Engine Coolant Temperature Sensor
- Ensure engine is cold. Connect Scan Tester (VAG 1551) to Data Link Connectors (DLC) located in center console, in front of shift lever. Start engine and allow it to idle.
- With scan tester in READ TEST VALUE BLOCK function, select group "01" and read coolant temperature value in field No. 2 of scan tester. Temperature value must increase uniformly without interruption. If value increases as specified, select END OUTPUT function on scan tester.
- If displayed value does not change or if engine malfunctions during certain temperature range, turn ignition off and measure engine coolant temperature sensor resistance. Refer to the ENGINE COOLANT TEMPERATURE SENSOR RESISTANCE table.
ENGINE COOLANT TEMPERATURE SENSOR RESISTANCE
| Temperature °F (°C) | Ohms |
|---|---|
| 68 (20) | 3000-2000 |
| 86 (30) | 2000-1500 |
| 104 (40) | 1500-1000 |
| 122 (50) | 1000-800 |
| 140 (60) | 700-500 |
| 158 (70) | 500-375 |
| 176 (80) | 375-275 |
| 194 (90) | 275-225 |