VAG 1551 Scan Tool (ST), Connecting and Selecting Functions

VAS5051 tester or VAG1551 scan tool, connecting and selecting functions
Test requirements
^ Selector lever in position "P" and parking brake applied.
^ Vehicle voltage supply OK
^ Power supply and fuses for respective system OK
Refer to Power and Ground Distribution.
^ Ground (GND) connections and Ground point for transmission OK
Refer to Power and Ground Distribution.
^ Check Ground connections for corrosion and damage and repair if necessary.
^ Check battery Ground (GND) strap and Ground strap between battery and transmission.
^ Switch ignition off.





^ Connect VAS5051 tester to vehicle with VAS5051/1 diagnostic wire. Alternately, VAG1551 Scan Tool can also be attached using VAG1551/3 adapter.

Note: The DLC is located below the front knee bar at the left side.

WARNING!
^ When driving the vehicle for measurement and test purposes, vehicle diagnostic, testing and information system VAS5051/VAG1551 scan tool is always to be attached rear seat and operated from there.
^ Pay attention to safety precautions.

Note: The following description only explains implementation of On Board Diagnostic using VAG1551 Scan tool: When using the VAS5051 make sure the tester instructions are followed.





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

Notes:
^ Additional operating instructions can be retrieved by pressing the HELP key of VAG 1551.
^ The (arrow) key is used for advancing within the program sequence.
^ An automatic check (keys 00) can be carried out in the operating mode 1 "Rapid data transfer". Then all vehicle control modules will be checked automatically.

Refer to Scan tool operating instructions.
^ Switch on ignition.
^ Switch on printer with the Print key (indicator lamp in key lights up).
^ Press key 1 for "Rapid data transfer" mode.





Indicated on display:
^ Press keys O and 2. (Enter the address word "transmission electronics" with 02.)





Indicated on display:
^ Confirm entry with key Q.





Appears on display:
The control module identification is displayed:

Control module identification
Depending upon the software version, the control module may indicate a different control module identification, to that shown in the example.
^ 4B0927156 BT: Part number
^ AG5 01V: 5-speed automatic transmission 01V
^ 2.8l 5V: Engine version
^ USA: (country allocation), USA and CANADA
^ 1416: 14 = program version; 16 = data version
^ Coding 00002:
^ WSC 00000: Dealer number of VAG 1551, with which the last coding was performed





Indicated on display:
^ By pressing the HELP key, a list of possible fault causes is printed out.
^ After eliminating the possible causes of faults, again enter address word 02 for "transmission electronics" and confirm.
If "Control module does not answer!" again appears:





Indicated on display:
Check control module voltage supply.
^ Perform test step 1 of, Electrical check.
^ Check wiring connections to diagnostic sockets
Refer to Power and Ground Distribution.
^ Replace control module if necessary
^ Press (arrow) key.





Indicated on display:
^ After the HELP key is pressed, a list of the possible functions is printed out.





List of selectable functions 1 through 7





List of selectable functions 8

Further functions, which can be printed out by pressing the HELP key, can be disregarded.
^ After checking a function the VAG 1551 returns to the following start position:





Indicated on display: