Connecting VAG 1551 Scan Tool

VAG 1551/VAG 1552 Scan Tool (ST), connecting and selecting "Engine Electronics" address word 01

WARNING!
- When driving or riding in an airbag-equipped vehicle, NEVER hold the scan tool or other test equipment in your hands or lap while in motion. Objects between you and the airbag increase the risk of injury in an accident.
- During a test drive in an airbag-equipped vehicle, test equipment must always be fastened to and operated from the rear seat by a second technician.

Required special tools and test equipment
VAG 1551 Scan Tool (ST) with VAG 1551/3 adapter cable

NOTE: VAG 1552 can also be used, but there is no print-out capability.

Requirements
- Fuses for engine electronics OK
- Battery Positive Voltage (B+) OK (at least 11 volts)
- Engine and transmission GND connections OK
- Fuel pump relay OK

Connecting







- Locate Data Link Connector (DLC), under driver's knee bar to left side of steering wheel.
- Connect VAG 1551 Scan Tool (ST) with VAG 1551/3 adapter cable to DLC.
- Switch ignition on, or start engine, depending on function to be selected. Application and ID

NOTE:
- If scan tool displays do not appear as indicated:
- If "Error in communication link" is displayed, disconnect adapter cable at scan tool, reconnect, and repeat procedure.

- Operate scan tool and advance through program sequence by following display:
- Press button -1- to select "Rapid data transfer" operating mode 01.
- Press buttons -0- and -1- to insert "Engine Electronics" address word 01, and press -Q- button to confirm input.

Indicated on display (ECM identification and coding, example)

4D0907551A 2.8L V6/5V MOTR AT D01 ->
Coding 06052 WSC 00000

4D0 Engine Control Module
(ECM) Part No. (for current version of control module -> parts catalog)
2.8 L Engine displacement
V6/5V Engine type:
V-engine, 6-cylinder, 5-valve
MOTR Motronic
HS Manual transmission
AT Automatic transmission
D ECM software version
Coding ECM coding
Coding variations
WSC 12345 Dealership number: indicates where VAG 1551 scan tool was used for last coding and/or adaptation (if factory coding has not been changed, WSC 00000 is displayed)


NOTE: If the ECM version that corresponds to the vehicle is not displayed, replace ECM.Incorrect ECM coding leads to:


- Performance problems (e.g. jerky shifting, abrupt load changes, etc.)
- Increased fuel consumption
- Elevated exhaust gas values
- Reduction in transmission service life
- Storage of non-existent malfunctions in DTC memory
- Necessary functions not being carried out (oxygen sensor control, actuation of EVAP canister system, etc.)
- Press -> button to advance through program sequence.

Indicated on display


Rapid data transfer HELP
Select function XX


- Continue as specified in procedures for specific OBD functions.