DRC II system pressure check

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Special tools, testers and auxiliary items 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 process.

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 pressure greater than 0.5 bar (e.g. from a previous reading), bleeding must not be done.

Fig 1: Bleeding Pressure Gauge And Line Section

Courtesy of VOLKSWAGEN UNITED STATES, INC.

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

NOTE:

Illustration shows bleeding process by extracting hydraulic oil with hand vacuum pump 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 strut of respective DRC line.

NOTE:

To attach or detach charging device V.A.S 6209/2 , system line to be checked must be locked at central valve to limit the quantity of oil leaked to a minimum and to prevent pressurized central valve from emptying.

Remove wheel.

Fig 2: Removing/Installing Plastic Cover

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove plastic cover - 1 -.

Fig 3: Loosening Lock Nut On Line To Be Checked & Screwing In Shut-Off Screw Until It Is Hand Tight

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Loosen lock nut - 1 - on line to be checked, screw in shut-off screw - 2 - until it is hand tight and lock nut - 1 - again.

Fig 4: Reading System Pressure At Charging Device V.A.S 6209/2

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove dust cap and connect charging device V.A.S 6209/2.

Fig 5: Locating Lock Nut On Line To Be Checked & Screwing In Shut-Off Screw Until It Is Hand Tight

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Loosen lock nut - 1 - on line to be checked, unscrew shut-off screw - 2 - until it is hand tight and lock nut - 1 - again.

Fig 6: Reading System Pressure At Charging Device V.A.S 6209/2

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Read system pressure at charging device V.A.S 6209/2.

NOTE:

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

Fig 7: Locating Lock Nut On Line To Be Checked & Screwing In Shut-Off Screw Until It Is Hand Tight

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Loosen lock nut - 1 - on line to be checked, screw in shut-off screw - 2 - until it is hand tight and lock nut - 1 - again.

Fig 8: Disconnecting Charging Device V.A.S 6209/2 And Installing Dust Cap

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Disconnect charging device V.A.S 6209/2 and install dust cap.

Fig 9: Locating Lock Nut On Line To Be Checked & Screwing In Shut-Off Screw Until It Is Hand Tight

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Loosen lock nut - 1 - on line to be checked, unscrew shut-off screw - 2 - until it is hand tight and lock nut - 1 - again.

NOTE:

Small oil leak which results from connecting or disconnected charging device 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 V.A.S 6209/2 is connected. Every connection results in a pressure decrease of approx. 0.3 bar from the previous reading. In this way, multiple repeats of measurements cause pressure to fall below minimum level or malfunction.

If pressure is not OK, determine cause of malfunction and service system.

Fig 10: Removing/Installing Plastic Cover

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Install plastic cover - 1 -.

DRC system pressure values

Pressure values are based on a reference temperature of 20°C.

16 bar = maximum pressure
15 - 16 bar = Central valve new or in like new condition
12 - 15 bar = Normal range of operation, system OK
12 bar = System leaking or not filled completely, air entering system, central valve faulty.