Pinpoint Tests DX: Engine Coolant Temperature (ECT) Sensor: Introduction
WARNING: This page does not describe the selected car, but rather 27 other vehicles, including the 2021 Lincoln Navigator, 2021 Lincoln Nautilus, 2021 Lincoln Corsair, 2021 Lincoln Aviator, and 2021 Ford Transit-350 HD. 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)
Voltage values calculated for VREF equals 5 volts. These values may vary by 15% due to sensor and VREF variations.
| 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 |
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| EcoSport, Mustang, Ranger, Transit Connect 2.0L | A | 2 1 |
SIGRTN ECT |
| All other vehicles | B | 2 1 |
SIGRTN ECT |
Powertrain Control Module (PCM) Connector
For PCM connector views or reference values, refer to Reference Values.
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| Aviator, Explorer 3.0L, Explorer 3.3L | 306 PIN | E13 E29 |
SIGRTN ECT |
| Continental, EcoSport 2.0L | 198 PIN | E20 E46 |
SIGRTN ECT |
| EcoSport 1.0L Automatic Transmission | 198 PIN | E20 E35 |
SIGRTN ECT |
| EcoSport 1.0L Manual Transmission | 198 PIN | E10 E23 |
SIGRTN ECT |
| EcoSport 1.5L Automatic Transmission, KA 1.5L Automatic Transmission | 198 PIN | E12 E33 |
SIGRTN ECT |
| EcoSport 1.5L Manual Transmission, KA 1.2L | 112 PIN | E3 E23 |
SIGRTN ECT |
| Edge 2.0L, Nautilus 2.0L | 198 PIN | E20 E38 |
SIGRTN ECT |
| Edge 2.7L, Nautilus 2.7L | 306 PIN | E20 E29 |
SIGRTN ECT |
| F-150 | 306 PIN | E39 E71 |
SIGRTN ECT |
| KA 1.0L | 128 PIN | E15 E27 |
SIGRTN ECT |
| KA 1.5L Manual Transmission | 112 PIN | E23 E23 |
SIGRTN ECT |
| Ranger 2.5L | 128 PIN | E3 E31 |
SIGRTN ECT |
| Transit Connect 2.0L | 198 PIN | E13 | SIGRTN |
| All other vehicles | 198 PIN | E13 E38 |
SIGRTN ECT |