Dynamic Ride Control System Pressure Test

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Special Tools And Workshop Equipment Required

Charging device:V.A.S 6209/2
Hand vacuum pump:VAS 6213

Bleed charging device :V.A.S 6209/2

Use only approved oil for the bleeding procedure.

NOTE:

Charging device :V.A.S 6209/2 must always be bled at initial use.

If charging device :V.A.S 6209/2 still shows a residual pressure greater than 0.5 bar (e.g. from a previous reading), bleeding must not be done.

-- To bleed pressure gauge -B- and line section -A-, install special tool as shown in illustration.

Fig 1: Bleeding Pressure Gauge And Line Section

Courtesy of AUDI OF AMERICA, LLC

NOTE:

Illustration shows bleeding process by extracting hydraulic oil with :VAS 6213

-- Bleed process must be performed until air bubbles are no longer visible in hose -C-.

-- Disconnect hose -C- and -D- and perform system pressure check.

System Pressure Check Is Performed On Front Shock Absorber Of Corresponding DRC Line.

Fig 2: Connecting V.A.S 6209/2 And Remove Dust Cap

Courtesy of AUDI OF AMERICA, LLC

-- Remove the cap from the extract/fill valve and connect the :V.A.S 6209/2 .

-- Read system pressure at :V.A.S 6209/2 .

Fig 3: Connecting V.A.S 6209/2 And Remove Dust Cap

Courtesy of AUDI OF AMERICA, LLC

NOTE:

Pressure increase at :V.A.S 6209/2 occurs slowly and takes approximately 2 minutes. DRC system pressure can only be read when :V.A.S 6209/2 needle has finally come to a stop.

-- Disconnect :V.A.S 6209/2 and install dust cap.

Fig 4: Connecting V.A.S 6209/2 And Remove Dust Cap

Courtesy of AUDI OF AMERICA, LLC

NOTE:

Small oil leak which results from connecting or disconnected :V.A.S 6209/2 at connection is not critical. Avoid repeating measurements because a small quantity of oil is removed from the system every time the :V.A.S 6209/2 is connected. Every connection results in a pressure decrease of approximately 0.3 bar from the previous reading. Multiple repeated measurements decrease system pressure below minimum pressure or failure.

-- If the pressure is not OK, determine the cause and service the system.

DRC System Pressure Values

Pressure Values Refer To Reference Temperature Of 20 °C (68 °F).

20 bar (290 PSI) = operating pressure
19 - 20 bar (276 - 290 PSI) = central valve new or as good as new.
18 - 19 bar (261 - 276 PSI) = normal range of operation, system OK.
< 18 bar (261 PSI) = system leaking or not filled completely, air entering system, central valve has no pressure/is empty.