Connecting VAG 1551 Scan Tool
The following test sequences are described for the V.A.G 1551 Scan Tool (ST).
Special tools and equipment
- V.A.G 1551 Scan Tool (ST)
- VAG 1551/3B cable
NOTE: If V.A.G 1551 Scan Tool (ST) is not available, use VAG 1552 Mobile Scan Tool (ST) instead, although this tool cannot produce a print-out.
Procedure
- Connect V.A.G 1551 Scan Tool (ST) using VAG 1551/3B cable.
NOTE:
- If nothing is indicated on the display, check voltage supply of diagnostic cable:
- 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.
- Operate scan tool according to indications on display:
Indicated on display:
VAG - On Board Diagnostic (OBD) HELP
1 - Rapid data transfer 1)
2 - Blink code output 1)
1) shown 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.:
4B0906018P 1.8 R4/5VT Motr G 0001 ->
Coding 07501 WSC 00000
- 4B0 906 018 P = Part No. of control module.
- 1.8 L = Engine displacement
- R4/5VT - Construction style of engine (inline engine, 4 cylinder, 5 valves, turbo)
- MOTR = system identification (Motronic)
- G = cruise control enabled
- HS = Manual transmission (Hand Shifting) AT = Automatic Transmission
- 0001 = Program version number
- Coding xxxxx = coding of control module, coding version of Engine Control Module (ECM).
- WSC xxxxx = Factory identification from the V.A.G 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, Engine Control Module (ECM).
- Press -> button.
Indicated on display:
Rapid data transfer HELP
Select function XX
- See repair procedures for further steps.