DTC 00779: Outside Air Temperature Sensor Circuit
WARNING: This page is about a different car, the 2001 Volkswagen EuroVan, 2000 Volkswagen EuroVan, 1999 Volkswagen EuroVan, and 1997 Volkswagen EuroVan. However, it is still accessible from the selected car via links, so may be relevant.
Check outside air temperature sensor under value block. See READING MEASURING VALUE BLOCK under SYSTEM TESTS. If DTCs for sunlight photo sensor, A/C engine coolant temperature sensor or front vent temperature sensor also exist, check continuity between terminal No. 17 (White/Red wire) of CCM harness connector "A" and splice located in CCM wiring harness. See WIRING DIAGRAMS . If wiring and connectors are okay, replace outside air temperature sensor.