Connecting VAG 1551 Scan Tool

Special tools and equipment





- VAG1551 Scan Tool (ST)

NOTE:
If VAG1551 Scan Tool is not available, use VAG1552 Mobile Scan Tool instead, although this tool cannot produce a print-out.
All functions of the VAG1551/1552 scan tools can also be performed using the new VAS5051 tester. Connect VAS5051. Connecting VAS 5051 Scan Tool





- VAG 1551/3 wire

Test requirements





- Fuses no. 5, 10, 13, 28, 29, 32, 34 and 43 must be OK.
- Battery voltage must be at least 11.5 volts.
- Ground (GND) connections between engine and chassis must be OK.

Work procedure





- Connect VAG1551 Scan Tool using VAG1551/3 adapter.

After Scan Tool is connected:
- Depending on the desired function:
switch on ignition
or
start engine. Refer to "Selectable Functions When Using VAG1551/1552 or VAS5051" Selectable Functions When Using VAG1551/1552 or VAS5051

NOTE:
- If nothing is indicated on the display, check voltage supply of diagnostic cable:
- If the indications shown in the work procedure are not obtained on the display: See Scan Tool operating instructions
- 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

V.A.G - ON BOARD DIAGNOSTIC 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.:

06A906032CM 1.8L R4/5VT G 0001 ->
Coding 06530 WSC 00000

- 06A 906 032 CM = Part No. of control module
- 1.8l = Engine displacement
- R4/5VT = Construction style of engine (inline engine, 4 cylinder, 5 valves, turbo)
- G = cruise control enabled
- 0001 = Program version number
- Coding xxxxx = coding of control module, coding version of Engine Control Module (ECM). Refer to "Engine Control Module (ECM), Coding" Service and Repair
- WSC xxxxx = Factory identification from VAG1551, 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. Refer to "Engine Control Module (ECM), Replacement" Service and Repair


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. Refer to "Engine Control Module (ECM), Coding" Service and Repair
- Press -> button.

Indicated on display


Rapid data transfer HELP
Select function XX


- See repair procedures for further steps.