Connecting VAG 1551 Scan Tool

V.A.G 1551 Scan Tool, connecting and selecting engine control module
Test conditions

- Fuse for engine electronics OK.
- Fuel pump relay OK
- Battery voltage at least 11 V
- Ground connections on engine and transmission OK.
- Switch ignition off.







- Connect V.A.G 1551 Scan Tool with diagnostic adapter V.A.G 1551/3A.

In the automatic test sequence function (address word 00), the K-wire adapter VAS 6017 must also be used on vehicles as of model year 2002.

NOTE: The Data Link Connector (DLC) is located in below the instrument panel to the left of the steering column.

WARNING:
- When driving the vehicle for measurement and test purposes, always secure the VAS 1551 Scan Tool on the rear seat only and operate it from this position (Second person required).
- Observe the safety precautions.

NOTE: The following describes On Board Diagnostic (OBD) using the V.A.G 1551 Scan Tool only.

Indicated on display


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

*Displays appear alternately

- If no display appears, check diagnostic wires:

Depending on the function required:

- Switch ignition on.
or
Start engine, "Selectable functions" table.
- Switch on printer using Print button (Warning lamp in switch illuminates).
- Press key 1 for "Rapid data transfer".

Indicated on display


Rapid data transfer HELP
Enter address word XX


- Press keys 0 and 1 for address word "Engine electronics" and press the Q key to confirm entry.


Rapid data transfer Q
01 - Engine electronics


If the display shows one of the messages, run through the procedure as described in the Scan Tool instruction program.

Rapid data transfer HELP
No reply from control module


Rapid data transfer HELP
K-wire not switching to ground


Rapid data transfer HELP
K-wire not switched to positive


The display on V.A.G 1551 Scan Tool shows the control module identification code e.g.:


4B0907558.. 4.2l V8/5V G D.. ->
Code 11752 WSC 06388


- 4B0907558... Control module number (current control module version - see Parts list)
- 4.2 L Engine capacity
- V8 / 5V Type of engine (V engine, 8-cyl., 5-valve)
- G "G" appears in vehicles with cruise control system
- D... Control module software version
- Code 11752 Coding of engine control module.

- WSC 06388 Workshop Code from V.A.G 1551 which was used to perform the last coding

NOTE:
- Incorrect coding may lead to higher emissions and increased strain on the automatic transmission resulting from harsh gearshift jolts.
- A wrong coding also leads to storing of nonexistent DTCs in the DTC memory.

If the coding differs from the vehicle version, then:

- Check engine control module coding, code engine control module.
- Press key.

Indicated on display


WAUZ4DZYN000126 AUZ7ZOW0801181


- WAUZZZ4DZXN002341: 17-digit vehicle identification no. (Vehicle Identification Number)
- AUZ7Z0X0590944: 14-digit identification number for immobilizer control module
- Press key.

Indicated on display:


Rapid data transfer HELP
Select function XX


NOTE: Press HELP key to obtain a printout of available functions.