- -item 2-.

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-- Disconnect the pneumatic line -arrow- to the valve block.

-- Using hoses and adapter pieces from the : VAS6618A  , connect the : VAG1397A  to the pneumatic line -1- coming from the compressor.

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2 -  Valve Block - N479- /Valve Block - N481-

TIP:

To connect the pneumatic lines, make an adapter hose from the : VAS6618 A  .

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