PINPOINT TEST FA: Ambient Air Temperature (AAT) 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.
This pinpoint test is intended to diagnose the following:
- AAT sensor
- harness circuits: AAT and SIGRTN
AMBIENT AIR TEMPERATURE (AAT) SENSOR EXPECTED VALUES
| Temperature | AAT Sensor Values | |
|---|---|---|
| °C | °F | Resistance (K ohms) |
| -1.1 to 4.4 | 30 to 40 | 5.18 to 4.50 (Transit), 27.49 to 33.47 (All Others) |
| 4.4 to 10 | 40 to 50 | 4.50 to 3.84 (Transit), 22.06 to 28.86 (All Others) |
| 10 to 15.6 | 50 to 60 | 3.84 to 3.30 (Transit), 16.63 to 23.10 (All Others) |
| 15.6 to 21.1 | 60 to 70 | 3.30 to 2.70 (Transit), 11.74 to 17.32 (All Others) |
| 21.1 to 26.7 | 70 to 80 | 2.70 to 2.30 (Transit), 9.34 to 12.14 (All Others) |
| 26.7 to 32.2 | 80 to 90 | 2.30 to 1.98 (Transit), 8.49 to 9.62 (All Others) |
| 32.2 to 37.8 | 90 to 100 | 1.98 to 1.66 (Transit), 5.93 to 7.87 (All Others) |
| 37.8 to 43.3 | 100 to 110 | 1.66 to 1.20 (Transit), 4.78 to 6.11 (All Others) |
Harness Side
| Circuit | Pin |
|---|---|
| AAT (Ambient Air Temperature) | 1 |
| SIGRTN (Signal Return) | 2 |
Harness Side
| Circuit | Pin |
|---|---|
| AAT (Ambient Air Temperature) | 20 |
| SIGRTN (Signal Return) | 19 |
Harness Side
| Circuit | Pin |
|---|---|
| AAT (Ambient Air Temperature) | B31 |
| SIGRTN (Signal Return) | B36 |