Connecting VAG 1551 Scan Tool
Connect VAG 1551
Special tools and equipment
- VAG 1551 Scan Tool (ST)
- VAG 1551/3B cable
NOTE: If VAG 1551 Scan tool (ST) is not available, use VAG 1552 Scan tool (ST) instead, although this tool cannot produce a print-out.
Procedure
- Connect VAG 1551 Scan tool (ST) using VAG 1551/3 adapter.
- Depending on the desired function: switch on ignition or start engine. Selectable Functions When Using VAG1551/1552 or VAS5051
NOTE:
- If nothing is indicated on the display, check voltage supply of diagnostic cable according to troubleshooting procedure:
- If indications shown in work procedure are not obtained on display:
See Operating instructions for Scan Tool (ST)
- If "Malfunction in data transfer!" is indicated due to entry error, disconnect wire at scan tool, reconnect and perform work steps again.
Indicated on display:
VAG - On Board Diagnostic (OBD) HELP
1 - Rapid data transfer*
2 - Blink code output*
* Two operating modes are displayed alternately
- Operate scan tool according to indications on display:
- Press button 1 to select "Rapid data transfer" operating mode 1.
- Press buttons -0- and -1- to select "Engine electronics" address word 01. Press -Q- button to confirm input.
Display will indicate the control module identification and the coding, e.g.:
022906032F MOTRONIC ME7.1 G V003 ->
Coding 00013 WSC 00000
- 022 906 032 F Part No. of control module (for current control module version, see parts catalog)
- MOTRONIC ME7.1 = system identification (Motronic)
- G = Cruise control system
- V003 = Program version number
- Coding 00013 = coding of control module, coding version of Engine Control Module (ECM). Programming and Relearning
- WSC 00000 = Factory identification from the VAG 1551 Scan tool (ST), with which the last coding was performed. (if factory coding has not been changed, WSC 00000 will be displayed)
NOTE: If the control module version that is appropriate for this vehicle is not indicated, replace the control module.
An incorrect coding of the Engine Control Module (ECM) causes:
- Driveability problems (shifting pressure, tip-in shock etc.)
- Increased fuel consumption
- Increased emissions values
- The storage of non-existent malfunctions in DTC memory
- Necessary functions not being performed (oxygen sensor regulation, activation of the EVAP canister system, etc.)
- Reduction in transmission service life
If coding differs from vehicle version:
- Check control module coding. Programming and Relearning
- Press the -> button.
Indicated on display:
Rapid data transfer HELP
Select function XX
- See repair procedures for further steps.