Coolant Temperature Sensor
Remove CU connector plug. On 944-S models, connect ohmmeter between CU terminal No. 45 and ground. On all other models, connect ohmmeter between CU terminal No. 13 and ground. Compare ohmmeter readings to COOLANT TEMPERATURE SENSOR RESISTANCE table.
COOLANT TEMPERATURE SENSOR RESISTANCE
| Temperature | Ohms +/-10% |
|---|---|
| 50°F (10°C) | 3300-4100 |
| 68°F (20°C) | 2200-2800 |
| 104°F (40°C) | 1000-1300 |
| 176°F (80°C) | 290-350 |
| 212°F (100°C) | 160-210 |