Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Automatic test sequence
The automatic test sequence checks all the Diagnostic Trouble Codes (DTC) memories of the control modules.
- Switch on ignition.
Indicated on display:
| V.A.G - On Board Diagnostic HELP 1 - Rapid data transfer1) 2 - Blink code output1) |
1) Is displayed alternately
- Press key -1- for "Rapid data transfer" operating mode.
- Switch on printer with the Print key (indicator lamp in key lights up).
Indicated on display:
| Rapid data transfer HELP Select function XX |
- Press key -0- twice; 00 to enter "Check automatic test sequence" function.
- Confirm entry with Q key.
The V.A.G 1551 scan tool will show the engine control module identification is displayed first e.g.
| 032906026BI 1.6l R4 MONO 1.3 D1 TEV Coding 00002 WSC XXXXX |
Thereafter all control module identifications with eventual DTC memory entries are displayed.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.