Connecting and Operating VAG 1551 Scan Tool

REQUIREMENTS
- Battery Positive Voltage (B+) OK.
- Fuse no. 22 (S22) OK.
- Ground (GND) connections for engine and transmission, which are located below lower part of intake manifold, are OK.

VAG 1551 CONNECTING
For access to the Data Link Connector (DLC):

- Unclip cover for Data Link Connectors under heating/ventilation controls.



- Connect VAG 1551 Scan Tool (ST) with VAG 1551/1 adapter harness.
- First connect black connector from VAG 1551/1 adapter harness to black Data Link Connector.

^ Indicated on display:

VAG ON BOARD DIAGNOSTIC HELP
1-Rapid data transfer
2-Blink Code Output

NOTE:
- Operating modes 1 and 2 are displayed alternately.

- If no display appears, do not connect the white connector. In this case, check the voltage supply for the VAG 1551 Scan Tool.

- Connect white connector from VAG 1551/1 adapter harness to white Data Link Connector (blue connector is not used).




SELECTABLE FUNCTION TABLE

- Depending on which function is required; either switch ignition ON, or start engine and let idle.

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.

- Operate VAG 1551 Scan Tool according to information and instructions on the display.
- 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.
- Motronic Engine Control Module (ECM) identification will be displayed.

037 906 258 T MOTOR
Coding 1

Example:
^ 037 906 258 T = Part No. of Motronic Engine Control Module.
^ Coding 1 = Coding version.

NOTE:
- Correct Motronic Engine Control Module number and coding are displayed only with the engine running at idle speed (Closed Throttle Position).

- ECM Coding varies according to application. For the latest information, contact the Parts Department.

Coding:
1 - Manual transmission without Exhaust Gas Recirculation (EGR).
2 - Automatic transmission without EGR.
3 - Manual transmission with EGR.
4 - Automatic transmission with EGR.

- If "Control Module does not answer" appears in the display, the possible cause of the malfunction can be printed out by pressing the HELP button.
- After repairing the possible causes of the malfunction, press the -0- and -1- to again enter address word 01 for Engine Electronics.
- Press the -Q- button to confirm input.
- Press the --> button.

^ Indicated on display:

Rapid data transfer HELP
Select function XX