VAG 1551 Scan Tool, Connecting, Functions & Checking
VAG 1551 Scan Tool (ST), Connecting, Selecting Functions & Checking Control Module Versions
The radio is controlled by a microprocessor which has extensive On Board Diagnostic (OBD) capability.
If malfunctions occur in the components being monitored, they will be stored in Diagnostic Trouble Code (DTC) together with an indication of the type of malfunction.
A maximum of 4 malfunctions can be stored simultaneously.
Sporadic malfunctions are automatically cancelled if they are not repeated in the next 50 engine starts.
Before starting any troubleshooting, always begin by checking the DTC memory using the On Board Diagnostic program.
Stored DTCs are retrieved and checked with:
- VAG1551 Scan Tool (ST)
- VAG1552 vehicle system tester
NOTE: The following description deals only with the VAG1551 scan tool.
Connecting VAG1551 scan tool and selecting functions
Requirements
- All fuses OK according to wiring diagram
- Battery (B+) voltage at least 9.0 V
Special tools and equipment
- VAG1551 Scan Tool (ST)
- VAG1551/3B adapter cable
The Data Link Connector (DLC) is located under the instrument panel to the left.
- Connect VAG1551 scan tool using VAG1551/3B adapter cable.
Indicated on display 1)
V.A.G - ON BOARD DIAGNOSTIC HELP
1 - Rapid data transfer
2 - Blink code output
1) Operating modes 1 and 2 are displayed alternately
NOTE:
- If the display remains blank, check VAG1551 voltage supply according to wiring diagram.
- Additional operating instructions can be printed out by pressing the HELP button.
- The -> button is used to advance through the program sequence.
- In "Rapid data transfer" operating mode 1, all vehicle control modules with OBD capability can be checked automatically using 'Automatic Test Sequence" address word 00.
- Switch ignition on.
- Switch printer on by pressing PRINT button (indicator lamp in button lights up).
- Press button -1- for "Rapid data transfer" mode.
Indicated on display
Rapid data transfer HELP
Insert address word XX
- Press buttons -5- and -6- to insert "Radio" address word 56.
Indicated on display
Rapid data transfer Q
56 - Radio
- Press -Q- button to confirm input.
Indicated on display
Rapid data transfer Q
Scan Tool sends address word 56
Check control module version (function 01)
Indicated on display
1CO035180 RADIO 0001
Coding 06401 WSC 01230
- 1CO035180: Part No. of control module
- RADIO: Component designation
- 0001: Software version installed in radio
- Coding 06401: Example of a coding for radio "New Beetle"
- WSC 01230: Dealership number 1)
1) Will be automatically stored in control module when entering the system.
CAUTION
- Part numbers are listed here for reference only.
- Always check with your Parts department for the latest information.
- Press -> button.
Indicated on radio display during OBD
DIAG
If indicated on display
Control module does not answer HELP
- By pressing HELP button, a list of possible malfunction causes is printed out.
- After repairing malfunction, insert address word 56
- Press -Q- button to confirm input.
Indicated on display 1)
1CO035180 RADIO 0001
Coding 06401 WSC 01230
1) Different Codings Code Control Module (Function 07)
- Press -> button.
Indicated on display
Rapid data transfer HELP
Select function XX
- Press HELP button
- List of available functions is printed out
List of available functions
01 - Check control module versions
02 - Check Diagnostic Trouble Code (DTC) memory
03 - Output Diagnostic Test Mode (DTM)
05 - Erase DTC memory
06 - End output
07 - Code control module
08 - Read measuring value block
NOTE:
- Do not select further functions, which can be printed out after pressing HELP button.
- After function is completed, VAG 1551 returns to following start position.
Indicated on display
Rapid data transfer HELP
Select function XX
To correctly diagnose all malfunctions, output Diagnostic Test Mode (DTM) must be carried out before checking DTC memory.