Connecting VAG 1551 Scan Tool

VAS5051 vehicle diagnostic, testing and information system or VAG1551 Scan Tool (ST), connecting and selecting functions

Test requirements:
- Fuses for engine electronics OK
- Fuel Pump (FP) OK, checking. Testing and Inspection
- Battery voltage at least 12.7 V
- Ground (GND) connections at engine and transmission OK

Procedure







- Connect VAS5051 tester to vehicle with VAS5051/1 diagnostic wire. Alternately, VAG1551 Scan Tool (ST) can also be attached using VAG1551/3B adapter.


NOTE: Data Link Connector (DLC) is located in front left knee bolster.


WARNING!
Observe safety precautions


NOTE:
The following description only explains implementation of On Board Diagnostic using VAG1551 Scan tool.
When using the VAS5051 tester, observe the tester's instructions for use


Indicated on display:


VAG - ON BOARD DIAGNOSTIC HELP
1 - Rapid data transfer 1)
2 - Blink code output 1)


1) Operating modes 1 and 2 are displayed alternately


NOTE:
If nothing appears in display:
- Perform troubleshooting procedure after "troubleshooting procedure leak test".


Depending on desired function, Table "Selectable functions" Selectable Functions When Using VAG1551/1552 or VAS5051
- Switch ignition on.
or
- Start engine.

- Press -Print- button to turn on Scan Tool (ST) printer. Indicator lamp in button must light up.
- Press button 1 to select "Rapid data transfer" operating mode 1.

When indicated on display:


Rapid data transfer HELP
Insert address word XX


NOTE: The address word 00 initiates the automatic test sequence, i.e. ft results in a DTC check on all OBD capable systems in the vehicle via rapid data transfer.


- Press buttons -0- and -1- to select "engine electronics" and press -Q- button to confirm input.

VAG1551 Scan Tool (ST) display indicates control module identification, e.g.:


3B0907551BA 2.81 V6/5V G 0003 ->
Coding 07252 WSC 12345


NOTE: Control module identification can be printed by pressing the PRINT key of the VAG1551 scan tool.


Control module identification (example)

- 3B0907551BA part number: allocation
- 2.8 L Engine displacement
- V6/5V Construction style of engine (V engine, 6 cylinder, 5 valves)
- "G" i.e. no indication Vehicle with or without cruise control system
- 0003 Data version (software version) of control module
- Coding 07252 Control module coding
- WSC 12345 Factory identification of VAG1551, with which the last coding was performed

- Press -> button.

Indicated on display (function selection):


Rapid data transfer HELP
Select function XX


NOTE:
- It will be possible to display the control module identification again after pressing buttons -0- and -1- to select "Check Control Module Versions" and confirming with the -Q- button.
- When indicated on display:


Rapid data transfer HELP
Control module does not answer


- Perform troubleshooting procedure after "troubleshooting procedure leak test":


Rapid data transfer HELP
K-wire not switching to Ground


Indicated on display


Rapid data transfer HELP
K-wire not switching to B+


Indicated on display


Rapid data transfer HELP
Error in communication link