Connecting VAG 1551 Scan Tool

VAG 1551 scan tool, connecting and selecting engine control module

Special tools, test equipment and auxiliary items








- VAG 1551 scan tool







- VAG 1551/3B Cable


NOTE:
- The newest version of connection wire must always be used or else communication problems can occur between the scan tool and the control module.
- VAG 1552 mobile scan tool can be used instead of VAG 1551 scan tool, but no print-out can be created.
- All functions of the VAG 1551/1552 can also be performed with the tester VAS 5051. Connecting the VAS 5051. Connecting VAS 5051 Scan Tool


Test conditions







- All fuses must be OK
- The battery voltage must be at least 11.5 V
- Ground connection between engine and body must be OK
- All electrical accessories, e.g. lights and rear window defroster must be switched off
- If the vehicle is equipped with air conditioner, this must be switched off
- Selector lever must be in position "P" or "N" on vehicles with an automatic transmission.

Work sequence







- Connect scan tools VAG 1551 or 1552 with VAG 1551/3B cable.

After the scan tool has been connected:
- Depending upon desired function: switch ignition on or start engine, Table "Selectable functions". Selectable Functions When Using VAG1551/1552 or VAS5051


NOTE:
- If the display remains blank, check voltage supply for diagnostic connection:
- If the display does not indicate as described in the work sequence:
- If due to an input malfunction "Error in communication link" is displayed, disconnect wire from scan tool, reconnect and repeat work step.


Indicated on display


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


* Appears alternately

- Operate scan tool taking into account information on display.
- Press button -1- for "Rapid data transfer."
- Press buttons -0- and -1- for address word "Engine electronics" and confirm entry with -Q- button.

The control module identification and coding are indicated on the display, e.g.:


06A906032BR 2.0 L R4/2V G *3538 ->
Coding 00001 WSC 00000


- 06A 906 032 BR Part No. of the control module (for latest control module version see parts catalog)
- 2.0 l = Displacement
- R4/2V = Motor design (4 cylinder, in line, 2 valves)
- G = Cruise control active
- *3538 = Program-stand-number
- Coding xxxxx = Transmission type e.g. 00001 for Manual Transmission, 00003 for Automatic Transmission (only additional information)
- WSC xxxxx = Workshop code from VAG 1551, of the workshop where last coding was performed. (If the factory coding has not been changed, WSC 00000 appears).


NOTE: Replace control module if the control version displayed does not correspond to the vehicle. [1][2]Replacing Engine Control Module (ECM)

An incorrectly coded engine control module leads to:
- Engine running malfunctions (gear change jerks, load change jerks, etc.)
- Increased fuel consumption
- Increased exhaust gas emissions
- DTCs stored in DTC memory which are not actually present
- Functions will not be performed (Oxygen sensor control, activation of the EVAP system, etc.)
- Reduced transmission life.


- Press -> button.

Indicated on display


Rapid data transfer HELP
Select function XX


For further measures see repair procedures.