VAG On-Board Diagnostics: Notes

WARNING: This page is about a different car, the 1993 Volkswagen EuroVan. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: If VAG SELF-DIAGNOSIS (VAG ON-BOARD DIAGNOSTIC) display does not appear on scan tester, check DLC terminals for battery voltage and ground. Upper terminal should have battery voltage, bottom terminals serve as ground.