Sensor Testing
Disconnect sensor harnesses and measure the resistance across the coolant temperature sensor terminals. Compare sensor resistance to coolant temperature. Replace coolant temperature sensor if resistance does not meet specifications.
TESTING COOLANT TEMPERATURE SENSOR
| Temperature | Resistance (Ohms) |
|---|---|
| 15 °F (-10 °C) | 7000-12,000 |
| 50 °F (10 °C) | 3000-5000 |
| 70 °F (21 °C) | 2000-3000 |
| 125 °F (52 °C) | 700-1000 |
| 175 °F (80 °C) | 200-400 |