Fault Detection/Management
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2006 Ford RV Cutaway, 2006 Ford Pickup, 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 Ford Econoline. However, it is still accessible from the selected car via links, so may be relevant.
The ECT sensor is located on the left side of the front engine cover. The PCM supplies a 5-volt reference signal that the ECT sensor uses to produce an analog voltage, indicating the temperature. The PCM continuously monitors the signal of the ECT sensor to determine if the signal is within an expected range. If the PCM detects an out of range high or low, the PCM ignores the ECT signal and substitutes the EOT signal. If both the ECT and engine oil temperature (EOT) signals are out of range, the PCM assumes and engine coolant temperature of -34°C (-29°F) for starting and 82°C (180°F) for engine running conditions.
TEMPERATURE VS. RESISTANCE VALUES (APPROXIMATE)
| Degrees C | Degrees F | Ohms |
|---|---|---|
| 100 | 212 | 2,080 |
| 90 | 194 | 2,803 |
| 80 | 176 | 3,836 |
| 70 | 158 | 5,337 |
| 60 | 140 | 7,556 |
| 50 | 122 | 10,908 |
| 45 | 113 | 13,216 |
| 40 | 104 | 16,092 |
| 35 | 95 | 19,696 |
| 30 | 86 | 24,329 |
| 25 | 77 | 30,000 |
| 20 | 68 | 37,352 |
| 15 | 59 | 46,797 |
| 10 | 50 | 59,016 |
| 5 | 41 | 79,940 |
| 0 | 32 | 95,851 |
| -5 | 23 | 124,485 |
| -10 | 14 | 160,313 |
| -15 | 5 | 209,816 |
| -20 | -4 | 276,959 |
| -30 | -22 | 496,051 |
| -40 | -40 | 925,021 |