Section 19 (Engine Controls - Pin Voltage Charts): Introduction
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 1990 Volkswagen Vanagon, 1990 Volkswagen Jetta, 1990 Volkswagen Golf, 1990 Volkswagen GTI, and 1990 Volkswagen Fox. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Cabriolet pin voltage and sensor operating range charts are not available from manufacturer.