PINPOINT TEST DX: Engine Coolant Temperature (ECT) Sensor: Introduction
WARNING: This page does not describe the selected car, but rather 34 other vehicles, including the 2019 Lincoln Navigator, 2019 Lincoln Nautilus, 2019 Lincoln MKZ, 2019 Lincoln MKT, and 2019 Lincoln MKC. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Engine coolant temperature must be greater than 10°C (50°F) to pass the KOEO self-test and greater than 82°C (180°F) to pass the KOER self-test.
This pinpoint test is intended to diagnose the following:
- ECT sensor (12A648)
- harness circuits: ECT and SIGRTN
- powertrain control module (PCM) (12A650)
TEMPERATURE SENSOR VOLTAGE AND RESISTANCE SPECIFICATIONS
| Temperature | Temperature Sensor Values | |
|---|---|---|
| °C | °F | Resistance (K ohms) |
| 120 | 248 | 1.18 |
| 110 | 230 | 1.55 |
| 100 | 212 | 2.07 |
| 90 | 194 | 2.80 |
| 80 | 176 | 3.84 |
| 70 | 158 | 5.37 |
| 60 | 140 | 7.70 |
| 50 | 122 | 10.97 |
| 40 | 104 | 16.15 |
| 30 | 86 | 24.27 |
| 20 | 68 | 37.30 |
| 10 | 50 | 58.75 |
| 0 | 32 | 95.85 |
| -10 | 14 | 160.31 |
Harness Side
| Circuit | Pin |
|---|---|
| ECT (Engine Coolant Temperature) | 1 |
| SIGRTN (Signal Return) | 2 |
Harness Side
| Circuit | Pin |
|---|---|
| ECT (Engine Coolant Temperature) | E38 |
| SIGRTN (Signal Return) | E13 |