Connecting VAG 1551 Scan Tool

1998 Audi A8 Sedan (4D2) V8-3.7L (AEW)SECTION Connecting VAG 1551 Scan Tool



VAG 1551, Connecting And Selecting Function


NOTE: The VAG 1552 scan tool can be used instead of the VAG 1551, however no printout is possible.


Test requirements
- Battery Positive Voltage (B+) OK
- Supply voltage and fuses for respective system OK
- Ground (GND) connectors for transmission OK
- Check GND connections for corrosion and damage and repair if necessary.
- Check TCM GND connection per wiring diagram.
- Check battery GND strap and GND strap between battery and transmission.
- Selector lever in "P" position
- Parking brake applied
- Ignition switched off







- Connect VAG 1551 (VAG 1552) scan tool to 16-pin Data Link Connector (DLC) to left of steering column, using adapter cable VAG 1551/3.


NOTE:
- If nothing is shown on the display, check the power supply to the DLC.
- Additional operating instructions can be obtained by pressing the HELP button on the VAG 1551 scan tool.
- Press the -> button to advance through the program sequence.


Indicated on display 1)


V.A.G - ON BOARD DIAGNOSTIC HELP
1 - Rapid data transfer
2 - Blink code output



1) Operating modes 1 and 2 are displayed alternately

- Switch ignition on.
- Operate brake pedal one time.
- Press PRINT button to switch printer on (indicator light in button comes on).
- Press button -1- to select "Rapid data transfer" operating mode 1.

Indicated on display


Rapid data transfer HELP
Insert address word XX



NOTE:
- After address word 33 is inserted and confirmed with the -Q- button, the OBD program can begin. OBD functions Selectable Functions (Modes) Under Address Word 33, CARB/OBD II
- After address word 00 is inserted and confirmed with the -Q- button, the automatic test sequence can begin (the DTC memory for every system is checked). Stored malfunctions are displayed in sequence and printed out.


Indicated on display 1)


V.A.G - ON BOARD DIAGNOSTIC HELP
1 - Rapid data transfer
2 - Blink code output



1) Operating modes 1 and 2 are displayed alternately

- Press button -1- to select "Rapid data transfer" operating mode 1.

Indicated on display


Rapid data transfer HELP
Insert address word XX



- Press buttons -0- and -2- to insert "Transmission Electronics" address word 02.

Indicated on display


Rapid data transfer Q
02 transmission Electronics



- Press -Q- button to confirm input.

Indicated on display (control module identification)


8D0927156N AG5 01V 3,7l 2V US D74
Coding 00000 WSC 12345

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.