DRC system pressure test — AUDI

🧭 Before you start

Fits: Audi A6 C6 (4F, 2004–2011)

• Opens: power steering fluid

Don't miss

• The illustration shows the bleeding method involving drawing in hydraulic fluid with hand vacuum pumpVAS 6213.
• The pressure at pressure tester V.A.S 6209/2 only builds up gradually; the process takes approx. 2 minutes. Do not read off the system pressure until the gauge needle of V.A.S 6209/2 has finally come to rest.

🔩 Torque settings

Values can differ between engine variants — check the code stamped on your block.

ℹ️ Always cross-check the exact figure against your vehicle's factory manual before final tightening — a wrong torque can damage the engine. These values are extracted from workshop data and may not cover every variant or revision.

📋 Procedure

1. Set up special tools as illustrated in order to bleed pressure gauge (B) and connecting line (A). [Note: The illustration shows the bleeding method involving drawing in hydraulic fluid with hand vacuum pumpVAS 6213.]
2. Continue bleeding until no more air bubbles are visible in hose (C).
3. Disconnect hoses (C) and (D) and perform system pressure test. [Note: When connecting and disconnecting pressure tester V.A.S 6209/2, the section of the system that is under test must be closed off at the central valve in order to minimise the fluid loss and to avoid discharging the central valve that is under pressure.]
4. Remove wheel.
5. Detach plastic cover by unscrewing nuts (arrows) and removing clip (1).

6. Slacken lock nut (1) for the section of the system that is to be tested. Screw in cut-off screw (2) hand-tight as far as stop and tighten lock nut (1) again.
7. Unscrew dust cap from drain/charge valve and connect pressure tester V.A.S 6209/2.
8. Slacken lock nut (1) for the section of the system that is to be tested. Unscrew cut-off screw (2) as far as stop (hand-tight) and tighten lock nut (1) again.
9. Read off system pressure at pressure tester V.A.S 6209/2. [Note: The pressure at pressure tester V.A.S 6209/2 only builds up gradually; the process takes approx. 2 minutes. Do not read off the system pressure until the gauge needle of V.A.S 6209/2 has finally come to rest.]
10. Slacken lock nut (1) for the section of the system that is to be tested. Screw in cut-off screw (2) hand-tight as far as stop and tighten lock nut (1) again.
11. Disconnect pressure tester V.A.S 6209/2 and screw on dust cap.
12. Slacken lock nut (1) for the section of the system that is to be tested. Unscrew cut-off screw (2) as far as stop (hand-tight) and tighten lock nut (1) again. [Note: When connecting and disconnecting pressure gauge V.A.S 6209/2, a small amount of fluid will always escape at the connection, but this is not critical. Repeated measurements should be avoided because the system loses a small amount of fluid every time the pressure tester V.A.S 6209/2 is connected. The pressure reading will be about 0.3 bar lower than the previous value when the gauge is reconnected. Several repeated measurements will thus cause the pressure in the system to drop below the minimum limit, or can cause failure of the system.]
13. If the pressure is not OK, trace the cause of the fault and repair the system.
14. Install plastic cover.
15. Nuts (arrows) 2 Nm — 2 Nm (1.5 lb-ft)

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