Coolant Temperature Sensor
Warm engine to normal operating temperature and run engine at idle. Turn ignition on. Check for 5 volts between sensor terminal and ground. If voltage is not as specified, check wiring harness for open or short circuit, and check resistance using COOLANT TEMPERATURE SENSOR RESISTANCE table.
COOLANT TEMPERATURE SENSOR RESISTANCE
| Temperature °F (°C) | Ohms |
|---|---|
| -4 (-20) | 14,600-17,800 |
| 68 (20) | 2200-2700 |
| 176 (80) | 290-350 |