EuroVan (2.5L)
- Ensure engine is cold. Connect Scan Tester (VAG 1551) to Data Link Connectors (DLC) located in fold-down storage shelf in front of relay panel. With scan tester in READ MEASUREMENT BLOCK function, read coolant temperature value in channel No. 1 of scan tester.
- Temperature value must increase uniformly without interruption. If coolant temperature value does not change, test circuit using PIN VOLTAGE CHARTS article. If necessary, replace engine coolant temperature sensor. After repairs, erase DTC memory (if applicable) and select END DATA TRANSFER function.