Connecting and Selecting Functions

VAS5051 tester or VAG1551 scan tool, connecting and selecting functions
Test requirements:
^ Battery voltage at least 11 V
^ Ground (GND) connections at engine and transmission OK
^ Engine off
^ Automatic in position "P" or "N"

Work sequence

^ Connect VAS5051 tester with VAS5051/1 diagnostic wire with the ignition switched off. Alternately, VAG1551 Scan Tool (ST) can also be attached using VAG5051/3A adapter.

Note: The following description only explains implementation of On Board Diagnostic using VAG1551 Scan tool. When using the VAS5051 tester, observe instructions in the tester's user manual.

Indicated on display:
1) Operating modes 1 and 2 are displayed alternately

Note: If nothing appears in display:

Operating instructions for Scan Tool (ST)

^ Switch ignition on.
^ Switch off level control system manually (pressing button twice > 5 seconds on manual control head)
^ Press -Print- button to turn on Scan Tool (ST) printer. Indicator lamp in button must light up.
^ Press button 1 to select "Rapid data transfer" operating mode 1.

When indicated on display:

Note: The address word 00 initiates file automatic test sequence, i.e. it results in a DTC check on all OBD capable systems in the vehicle via rapid data transfer.

^ Press "34" for address word "Level control system".

Indicated on display:
^ Press -Q- button to confirm input

Indicated on display:

Indicated on display after approximately 5 seconds:
^ Press button.

Indicated on display:

Note: Pressing the -HELP- button will print out an overview of all of the possible functions.

^ Press button -1- twice for the "Login procedure" and press -Q- button to confirm input.

Indicated on display:
^ Press -Q- button to confirm input

Indicated on display:
^ Press button 0, 8, 3, 6 and 7.

Indicated on display:
^ Press -Q- button to confirm input

When indicated on display:
^ Press buttons -0- and -4-

When indicated on display:
^ Press -Q- button to confirm input

When indicated on display:
^ Enter display group number.
^ Press buttons -0-, -2- and -0-.
^ Press -Q- button to confirm input

When indicated on display:
^ Press button to continue

When indicated on display:

Note:
^ Press -4- button to return to GE 20

For indication on display after expiration of 65 seconds or pressure lower than 3.5 bar in pressure reservoir:

Note: However, the venting procedure can be aborted prematurely by exiting the display group number.

^ Press button to continue

When indicated on display:
^ Press button to continue

When indicated on display:

Note:
^ Press button to return to GE 22

When indicated on display:
^ Press button to continue

When indicated on display:

Note:
^ Press button to return to GE 24

For indication on display after expiration of 65 seconds or pressure lower than 3.5 bar in pressure reservoir:

Note: However, the venting procedure can be aborted prematurely by exiting the display group number.
If the residual retaining pressure of 3.5 bar is not reached after expiration of 65 seconds, the message "... venting function aborted" appears instead of the message "venting function done".

^ Disconnect diagnostic cable from Data Link Connector (DLC)
Other filling procedures can follow according to the above mentioned scheme. the order (venting air springs - front axle, air springs -rear axle, pressure reservoir) can be specified as desired.

Note that upon exiting the filling mode, the regulation still remains manually switched off, as long as it is not switched on or a speed of v > 15 km/h is recognized.