Remove CTS connector and check voltage across harness terminals. Turn ignition on. If reading is below 4 volts, go to step 2). If reading is above 4 volts, connect an ohmmeter across CTS terminals. Read resistance on ohmmeter. See COOLANT TEMPERATURE SENSOR RESISTANCE
table. If resistance is not equal to table reading, replace CTS.COOLANT TEMPERATURE SENSOR RESISTANCE
| Temperature |
Ohms |
| -22°F (-30°C) |
26,000 |
| -4°F (-20°C) |
15,000 |
| 32°F (0°C) |
5600 |
| 68°F (20°C) |
2500 |
| 104°F (40°C) |
1200 |
| 140°F (60°C) |
600 |
| 176°F (80°C) |
320 |
| 212°F (100°C) |
180 |