Pinpoint Test K: Engine Coolant Temperature (ECT) Sensor: Introduction
This pinpoint test is intended to diagnose the following:
- ECT sensor (12A648)
- harness circuits: ECT and SIGRTN
- powertrain control module (PCM) (12A650)
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 |