Connecting and Selecting Function

VAG 1551 Scan Tool (ST), Selecting Function

Test Requirements:
^ Battery Positive Voltage (8+) OK
^ Fuse 22 (S22) OK
^ Ground (GND) connections on engine and transmission OK (location: below lower part of intake manifold)

- Connect VAG 1551 Scan Tool (ST) with adapter harness.

Depending on function desired:
- Switch ignition ON.
- Start engine (except functions 03 - Output Diagnostic Test Mode or 04 - Basic Setting)

Note:
^ Additional operating instructions can be printed out by pressing the HELP button on the VAG 1551 Scan Tool.
^ The => button advances the Scan Tool program sequence.

- Press button -1- for "Rapid data transfer" operating mode.

- Indicated on display

[Rapid data transfer HELP ]
[Insert address word XX ]

- Press buttons -0- and -1- (01 enters the address word for the vehicle system to be tested, "Engine Electronics")

- Indicated on display

[Rapid data transfer Q ]
[01 - Engine Electronics ]

- Press -Q- button to confirm input.

- Mono-Motronic Engine Control Module identification will be displayed (example: 1 HO 907 311G 1.8l RE MONO, coding 1, version number D11).

[1 HO 907 311G 1.8l RE MONO D11 ]
[Coding 01 ]

Note: Correct control module number and coding are displayed only at closed throttle position.

- If "Control module does not answer" appears in the display, the possible causes of the malfunction can be printed out by pressing the HELP button.

[Rapid data transfer HELP ]
[Control module does not answer! ]


After repairing the possible causes at the malfunction:

- Press buttons -0- and -1- to again enter address word 01 for "Engine Electronics"

- Press -Q- button to confirm input.

- Press => button

- Indicated on display

[Rapid data transfer HELP ]
[Select function XX ]

Note: If you want to select function 02 "Read DTC Memory"; switch the printer ON with the PRINT button (indicator lamp on the button lights up). With the printer ON, the stored malfunctions (Diagnostic Trouble Codes or DTCs) are automatically displayed and printed out in sequence.

Selectable Functions: