Dynamic Ride Control (DRC) System Pressure, Checking

WARNING: This page is about a different car, the 2024 Audi A4 allroad. However, it is still accessible from the selected car via links, so may be relevant.

Special tools and workshop equipment required

DRC Pressure Tester:VAS 6209/2 , not illustrated
Hand Vacuum Pump:VAS 6213

Fig 1: Hand Vacuum Pump VAS 6213
Courtesy of AUDI OF AMERICA, LLC

DRC Pressure Tester:VAS 6209/2 , Bleeding

Use only approved oil for the bleeding procedure. Refer to the Parts Information.

NOTE:

The DRC Pressure Tester:VAS 6209/2 must always be bled the first time it is used.

If the DRC Pressure Tester:VAS 6209/2 still shows a residual pressure greater than 0.5 bar (7.25 psi) (for example, from a previous reading), bleeding must not be done.

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

Fig 2: Bleeding Pressure Gauge And Line Section

Courtesy of AUDI OF AMERICA, LLC

NOTE:

The illustration shows the bleeding procedure by extracting hydraulic fluid using a Hand Vacuum Pump:VAS 6213 .

-- The bleeding procedure must be performed until air bubbles are no longer visible in hose -C-.

-- Disconnect hose -C and D-.

System Pressure Test

Fig 3: Identifying Cap & Extract/Fill Valve

Courtesy of AUDI OF AMERICA, LLC

NOTE:

System pressure check is performed on front shock absorber of corresponding DRC line.

-- Remove the cap -arrow- from the extract/fill valve and connect the DRC Pressure Tester:VAS 6209/2 .

-- Read the system pressure on the DRC Pressure Tester:VAS 6209/2 .

NOTE:

The pressure on the DRC Pressure Tester:VAS 6209/2 increases slowly and takes approximately two minutes. The DRC system pressure can only be read when the needle on the DRC Pressure Tester:VAS 6209/2 has finally come to a stop.

-- Disconnect the DRC Pressure Tester:VAS 6209/2 and install the dust cap.

NOTE:

A small oil leak at the connection that results from connecting or disconnecting the DRC Pressure Tester:VAS 6209/2 is not critical. Multiple measurements should be avoided since the system loses a small amount of oil each time the DRC Pressure Tester:VAS 6209/2 is connected. Every connection results in a pressure decrease of approximately 0.3 bar (4.35 psi) 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).

16 bar (232.06 psi) = operating pressure
15 bar to 16 bar (217.56 psi to 232.06 psi) = central valve new or as good as new
14 to 15 bar (203.05 to 217.56 psi) = normal range of operation, system OK
Less than 14 bar (203.05 psi) = system leaking or not filled completely, air entering system, central valve has no pressure/is empty.